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Nicholas Saunders's questions

Martin Hope
Nicholas Saunders
Asked: 2023-12-21 07:19:31 +0800 CST
  • 5

How is slrn configured so that nano is used as an editor?

nicholas@mordor:~$ 
nicholas@mordor:~$ grep vim .slrnrc 
%set editor_command "vim -c %d '%s'"
nicholas@mordor:~$ 
nicholas@mordor:~$ grep nano .slrnrc
%set editor_command "nano -c %d '%s'"
nicholas@mordor:~$ 
nicholas@mordor:~$ slrn --version
slrn 1.0.3
S-Lang Library Version: 2.3.3
    * Note: This program was compiled against version 2.3.2.
Operating System: Linux

COMPILE TIME OPTIONS:
 Backends: +nntp +slrnpull +spool
 External programs / libs: +canlock +inews +ssl +uudeview +iconv
 Features: +decoding +emphasized_text +end_of_thread +fake_refs +gen_msgid
    -grouplens -msgid_cache +piping +rnlock +spoilers -strict_from
 Using 64 bit integers for article numbers.

DEFAULTS:
 Default server object:     nntp
 Default posting mechanism: nntp
nicholas@mordor:~$ 
nicholas@mordor:~$ lsb_release 
No LSB modules are available.
nicholas@mordor:~$

The documentation isn't overly specific on this:

https://help.ubuntu.com/community/slrn

only saying that it can be done.

command-line
Martin Hope
Nicholas Saunders
Asked: 2023-06-10 22:35:27 +0800 CST
  • 7

How is OpenJDK installed from snap so that javac and java are available from the CLI?

nicholas@mordor:~$ 
nicholas@mordor:~$ snap list
Name                       Version           Rev    Tracking         Publisher      Notes
bare                       1.0               5      latest/stable    canonical✓     base
chromium                   113.0.5672.126    2477   latest/stable    canonical✓     -
core18                     20230503          2751   latest/stable    canonical✓     base
core20                     20230503          1891   latest/stable    canonical✓     base
core22                     20230531          750    latest/stable    canonical✓     base
cups                       2.4.2-5           872    latest/stable    openprinting✓  -
firefox                    111.0.1-2         2517   latest/stable/…  mozilla✓       -
gnome-3-38-2004            0+git.6f39565     140    latest/stable    canonical✓     -
gnome-42-2204              0+git.587e965     102    latest/stable/…  canonical✓     -
gtk-common-themes          0.1-81-g442e511   1535   latest/stable/…  canonical✓     -
openjdk                    20.0.1+9          1349   latest/stable    jgneff         -
snap-store                 41.3-71-g709398e  959    latest/stable/…  canonical✓     -
snapd                      2.59.4            19361  latest/stable    canonical✓     snapd
snapd-desktop-integration  0.9               83     latest/stable/…  canonical✓     -
nicholas@mordor:~$ 
nicholas@mordor:~$ openjdk.java -version
openjdk version "20.0.1" 2023-04-18
OpenJDK Runtime Environment (build 20.0.1+9-snap)
OpenJDK 64-Bit Server VM (build 20.0.1+9-snap, mixed mode, sharing)
nicholas@mordor:~$ 
nicholas@mordor:~$ java --version
Command 'java' not found, but can be installed with:
sudo apt install openjdk-17-jre-headless  # version 17.0.7+7~us1-0ubuntu1~23.04, or
sudo apt install default-jre              # version 2:1.17-74
sudo apt install openjdk-11-jre-headless  # version 11.0.19+7~us1-0ubuntu1~23.04
sudo apt install openjdk-20-jre-headless  # version 20.0.1+9~us1-0ubuntu1~23.04
sudo apt install openjdk-8-jre-headless   # version 8u372-ga~us1-0ubuntu1~23.04
sudo apt install openjdk-18-jre-headless  # version 18.0.2+9-2ubuntu1
sudo apt install openjdk-19-jre-headless  # version 19.0.2+7-0ubuntu4
sudo apt install openjdk-21-jre-headless  # version 21~14ea~us1-0ubuntu1
nicholas@mordor:~$ 
nicholas@mordor:~$ javac --version
Command 'javac' not found, but can be installed with:
sudo apt install openjdk-17-jdk-headless  # version 17.0.7+7~us1-0ubuntu1~23.04, or
sudo apt install default-jdk              # version 2:1.17-74
sudo apt install openjdk-11-jdk-headless  # version 11.0.19+7~us1-0ubuntu1~23.04
sudo apt install openjdk-20-jdk-headless  # version 20.0.1+9~us1-0ubuntu1~23.04
sudo apt install openjdk-8-jdk-headless   # version 8u372-ga~us1-0ubuntu1~23.04
sudo apt install ecj                      # version 3.32.0+eclipse4.26-2
sudo apt install openjdk-18-jdk-headless  # version 18.0.2+9-2ubuntu1
sudo apt install openjdk-19-jdk-headless  # version 19.0.2+7-0ubuntu4
sudo apt install openjdk-21-jdk-headless  # version 21~14ea~us1-0ubuntu1
nicholas@mordor:~$ 
nicholas@mordor:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 23.04
Release:    23.04
Codename:   lunar
nicholas@mordor:~$

see also:

https://stackoverflow.com/q/67469925/4531180

https://snapcraft.io/install/openjdk/ubuntu

command-line
Martin Hope
Nicholas Saunders
Asked: 2023-05-20 20:03:12 +0800 CST
  • 5

