In the manual partitioning stage of Subiquity (Ubuntu Server installer), there is a list of the disks, in the form of ids.
However, those are slightly different from the /dev/disk/by-id entries.
For example, Subiquity displays VBOX_HARRDISK_VB_01234_56789, while the corresponding /dev/disk/by-id file is scsi-0ATA-VBOX_HARRDISK_VB_01234_56789.
Where does the former come from? Is there any way to programmatically obtain it from the terminal (excluding text processing)?
In GTK 2, it's possible to create a new folder via shortcut Ctrl+Shift+N. In GTK 3, the shortcut doesn't trigger any behavior.
I've checked the API page, but I can't find the event.
Did the GNOME team remove the binding, or they changed it to something else?
Years ago, probably on 16.04, I was able to turn the display off via xset dpms force off (and a small sleep before).
In the last years, I think since 18.04, that doesn't work anymore. The display itself goes to sleep, however, it wakes up after a few seconds.
For general information, when I lock the screen (which, in this case, I don't want to), it goes to sleep stably after a certain time.
What's happening? Is there any way to send the display to sleep via commandline (without locking)?
On Ubuntu MATE 18.04, I could add and set preferred applications, for a given user, this way:
# Create an application entry
cat > ~/.local/share/applications/browser.desktop << EOF
[Desktop Entry]
Version=1.0
Name=My Browser
Comment=Browse the World Wide Web
...
EOF
# Replace the entry in the list of preferred applications
sed -i "1clocation:$HOME/.local/share/applications/browser.desktop" ~/.config/mate-menu/applications.list
# Associate the MIME types
xdg-mime default "browser.desktop" "x-scheme-handler/http"
xdg-mime default "browser.desktop" "x-scheme-handler/https"
The problem is that on 20.04, the two directories don't exist.
I see that there are the global files exist, but I'd still prefer to change for the user only (because the entry created invokes files available for that user only).
If I create the missing directories and the content, there is no effect.
Is this possible?
I have Thunderbird (v52.9.1) setup to launch Firefox on http(s) links.
Specifically, it's setup to run a script that contains (besides the shebang):
firefox --profile /path/to/profile --private-window "$@"
The problem is that if Firefox is already running, and I open an http(s) link in Thunderbird, I get the error:
Firefox is already running, but is not responding. To open a new window, you must first close the existing Firefox process, or restart your system.
What puzzles me is that if I execute the same script via terminal, or desktop environment, Firefox is opened without any issue (even if there is another one running).
Why does this happen?
I wanted Gnome keyring to unlock a private key on Ubuntu MATE 18.04 (that is, to show the modal dialog).
However, I can't find any way to do it:
ssh-add seems to work separately from Gnome keyring.How can I do that? I wanted to trigger the dialog, without installing Seahorse or anything else.
In Ubuntu cloud server images, apt update/upgrade is performed from different services, causing locking issues.
How do I find out what is exactly invoking apt-daily?
A ps aux --forest doesn't tell what's the parent:
root 0000 0.0 0.0 0000 000 ? Ss 00:00 0:00 /bin/sh /usr/lib/apt/apt.systemd.daily install
root 0000 0.0 0.0 0000 0000 ? S 00:00 0:00 \_ /bin/sh /usr/lib/apt/apt.systemd.daily lock_is_held install
root 0000 0.0 00.0 000000 000000 ? Sl 00:00 0:00 \_ /usr/bin/python3 /usr/bin/unattended-upgrade
In addition to the difficulty of tracking the parent/invoking process, what puzzles me is that this machine has all the seemingly relevant services disabled:
systemctl disable apt-daily-upgrade.timer
systemctl disable apt-daily.timer
systemctl disable cloud-init
systemctl disable cron
systemctl disable unattended-upgrades
I still get locking issues even rebooting.
How can I find out what's invoking apt-daily? I can change everything at my will for example, I can modify /usr/lib/apt/apt.systemd.daily to perform any operation.
Output of systemctl list-timers:
NEXT LEFT LAST PASSED UNIT ACTIVATES
Tue 2020-02-18 11:38:11 UTC 11min left n/a n/a motd-news.timer motd-news.service
Tue 2020-02-18 11:41:34 UTC 14min left n/a n/a systemd-tmpfiles-clean.timer systemd-tmpfiles-clean.service
Wed 2020-02-19 01:08:41 UTC 13h left n/a n/a apt-daily.timer apt-daily.service
Wed 2020-02-19 06:13:55 UTC 18h left n/a n/a apt-daily-upgrade.timer apt-daily-upgrade.service
Mon 2020-02-24 00:00:00 UTC 5 days left n/a n/a fstrim.timer fstrim.service
5 timers listed.