How is the monero wallet GUI launched?

nicholas@mordor:~$ 
nicholas@mordor:~$ apt search monero
Sorting... Done
Full Text Search... Done
monero/jammy,now 0.17.2.0+~0+20200826-1ubuntu4 amd64 [installed]
  cryptocoin client for Monero network - daemon and tools

monero-tests/jammy 0.17.2.0+~0+20200826-1ubuntu4 amd64
  cryptocoin client for Monero network - testsuite

nicholas@mordor:~$ 
nicholas@mordor:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 22.04 LTS
Release:    22.04
Codename:   jammy
nicholas@mordor:~$

The above package allows for running monero-wallet-cli but there's no corresponding monero-wallet-gui unfortunately.

apt
Martin Hope
Nicholas Saunders
Asked: 2022-07-01 05:58:33 +0800 CST
  • 1

Within the context of the Accept and Decline button missing in thunderbird when receiving an invitation where an answer in part explains:

Using the config editor, simply set calendar.google.enableEmailInvitations to true. You may also want to set calendar.google.sendEventNotifications to false to avoid the possibility of an old bug that sent new events instead of notifications; I've not tested this. Then, restart thunderbird.

How is calendar.google.enableEmailInvitations toggled to true?

There should be an option to open Preferences and then select "advanced" which was either changed, from when the question was asked, or I'm simply not seeing it.

thunderbird
Martin Hope
Nicholas Saunders
Asked: 2022-06-11 22:13:44 +0800 CST
  • 1

How are "word" or similar shortcuts assigned to search engines in Firefox to search specific search engines?

Concretely, it's entirely possible to use @wikipedia to search Wikipedia from the Firefox address bar. It's easy enough to add "wikipedia" as well.

As here:

http://kb.mozillazine.org/Using_keyword_searches

are only some websites supported?

Where are these key words viewable in settings or other configuration files to edit directly? The above kb article says to use a bookmark which is confusing. Wouldn't there be a list of keyword shortcuts for search?

see also:

https://superuser.com/q/850883/977796

However, it doesn't seem possible to directly add arbitrary search engines through the settings option. Specific search engines can be added, but only some. Not all search engines are listed.

firefox
Martin Hope
Nicholas Saunders
Asked: 2022-05-22 02:04:11 +0800 CST
  • 1

Right now I'm using GThumb to print images to PDF but am looking for a short-cut.

Certainly there are console based utilities to convert files to PDF but I'm looking to do that from the graphical interface. Presumably a print-to-PDF script could be executed from the graphical interface.

Would there be a ready-made solution? Looking to avoid any configuration. Something like:

print

would be ideal.

printing
Martin Hope
Nicholas Saunders
Asked: 2022-04-02 03:41:56 +0800 CST
  • 1

I'm looking to configure Thunderbird so that all three panes are dark, as:

dark thunderbird

However, after downloading and adding the Dark Reader plugin I get only a single pane dark. The list of messages is unchanged and still with black writing on a white background, as is the list of folders.

How do I ensure that all three panes are dark as pictured above?

(I use Dark Reader with Firefox but am certainly open to other such similar plug-in's or add-on's for Thunder Bird if they change the appearance.

I'm not looking to change how e-mails are sent or composed, simply how they're displayed on my end.)

version:

nicholas@mordor:~$ 
nicholas@mordor:~$ thunderbird --version
 Thunderbird 91.5.0
nicholas@mordor:~$ 
nicholas@mordor:~$ uname -a
Linux mordor 5.11.0-49-generic #55-Ubuntu SMP Wed Jan 12 17:36:34 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
nicholas@mordor:~$
software-recommendation
Martin Hope
Nicholas Saunders
Asked: 2021-09-15 21:36:47 +0800 CST
  • 1

Using the gpo text interface:

nicholas@gondor:~$ 
nicholas@gondor:~$ gpo

gPodder 3.10.17 (2020-11-23) - http://gpodder.org/
(c) 2005-2020 The gPodder Team
License: GNU General Public License, version 3 or later

Entering interactive shell. Type 'help' for help.
Press Ctrl+D (EOF) or type 'quit' to quit.

gpo> 
gpo> help

  Usage: gpo [--verbose|-v|--quiet|-q] [COMMAND] [params...]

  - Subscription management -

    subscribe URL [TITLE]      Subscribe to a new feed at URL (as TITLE)
    search QUERY               Search the gpodder.net directory for QUERY
    toplist                    Show the gpodder.net top-subscribe podcasts

    import FILENAME|URL        Subscribe to all podcasts in an OPML file
    export FILENAME            Export all subscriptions to an OPML file

    rename URL TITLE           Rename feed at URL to TITLE
    unsubscribe URL            Unsubscribe from feed at URL
    enable URL                 Enable feed updates for the feed at URL
    disable URL                Disable feed updates for the feed at URL

    info URL                   Show information about feed at URL
    list                       List all subscribed podcasts
    update [URL]               Check for new episodes (all or only at URL)

  - Episode management -

    download [URL] [GUID]      Download new episodes (all or only from URL) or single GUID
    delete [URL] [GUID]        Delete from feed at URL an episode with given GUID
    pending [URL]              List new episodes (all or only from URL)
    episodes [--guid] [URL]    List episodes with or without GUIDs (all or only from URL)
    partial [--guid]           List partially downloaded episodes with or without GUIDs
    resume [--guid]            Resume partially downloaded episodes or single GUID

  - Episode management -

    sync                       Sync podcasts to device

  - Configuration -

    set [key] [value]          List one (all) keys or set to a new value

  - Extension management -

    extensions [LIST]          List all available extensions
    extension info <NAME>      Information about an extension
    extension enable <NAME>    Enable an extension
    extension disable <NAME>   Disable an extension

  - Other commands -

    youtube URL                Resolve the YouTube URL to a download URL
    rewrite OLDURL NEWURL      Change the feed URL of [OLDURL] to [NEWURL]

gpo> 
gpo> exit
nicholas@gondor:~$ 
nicholas@gondor:~$ uname -a
Linux gondor 5.11.0-34-generic #36-Ubuntu SMP Thu Aug 26 19:22:09 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
nicholas@gondor:~$ 
nicholas@gondor:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 21.04
Release:    21.04
Codename:   hirsute
nicholas@gondor:~$

how are episodes actually played?

(Yes, the list command shows podcasts.)

command-line
Martin Hope
Nicholas Saunders
Asked: 2021-09-12 12:57:42 +0800 CST
  • 1

When starting up jack with the command hdajackretask the GUI reports that there aren't any codecs for recording audio. Off the top of my head, this seems nonsensical as I'm using Text Now and other VoIP apps without problem:

jack

nicholas@mordor:~$ 
nicholas@mordor:~$ sudo apt install ubuntu-restricted-extras
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
ubuntu-restricted-extras is already the newest version (67).
0 upgraded, 0 newly installed, 0 to remove and 154 not upgraded.
nicholas@mordor:~$ 
nicholas@mordor:~$ uname -a
Linux mordor 5.11.0-34-generic #36-Ubuntu SMP Thu Aug 26 19:22:09 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
nicholas@mordor:~$

Admittedly, the output of a command to list codecs wasn't immediately and easily human readable -- at least to this human.

The GUI documentation shows:

Start the application "hdajackretask" from the command line. Select a codec in the top bar; some people have only one - if you have more than one, one is the "main" one, and the rest are probably HDMI codecs.

which in no way addresses the fact that no codecs are found by jack itself.

sound
Martin Hope
Nicholas Saunders
Asked: 2021-07-28 14:42:47 +0800 CST
  • 4

How would I read the man page for calibre when it's installed from flatpak as below?

nicholas@gondor:~$ 
nicholas@gondor:~$ flatpak info com.calibre_ebook.calibre

calibre - The one stop solution to all your e-book needs

          ID: com.calibre_ebook.calibre
         Ref: app/com.calibre_ebook.calibre/x86_64/stable
        Arch: x86_64
      Branch: stable
     Version: 5.23.0
     License: GPL-3.0
      Origin: flathub
  Collection: org.flathub.Stable
Installation: system
   Installed: 360.9 MB
     Runtime: org.freedesktop.Platform/x86_64/20.08
         Sdk: org.freedesktop.Sdk/x86_64/20.08

      Commit: 13464e660f35716a725261af4b45d3abc199a3ce52ebdd9ee887c7ae623b5873
      Parent: 4f7f3b603f31cc781caf8260f887118a1bb466748891c9e122826728e25d3eed
     Subject: Update calibre-5.22.1-x86_64.txz to 5.23.0 (9184a3f3)
        Date: 2021-07-11 19:56:21 +0000
nicholas@gondor:~$ 
nicholas@gondor:~$ flatpak --version
Flatpak 1.8.2
nicholas@gondor:~$ 
nicholas@gondor:~$ man calibre
No manual entry for calibre
nicholas@gondor:~$

The search results I see are for how to use flatpak itself, which is only indirectly the question. No doubt the man pages are on the system itself.

command-line
Martin Hope
Nicholas Saunders
Asked: 2021-07-18 14:54:08 +0800 CST
  • 2

Where and how can I run the ebook-convert script for calibre from the console?

nicholas@gondor:~$ 
nicholas@gondor:~$ flatpak info com.calibre_ebook.calibre

calibre - The one stop solution to all your e-book needs

          ID: com.calibre_ebook.calibre
         Ref: app/com.calibre_ebook.calibre/x86_64/stable
        Arch: x86_64
      Branch: stable
     Version: 5.23.0
     License: GPL-3.0
      Origin: flathub
  Collection: org.flathub.Stable
Installation: system
   Installed: 360.9 MB
     Runtime: org.freedesktop.Platform/x86_64/20.08
         Sdk: org.freedesktop.Sdk/x86_64/20.08

      Commit: 13464e660f35716a725261af4b45d3abc199a3ce52ebdd9ee887c7ae623b5873
      Parent: 4f7f3b603f31cc781caf8260f887118a1bb466748891c9e122826728e25d3eed
     Subject: Update calibre-5.22.1-x86_64.txz to 5.23.0 (9184a3f3)
        Date: 2021-07-11 19:56:21 +0000
nicholas@gondor:~$ 
nicholas@gondor:~$ uname -a
Linux gondor 5.8.0-59-generic #66-Ubuntu SMP Thu Jun 17 00:46:01 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
nicholas@gondor:~$ 
nicholas@gondor:~$ man calibre
No manual entry for calibre
nicholas@gondor:~$ 
nicholas@gondor:~$ ebook-convert
Command 'ebook-convert' not found, but can be installed with:
sudo apt install calibre
nicholas@gondor:~$