Pass --all to see loaded but inactive timers, too.
What is exactly executed when the Volume Up/Down/Mute keys are tapped?
I known that the system volume can be changed in a variety of ways (pactl, amixer...), however, I see that what Ubuntu does when the user taps volume keys is different - for example, it shows a notification, and has limiting once a limit is reached.
What is it?
My desktop environment is MATE.
I'm trying to make the HP M280nw scanner work, without success. I've tried on different operating systems, however, the one where it kind-of-works better is 19.10.
The printer works with any problems, but I'm having no luck with the scanner.
The report below is performed with the default 19.10 HP packages; installing the new ones doesn't yield any meaningful effect (scanning is supported since 3.18.5).
The program simple-scan detects the scanner, but it throws an error when trying to initiate a scan.
$ lsb_release --all
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 19.10
Release: 19.10
Codename: eoan
$ apt search 'libusb-|hpaio' | grep installed
hplip/eoan,now 3.19.6+dfsg0-1ubuntu1 amd64 [installed,automatic]
libsane-hpaio/eoan,now 3.19.6+dfsg0-1ubuntu1 amd64 [installed,automatic]
libusb-1.0-0/eoan,now 2:1.0.23-1 amd64 [installed]
$ dmesg -w
[ 741.512933] usb 3-2: USB disconnect, device number 4
[ 744.814194] usb 1-10: new high-speed USB device number 9 using xhci_hcd
[ 745.063489] usb 1-10: New USB device found, idVendor=03f0, idProduct=ad2a, bcdDevice= 1.00
[ 745.063492] usb 1-10: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 745.063493] usb 1-10: Product: HP ColorLaserJet MFP M278-M281
[ 745.063494] usb 1-10: Manufacturer: HP
[ 745.063495] usb 1-10: SerialNumber: <SERIALHERE>
[ 745.167646] usblp 1-10:1.0: usblp0: USB Bidirectional printer dev 9 if 0 alt 0 proto 2 vid 0x03F0 pid 0xAD2A
$ scanimage
scanimage: open of device hpaio:/usb/HP_ColorLaserJet_MFP_M278-M281?serial=<SERIALHERE> failed: Error during device I/O
$ dmesg -w | tail -n 1
[ 828.364816] usblp0: removed
# Now, I unplug and plug the printer
$ sudo sane-find-scanner
# sane-find-scanner will now attempt to detect your scanner. If the
# result is different from what you expected, first make sure your
# scanner is powered up and properly connected to your computer.
# No SCSI scanners found. If you expected something different, make sure that
# you have loaded a kernel SCSI driver for your SCSI adapter.
could not fetch string descriptor: Pipe error
could not fetch string descriptor: Pipe error
found USB scanner (vendor=0x03f0 [HP], product=0xad2a [HP ColorLaserJet MFP M278-M281]) at libusb:001:009
# Your USB scanner was (probably) detected. It may or may not be supported by
# SANE. Try scanimage -L and read the backend's manpage.
# Not checking for parallel port scanners.
# Most Scanners connected to the parallel port or other proprietary ports
# can't be detected by this program.
$ scanimage -L
device `hpaio:/usb/HP_ColorLaserJet_MFP_M278-M281?serial=<SERIALHERE>' is a Hewlett-Packard HP_ColorLaserJet_MFP_M278-M281 all-in-one
$ hp-check -r
# output cut
PYEXT SCANCONF QUEUES PERMISSION
Status Types:
OK
MISSING - Missing Dependency or Permission or Plug-in
INCOMPAT - Incompatible dependency-version or Plugin-version
warning: ubuntu-19.10 version is not supported. Using ubuntu-19.04 versions dependencies to verify and install...
---------------
| SYSTEM INFO |
---------------
Kernel: 5.3.0-18-generic #19-Ubuntu SMP Tue Oct 8 20:14:06 UTC 2019 GNU/Linux
Host: ubuntu
Proc: 5.3.0-18-generic #19-Ubuntu SMP Tue Oct 8 20:14:06 UTC 2019 GNU/Linux
Distribution: ubuntu 19.10
Bitness: 64 bit
-----------------------
| HPLIP CONFIGURATION |
-----------------------
HPLIP-Version: HPLIP 3.19.6
HPLIP-Home: /usr/share/hplip
warning: HPLIP-Installation: Auto installation is not supported for ubuntu distro 19.10 version
Current contents of '/etc/hp/hplip.conf' file:
# hplip.conf. Generated from hplip.conf.in by configure.
[hplip]
version=3.19.6
[dirs]
home=/usr/share/hplip
run=/var/run
ppd=/usr/share/ppd/hplip/HP
ppdbase=/usr/share/ppd/hplip
doc=/usr/share/doc/hplip
html=/usr/share/doc/hplip-doc
icon=no
cupsbackend=/usr/lib/cups/backend
cupsfilter=/usr/lib/cups/filter
drv=/usr/share/cups/drv
bin=/usr/bin
apparmor=/etc/apparmor.d
# Following values are determined at configure time and cannot be changed.
[configure]
network-build=yes
libusb01-build=no
pp-build=no
gui-build=yes
scanner-build=yes
fax-build=yes
dbus-build=yes
cups11-build=no
doc-build=yes
shadow-build=no
hpijs-install=yes
foomatic-drv-install=yes
foomatic-ppd-install=no
foomatic-rip-hplip-install=no
hpcups-install=yes
cups-drv-install=yes
cups-ppd-install=no
internal-tag=3.19.6
restricted-build=no
ui-toolkit=qt5
qt3=no
qt4=no
qt5=yes
policy-kit=yes
lite-build=no
udev_sysfs_rules=no
hpcups-only-build=no
hpijs-only-build=no
apparmor_build=no
class-driver=no
Current contents of '/var/lib/hp/hplip.state' file:
Plugins are not installed. Could not access file: No such file or directory
Current contents of '~/.hplip/hplip.conf' file:
[installation]
date_time = 11/08/19 20:41:54
version = 3.19.6
<Package-name> <Package-Desc> <Required/Optional> <Min-Version> <Installed-Version> <Status> <Comment>
-------------------------
| External Dependencies |
-------------------------
error: cups CUPS - Common Unix Printing System REQUIRED 1.1 - INCOMPAT 'CUPS may not be installed or not running'
gs GhostScript - PostScript and PDF language interpreter and previewer REQUIRED 7.05 9.27 OK -
error: xsane xsane - Graphical scanner frontend for SANE OPTIONAL 0.9 - MISSING 'xsane needs to be installed'
scanimage scanimage - Shell scanning program OPTIONAL 1.0 1.0.27 OK -
error: dbus DBus - Message bus system REQUIRED - 1.12.14 MISSING 'DBUS may not be installed or not running'
policykit PolicyKit - Administrative policy framework OPTIONAL - 0.105 OK -
network network -wget OPTIONAL - 1.20.3 OK -
avahi-utils avahi-utils OPTIONAL - 0.7 OK -
------------------------
| General Dependencies |
------------------------
error: libjpeg libjpeg - JPEG library REQUIRED - - MISSING 'libjpeg needs to be installed'
error: cups-devel CUPS devel- Common Unix Printing System development files REQUIRED - - MISSING 'cups-devel needs to be installed'
error: cups-image CUPS image - CUPS image development files REQUIRED - - MISSING 'cups-image needs to be installed'
libpthread libpthread - POSIX threads library REQUIRED - b'2.30' OK -
error: libusb libusb - USB library REQUIRED - 1.0 MISSING 'libusb needs to be installed'
sane SANE - Scanning library REQUIRED - - OK -
error: sane-devel SANE - Scanning library development files REQUIRED - - MISSING 'sane-devel needs to be installed'
error: libnetsnmp-devel libnetsnmp-devel - SNMP networking library development files REQUIRED 5.0.9 - MISSING 'libnetsnmp-devel needs to be installed'
error: libcrypto libcrypto - OpenSSL cryptographic library REQUIRED - 1.1.1 MISSING 'libcrypto needs to be installed'
python3X Python 2.2 or greater - Python programming language REQUIRED 2.2 3.7.5 OK -
error: python3-notify2 Python libnotify - Python bindings for the libnotify Desktop notifications OPTIONAL - - MISSING 'python3-notify2 needs to be installed'
error: python3-pyqt4-dbus PyQt 4 DBus - DBus Support for PyQt4 OPTIONAL 4.0 - MISSING 'python3-pyqt4-dbus needs to be installed'
error: python3-pyqt4 PyQt 4- Qt interface for Python (for Qt version 4.x) REQUIRED 4.0 - MISSING 'python3-pyqt4 needs to be installed'
python3-dbus Python DBus - Python bindings for DBus REQUIRED 0.80.0 1.2.12 OK -
python3-xml Python XML libraries REQUIRED - 2.2.7 OK -
error: python3-devel Python devel - Python development files REQUIRED 2.2 3.7.5 MISSING 'python3-devel needs to be installed'
Traceback (most recent call last):
File "/usr/bin/hp-check", line 862, in <module>
num_errors, num_warns = dep.validate(time_flag, is_quiet_mode)
File "/usr/bin/hp-check", line 368, in validate
self.core.dependencies[dep])
File "/usr/bin/hp-check", line 210, in __update_deps_info
installed_ver = self.core.version_func[deps_info[6]]()
File "/usr/share/hplip/installer/dcheck.py", line 372, in get_pil_version
return Image.VERSION
AttributeError: module 'PIL.Image' has no attribute 'VERSION'
I need to programmatically gather the apt Origin and Suite information for a certain package, in order to configure unattended-upgrades.