Installed via flatpak because:

1.) calibre is, or at least wasn't, in snap repo 2.) have had problems with the apt version in the past

more of a flatpak usage q than specific to Ubuntu. Probably a calibre or flatpak man page will explain where or how to launch the conversion script -- but which man page?

tried:

nicholas@gondor:~$ 
nicholas@gondor:~$ flatpak run com.calibre_ebook.calibre.ebook-convert
error: app/com.calibre_ebook.calibre.ebook-convert/x86_64/master not installed
nicholas@gondor:~$ 
nicholas@gondor:~$ flatpak run com.calibre_ebook.ebook-convert
error: app/com.calibre_ebook.ebook-convert/x86_64/master not installed
nicholas@gondor:~$

see also

how to launch flatpak calibre from the console?

command-line
Martin Hope
Nicholas Saunders
Asked: 2021-05-03 10:39:31 +0800 CST
  • 6

Everything here works so far -- in that, crucially, the sound plays back.

How is the microphone itself tested?

nicholas@gondor:~$ 
nicholas@gondor:~$ sudo aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: STAC9228 Analog [STAC9228 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: Intel [HDA Intel], device 1: STAC9228 Digital [STAC9228 Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
nicholas@gondor:~$ 
nicholas@gondor:~$ aplay /usr/share/sounds/alsa/Front_Center.wav
Playing WAVE '/usr/share/sounds/alsa/Front_Center.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono
nicholas@gondor:~$ 
nicholas@gondor:~$ pacmd
Welcome to PulseAudio 13.99.2! Use "help" for usage information.
>>> list-sinks
1 sink(s) available.
  * index: 1
    name: <alsa_output.pci-0000_00_1b.0.analog-stereo>
    driver: <module-alsa-card.c>
    flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY
    state: SUSPENDED
    suspend cause: IDLE
    priority: 9039
    volume: front-left: 49789 /  76% / -7.16 dB,   front-right: 49789 /  76% / -7.16 dB
            balance 0.00
    base volume: 65536 / 100% / 0.00 dB
    volume steps: 65537
    muted: no
    current latency: 0.00 ms
    max request: 0 KiB
    max rewind: 0 KiB
    monitor source: 1
    sample spec: s16le 2ch 48000Hz
    channel map: front-left,front-right
                 Stereo
    used by: 0
    linked by: 0
    configured latency: 0.00 ms; range is 0.50 .. 1837.50 ms
    card: 0 <alsa_card.pci-0000_00_1b.0>
    module: 23
    properties:
        alsa.resolution_bits = "16"
        device.api = "alsa"
        device.class = "sound"
        alsa.class = "generic"
        alsa.subclass = "generic-mix"
        alsa.name = "STAC9228 Analog"
        alsa.id = "STAC9228 Analog"
        alsa.subdevice = "0"
        alsa.subdevice_name = "subdevice #0"
        alsa.device = "0"
        alsa.card = "0"
        alsa.card_name = "HDA Intel"
        alsa.long_card_name = "HDA Intel at 0xfe9fc000 irq 29"
        alsa.driver_name = "snd_hda_intel"
        device.bus_path = "pci-0000:00:1b.0"
        sysfs.path = "/devices/pci0000:00/0000:00:1b.0/sound/card0"
        device.bus = "pci"
        device.vendor.id = "8086"
        device.vendor.name = "Intel Corporation"
        device.product.id = "284b"
        device.product.name = "82801H (ICH8 Family) HD Audio Controller (Inspiron 1420)"
        device.form_factor = "internal"
        device.string = "front:0"
        device.buffering.buffer_size = "352800"
        device.buffering.fragment_size = "176400"
        device.access_mode = "mmap+timer"
        device.profile.name = "analog-stereo"
        device.profile.description = "Analog Stereo"
        device.description = "Built-in Audio Analog Stereo"
        module-udev-detect.discovered = "1"
        device.icon_name = "audio-card-pci"
    ports:
        analog-output-speaker: Speakers (priority 10000, latency offset 0 usec, available: unknown)
            properties:
                device.icon_name = "audio-speakers"
        analog-output-headphones: Headphones (priority 9900, latency offset 0 usec, available: no)
            properties:
                device.icon_name = "audio-headphones"
    active port: <analog-output-speaker>
>>> q
Unknown command: q
>>> quit
Unknown command: quit
>>> exit
>>> nicholas@gondor:~$

above is from:

https://help.ubuntu.com/community/SoundTroubleshooting

Ideally, I'd record a few sounds with the microphone to then troubleshoot zoom itself.

sound
Martin Hope
Nicholas Saunders
Asked: 2020-11-15 01:07:01 +0800 CST
  • 4

Recognizing that this is basically a FAQ:

nicholas@mordor:~$ 
nicholas@mordor:~$ sudo apt --fix-broken install
Reading package lists... Done
Building dependency tree       
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
nicholas@mordor:~$ 
nicholas@mordor:~$ sudo apt autoremove
Reading package lists... Done
Building dependency tree       
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
nicholas@mordor:~$ 
nicholas@mordor:~$ sudo dpkg --get-selections | grep hold
nicholas@mordor:~$ 
nicholas@mordor:~$ sudo apt install mariadb-server mariadb-client
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help resolve the situation:

The following packages have unmet dependencies:
 mariadb-server : Depends: mariadb-server-10.3 (>= 1:10.3.25-0ubuntu0.20.04.1) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
nicholas@mordor:~$ 
nicholas@mordor:~$ sudo apt upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
nicholas@mordor:~$ 
nicholas@mordor:~$ sudo apt update
Hit:1 http://ca.archive.ubuntu.com/ubuntu focal InRelease
Hit:2 http://ca.archive.ubuntu.com/ubuntu focal-updates InRelease
Hit:3 http://ca.archive.ubuntu.com/ubuntu focal-backports InRelease
Hit:4 http://security.ubuntu.com/ubuntu focal-security InRelease
Reading package lists... Done
Building dependency tree       
Reading state information... Done
All packages are up to date.
nicholas@mordor:~$ 
nicholas@mordor:~$ sudo apt install mariadb-server mariadb-client
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help resolve the situation:

The following packages have unmet dependencies:
 mariadb-server : Depends: mariadb-server-10.3 (>= 1:10.3.25-0ubuntu0.20.04.1) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
nicholas@mordor:~$

but how do I find out what's held or broken?

also:

nicholas@mordor:~$ 
nicholas@mordor:~$ sudo apt-get install -f
Reading package lists... Done
Building dependency tree       
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
nicholas@mordor:~$ 
nicholas@mordor:~$ sudo dpkg --configure -a
nicholas@mordor:~$

sources:

nicholas@mordor:~$ 
nicholas@mordor:~$ cat /etc/apt/sources.list
# deb cdrom:[Ubuntu 20.04 LTS _Focal Fossa_ - Release amd64 (20200423)]/ focal main restricted

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://ca.archive.ubuntu.com/ubuntu/ focal main restricted
# deb-src http://ca.archive.ubuntu.com/ubuntu/ focal main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://ca.archive.ubuntu.com/ubuntu/ focal-updates main restricted
# deb-src http://ca.archive.ubuntu.com/ubuntu/ focal-updates main restricted

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://ca.archive.ubuntu.com/ubuntu/ focal universe
# deb-src http://ca.archive.ubuntu.com/ubuntu/ focal universe
deb http://ca.archive.ubuntu.com/ubuntu/ focal-updates universe
# deb-src http://ca.archive.ubuntu.com/ubuntu/ focal-updates universe

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu 
## team, and may not be under a free licence. Please satisfy yourself as to 
## your rights to use the software. Also, please note that software in 
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://ca.archive.ubuntu.com/ubuntu/ focal multiverse
# deb-src http://ca.archive.ubuntu.com/ubuntu/ focal multiverse
deb http://ca.archive.ubuntu.com/ubuntu/ focal-updates multiverse
# deb-src http://ca.archive.ubuntu.com/ubuntu/ focal-updates multiverse

## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://ca.archive.ubuntu.com/ubuntu/ focal-backports main restricted universe multiverse
# deb-src http://ca.archive.ubuntu.com/ubuntu/ focal-backports main restricted universe multiverse

## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
# deb http://archive.canonical.com/ubuntu focal partner
# deb-src http://archive.canonical.com/ubuntu focal partner

deb http://security.ubuntu.com/ubuntu focal-security main restricted
# deb-src http://security.ubuntu.com/ubuntu focal-security main restricted
deb http://security.ubuntu.com/ubuntu focal-security universe
# deb-src http://security.ubuntu.com/ubuntu focal-security universe
deb http://security.ubuntu.com/ubuntu focal-security multiverse
# deb-src http://security.ubuntu.com/ubuntu focal-security multiverse

# This system was installed using small removable media
# (e.g. netinst, live or single CD). The matching "deb cdrom"
# entries were disabled at the end of the installation process.
# For information about how to configure apt package sources,
# see the sources.list(5) manual.
nicholas@mordor:~$

Policy:

nicholas@mordor:~$ 
nicholas@mordor:~$ apt policy
Package files:
 100 /var/lib/dpkg/status
     release a=now
 500 http://security.ubuntu.com/ubuntu focal-security/multiverse amd64 Packages
     release v=20.04,o=Ubuntu,a=focal-security,n=focal,l=Ubuntu,c=multiverse,b=amd64
     origin security.ubuntu.com
 500 http://security.ubuntu.com/ubuntu focal-security/universe i386 Packages
     release v=20.04,o=Ubuntu,a=focal-security,n=focal,l=Ubuntu,c=universe,b=i386
     origin security.ubuntu.com
 500 http://security.ubuntu.com/ubuntu focal-security/universe amd64 Packages
     release v=20.04,o=Ubuntu,a=focal-security,n=focal,l=Ubuntu,c=universe,b=amd64
     origin security.ubuntu.com
 500 http://security.ubuntu.com/ubuntu focal-security/restricted i386 Packages
     release v=20.04,o=Ubuntu,a=focal-security,n=focal,l=Ubuntu,c=restricted,b=i386
     origin security.ubuntu.com
 500 http://security.ubuntu.com/ubuntu focal-security/restricted amd64 Packages
     release v=20.04,o=Ubuntu,a=focal-security,n=focal,l=Ubuntu,c=restricted,b=amd64
     origin security.ubuntu.com
 500 http://security.ubuntu.com/ubuntu focal-security/main i386 Packages
     release v=20.04,o=Ubuntu,a=focal-security,n=focal,l=Ubuntu,c=main,b=i386
     origin security.ubuntu.com
 500 http://security.ubuntu.com/ubuntu focal-security/main amd64 Packages
     release v=20.04,o=Ubuntu,a=focal-security,n=focal,l=Ubuntu,c=main,b=amd64
     origin security.ubuntu.com
 100 http://ca.archive.ubuntu.com/ubuntu focal-backports/universe i386 Packages
     release v=20.04,o=Ubuntu,a=focal-backports,n=focal,l=Ubuntu,c=universe,b=i386
     origin ca.archive.ubuntu.com
 100 http://ca.archive.ubuntu.com/ubuntu focal-backports/universe amd64 Packages
     release v=20.04,o=Ubuntu,a=focal-backports,n=focal,l=Ubuntu,c=universe,b=amd64
     origin ca.archive.ubuntu.com
 500 http://ca.archive.ubuntu.com/ubuntu focal-updates/multiverse i386 Packages
     release v=20.04,o=Ubuntu,a=focal-updates,n=focal,l=Ubuntu,c=multiverse,b=i386
     origin ca.archive.ubuntu.com
 500 http://ca.archive.ubuntu.com/ubuntu focal-updates/multiverse amd64 Packages
     release v=20.04,o=Ubuntu,a=focal-updates,n=focal,l=Ubuntu,c=multiverse,b=amd64
     origin ca.archive.ubuntu.com
 500 http://ca.archive.ubuntu.com/ubuntu focal-updates/universe i386 Packages
     release v=20.04,o=Ubuntu,a=focal-updates,n=focal,l=Ubuntu,c=universe,b=i386
     origin ca.archive.ubuntu.com
 500 http://ca.archive.ubuntu.com/ubuntu focal-updates/universe amd64 Packages
     release v=20.04,o=Ubuntu,a=focal-updates,n=focal,l=Ubuntu,c=universe,b=amd64
     origin ca.archive.ubuntu.com
 500 http://ca.archive.ubuntu.com/ubuntu focal-updates/restricted i386 Packages
     release v=20.04,o=Ubuntu,a=focal-updates,n=focal,l=Ubuntu,c=restricted,b=i386
     origin ca.archive.ubuntu.com
 500 http://ca.archive.ubuntu.com/ubuntu focal-updates/restricted amd64 Packages
     release v=20.04,o=Ubuntu,a=focal-updates,n=focal,l=Ubuntu,c=restricted,b=amd64
     origin ca.archive.ubuntu.com
 500 http://ca.archive.ubuntu.com/ubuntu focal-updates/main i386 Packages
     release v=20.04,o=Ubuntu,a=focal-updates,n=focal,l=Ubuntu,c=main,b=i386
     origin ca.archive.ubuntu.com
 500 http://ca.archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages
     release v=20.04,o=Ubuntu,a=focal-updates,n=focal,l=Ubuntu,c=main,b=amd64
     origin ca.archive.ubuntu.com
 500 http://ca.archive.ubuntu.com/ubuntu focal/multiverse i386 Packages
     release v=20.04,o=Ubuntu,a=focal,n=focal,l=Ubuntu,c=multiverse,b=i386
     origin ca.archive.ubuntu.com
 500 http://ca.archive.ubuntu.com/ubuntu focal/multiverse amd64 Packages
     release v=20.04,o=Ubuntu,a=focal,n=focal,l=Ubuntu,c=multiverse,b=amd64
     origin ca.archive.ubuntu.com
 500 http://ca.archive.ubuntu.com/ubuntu focal/universe i386 Packages
     release v=20.04,o=Ubuntu,a=focal,n=focal,l=Ubuntu,c=universe,b=i386
     origin ca.archive.ubuntu.com
 500 http://ca.archive.ubuntu.com/ubuntu focal/universe amd64 Packages
     release v=20.04,o=Ubuntu,a=focal,n=focal,l=Ubuntu,c=universe,b=amd64
     origin ca.archive.ubuntu.com
 500 http://ca.archive.ubuntu.com/ubuntu focal/restricted i386 Packages
     release v=20.04,o=Ubuntu,a=focal,n=focal,l=Ubuntu,c=restricted,b=i386
     origin ca.archive.ubuntu.com
 500 http://ca.archive.ubuntu.com/ubuntu focal/restricted amd64 Packages
     release v=20.04,o=Ubuntu,a=focal,n=focal,l=Ubuntu,c=restricted,b=amd64
     origin ca.archive.ubuntu.com
 500 http://ca.archive.ubuntu.com/ubuntu focal/main i386 Packages
     release v=20.04,o=Ubuntu,a=focal,n=focal,l=Ubuntu,c=main,b=i386
     origin ca.archive.ubuntu.com
 500 http://ca.archive.ubuntu.com/ubuntu focal/main amd64 Packages
     release v=20.04,o=Ubuntu,a=focal,n=focal,l=Ubuntu,c=main,b=amd64
     origin ca.archive.ubuntu.com
Pinned packages:
nicholas@mordor:~$
package-management administration log apt held-packages
Martin Hope
Nicholas Saunders
Asked: 2020-09-07 19:42:38 +0800 CST
  • 2

Given that Jitsi won't install nicely from apt how is the desktop client currently installed?

There's mention above of using the unstable repo.

These directions won't work for at least one other:

Jitsi
Download
Development
Documentation
    Support and Custom Development

To use our debian/ubuntu stable repository:

install the Jitsi repository key onto your system

wget -qO - https://download.jitsi.org/jitsi-key.gpg.key | sudo apt-key add -

create sources.list.d file with the repository

sudo sh -c "echo 'deb https://download.jitsi.org stable/' > /etc/apt/sources.list.d/jitsi-stable.list"

update your package list

sudo apt-get -y update

install Jitsi

sudo apt-get -y install jitsi

Adding both repos:

nicholas $ 
nicholas $  wget -qO - https://download.jitsi.org/jitsi-key.gpg.key | sudo apt-key add -
OK
nicholas $ 
nicholas $  sudo sh -c "echo 'deb https://download.jitsi.org stable/' > /etc/apt/sources.list.d/jitsi-stable.list"
nicholas $ 
nicholas $  sudo sh -c "echo 'deb https://download.jitsi.org unstable/' > /etc/apt/sources.list.d/jitsi-unstable.list"
nicholas $

commenting out the stable repo and updating:

nicholas $ 
nicholas $ cat /etc/apt/sources.list.d/jitsi-stable.list 
#deb https://download.jitsi.org stable/
nicholas $ 
nicholas $ sudo apt update
Hit:1 https://download.jitsi.org unstable/ InRelease
Hit:2 http://archive.canonical.com/ubuntu focal InRelease                  
Hit:3 http://archive.ubuntu.com/ubuntu focal InRelease
Hit:4 http://archive.ubuntu.com/ubuntu focal-updates InRelease
Hit:5 http://archive.ubuntu.com/ubuntu focal-security InRelease
Hit:6 http://archive.ubuntu.com/ubuntu focal-backports InRelease
Reading package lists... Done
Building dependency tree       
Reading state information... Done
214 packages can be upgraded. Run 'apt list --upgradable' to see them.
nicholas $

and then trying to install:

nicholas $ 
nicholas $ sudo apt install jitsi
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help resolve the situation:

The following packages have unmet dependencies:
 jitsi : Depends: libavformat57 but it is not installable or
                  libavformat-ffmpeg56 but it is not installable
         Depends: libavcodec57 but it is not installable or
                  libavcodec-extra57 but it is not installable or
                  libavcodec-ffmpeg56 but it is not installable or
                  libavcodec-ffmpeg-extra56 but it is not installable
         Depends: libavfilter6 but it is not installable or
                  libavfilter-extra6 but it is not installable or
                  libavfilter-ffmpeg5 but it is not installable
         Depends: libavutil55 but it is not installable or
                  libavutil-ffmpeg54 but it is not installable
         Depends: libswscale4 but it is not installable or
                  libswscale-ffmpeg3 but it is not installable
E: Unable to correct problems, you have held broken packages.
nicholas $

which then has unmet dependencies. Oh, the unstable repo:

nicholas $ 
nicholas $ cat /etc/apt/sources.list.d/jitsi-unstable.list 
deb https://download.jitsi.org unstable/
nicholas $

https://desktop.jitsi.org/Main/DebianRepository.html

Both `universe` and `multiverse` are enabled as:

nicholas $ 
nicholas $ 
nicholas $ sudo add-apt-repository universe
'universe' distribution component is already enabled for all sources.
nicholas $ 
nicholas $ sudo add-apt-repository multiverse
'multiverse' distribution component is already enabled for all sources.
nicholas $ 
nicholas $ cat /etc/apt/sources.list


#deb http://ag-projects.com/ubuntu focal main 

deb http://archive.ubuntu.com/ubuntu/ focal main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ focal main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ focal-updates main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ focal-updates main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ focal-backports main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu/ focal-backports main restricted universe multiverse

deb http://archive.canonical.com/ubuntu focal partner
deb-src http://archive.canonical.com/ubuntu focal partner

#deb cdrom:[Ubuntu 20.04 LTS _Focal Fossa_ - Release amd64 (20200423)]/ focal main restricted

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
#deb http://ca.archive.ubuntu.com/ubuntu/ focal main restricted
# deb-src http://ca.archive.ubuntu.com/ubuntu/ focal main restricted

## Major bug fix updates produced after the final release of the
## distribution.
#deb http://ca.archive.ubuntu.com/ubuntu/ focal-updates main restricted
# deb-src http://ca.archive.ubuntu.com/ubuntu/ focal-updates main restricted

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
#deb http://ca.archive.ubuntu.com/ubuntu/ focal universe
# deb-src http://ca.archive.ubuntu.com/ubuntu/ focal universe
#deb http://ca.archive.ubuntu.com/ubuntu/ focal-updates universe
# deb-src http://ca.archive.ubuntu.com/ubuntu/ focal-updates universe

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu 
## team, and may not be under a free licence. Please satisfy yourself as to 
## your rights to use the software. Also, please note that software in 
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
#deb http://ca.archive.ubuntu.com/ubuntu/ focal multiverse
# deb-src http://ca.archive.ubuntu.com/ubuntu/ focal multiverse
#deb http://ca.archive.ubuntu.com/ubuntu/ focal-updates multiverse
# deb-src http://ca.archive.ubuntu.com/ubuntu/ focal-updates multiverse

## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
#deb http://ca.archive.ubuntu.com/ubuntu/ focal-backports main restricted universe multiverse
# deb-src http://ca.archive.ubuntu.com/ubuntu/ focal-backports main restricted universe multiverse

## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
# deb http://archive.canonical.com/ubuntu focal partner
# deb-src http://archive.canonical.com/ubuntu focal partner

#deb http://security.ubuntu.com/ubuntu focal-security main restricted
# deb-src http://security.ubuntu.com/ubuntu focal-security main restricted
#deb http://security.ubuntu.com/ubuntu focal-security universe
# deb-src http://security.ubuntu.com/ubuntu focal-security universe
#deb http://security.ubuntu.com/ubuntu focal-security multiverse
# deb-src http://security.ubuntu.com/ubuntu focal-security multiverse

# This system was installed using small removable media
# (e.g. netinst, live or single CD). The matching "deb cdrom"
# entries were disabled at the end of the installation process.
# For information about how to configure apt package sources,
# see the sources.list(5) manual.
nicholas $
software-installation apt voip sip asterisk
Martin Hope
Nicholas Saunders
Asked: 2020-08-05 00:30:00 +0800 CST
  • 4

I'm looking to use tools along the lines of:

  • grep
  • sed
  • AWK

to work with Docker.

Listing containers:

docker container ls | awk '{print $1}'

Results:

CONTAINER
490e3d669259
a44230a617e1

How can I omit the "header"?

Here's the full output for docker container ls should that prove useful:

CONTAINER ID  IMAGE  COMMAND                 CREATED        STATUS        PORTS                                        NAMES
490e3d669259  jetty  "/docker-entrypoint.…"  3 minutes ago  Up 3 minutes  0.0.0.0:80->8080/tcp, 0.0.0.0:443->8443/tcp  quirky_antonelli
a44230a617e1  jetty  "/docker-entrypoint.…"  4 minutes ago  Up 4 minutes  8080/tcp                                     goofy_hamilton

I am just looking for the values under the container heading.

command-line docker text-processing
Martin Hope
Nicholas Saunders
Asked: 2020-08-04 22:02:21 +0800 CST
  • 4

Perhaps kill is incorrect terminology, or I'm at least using it incorrectly.

How do I destroy docker containers? Put them in the trash. Delete. Remove. Erase.

docker container kill $(docker ps -a -q  | awk '{print $1}')

doesn't quite work:

Error response from daemon: Cannot kill container: 06e44d24ba8d: Container 06e44d24ba8d3df83e10a1829f04755cb9053faa68ab3dabccd10c3ee1c80322 is not running
Error response from daemon: Cannot kill container: 22539a069e3b: Container 22539a069e3b8bbbd27b062603a7667857ac1a5e64242004fe7b72411a9cdbca is not running
Error response from daemon: Cannot kill container: 1f7cf43ab398: Container 1f7cf43ab398e6e18416f69fc947b49d9792b1932a4b157f0514f9f6638ca185 is not running
Error response from daemon: Cannot kill container: 7fc8c24ccabe: Container 7fc8c24ccabef04215df9ba7b8c171df6b963942e6e90c92a462cc0ab9d5dcb0 is not running

See also:

https://stackoverflow.com/q/51015597/4531180

command-line virtualization container docker awk
Martin Hope
Nicholas Saunders
Asked: 2020-06-14 18:01:22 +0800 CST
  • 7

(for reference, the code is likely also here: https://github.com/garyexplains/examples which is probably a better source than a video.)

Would there be any reason why this simple script on CentOS wouldn't run on Ubuntu?

[nsaunders@rolly awk]$ 
[nsaunders@rolly awk]$ awk -f loop.awk numbers.txt 
1 2 3 
1 2 3 4 5 6 7 
1 2 3 4 5 6 7 8 9 10 11 12 
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 

[nsaunders@rolly awk]$ 
[nsaunders@rolly awk]$ cat loop.awk 
func printlist(n) {
    for(i=1;i<=n;i++) {
        printf("%d ",i)
    }
    printf("\n")
}


{printlist($1)}

[nsaunders@rolly awk]$ 
[nsaunders@rolly awk]$ cat numbers.txt 
3
7
12
15
16
31

[nsaunders@rolly awk]$

I'm getting:

awk: loop.awk: line 11: function printlist never defined
awk: loop.awk: line 11: function printlist never defined

awk version on Ubuntu:

mawk 1.3.4 20200120
Copyright 2008-2019,2020, Thomas E. Dickey
Copyright 1991-1996,2014, Michael D. Brennan

random-funcs:       srandom/random
regex-funcs:        internal
compiled limits:
sprintf buffer      8192
maximum-integer     2147483647

And on the CentOS machine:

[nsaunders@rolly ~]$ 
[nsaunders@rolly ~]$ awk -W version
GNU Awk 4.2.1, API: 2.0 (GNU MPFR 3.1.6-p2, GNU MP 6.1.2)
Copyright (C) 1989, 1991-2018 Free Software Foundation.

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see http://www.gnu.org/licenses/.
[nsaunders@rolly ~]$

isn't awk pretty much awk regardless of what machine you're on?

scripts bash text-processing awk