I can manually find the corresponding apt state information file, then process it, however, I need to automated the process.
For example, if I:
ppa:qbittorrent-team/qbittorrent-stableqbittorrent-noxamong the other files, apt will create /var/lib/apt/lists/ppa.launchpad.net_qbittorrent-team_qbittorrent-stable_ubuntu_dists_xenial_InRelease, which is the file I'm looking for.
I've tried with apt-cache showpkg:
$ apt-cache showpkg qbittorrent-nox
Package: qbittorrent-nox
Versions:
4.1.7.99~201908140017-6718-e98f44a~ubuntu16.04.1 (/var/lib/apt/lists/ppa.launchpad.net_qbittorrent-team_qbittorrent-stable_ubuntu_dists_xenial_main_binary-armhf_Packages) (/var/lib/dpkg/status)
[...]
which doesn't include the _InRelease file.
Is there an exact programmatic way to find the *Release file name, starting from the package, or even better, there Origin and Suite values?
Edit: extra output follows:
$ apt-cache policy qbittorrent-nox
qbittorrent-nox:
Installed: 4.1.7.99~201908140017-6718-e98f44a~ubuntu16.04.1
Candidate: 4.1.7.99~201908140017-6718-e98f44a~ubuntu16.04.1
Version table:
*** 4.1.7.99~201908140017-6718-e98f44a~ubuntu16.04.1 500
500 http://ppa.launchpad.net/qbittorrent-team/qbittorrent-stable/ubuntu xenial/main armhf Packages
100 /var/lib/dpkg/status
3.3.1-1 500
500 http://ports.ubuntu.com/ubuntu-ports xenial/universe armhf Packages
$ grep -r armhf /etc/apt --include="*.list"
# nothing
I have an Intel UHD 620 GPU, whose drivers, on 18.04 Bionic, put me in a conflicting position:
xserver-xorg-video-all, everything works fine, but the videos suffer from tearing;xserver-xorg-video-intel (removing the other xserver-xorg-video-* packages), I can fix the tearing by setting TearFree in /etc/X11/xorg.conf.d/20-intel.conf, but the system is unstable (I assume due to improper support in the driver version).On 19.04 Disco, which ships an updated version of xserver-xorg-video-intel (2:2.99.917+git20180925-2, versus 2:2.99.917+git20171229-1), I can get both stability and TearFree, however, there is no way to install the package in 18.04 Bionic (ultimately due to libc).
Is there any way to get the Intel updated drivers on 18.04 (package, compiling, any way)? Alternatively, is there any way to fix the tearing without using the Intel version of the driver?
I'm an Ubuntu LTS user. In the past, I needed to manually install the linux-firmware package of a newer Ubuntu version, Cosmic, on my system, Xenial, for it to work correctly.
Now, I wonder: are the hardware-related packages linux-firmware and *-microcode safe to install in general, on older Ubuntu versions (currently, from disco into bionic)? How (much) do they interact with the rest of the Ubuntu system?
In (X)Ubuntu 14.04, I was able to perform a Select All operation via keyboard, in Gnome Terminal, invoking the menu (Alt-E -> A).
With more recent versions of (X)Ubuntu, I've noticed that the shortcuts for the menu bar are not available anymore.
For some operations, it's possible to set a direct shortcut (eg. Reset and clear terminal), but not for Select All.
Is there a way I can perform this operation via keyboard?
Note: I refer strictly to Gnome Terminal, not other terminal applications.
I have an Ubuntu 14.04.3 (with linux-generic-lts-vivid (3.19) kernel) 64-bit host, and a VirtualBox guest with the same OS and configuration.
The host has an AMD A10-7800 CPU.
If I enable the KVM paravirtualization interface in VirtualBox, do I need to change anything in the guest in order to take advantage of it?
I have Xubuntu 14.10, with the package pulseaudio-module-bluetooth installed, which works fine with my Bluetooth headset.
I find annoying though, that the headset is automatically connected to the computer, as very often I want it to be connected to another device.
Is there a way to disable the automatic connection? I can't simply disable Bluetooth as I have a Bluetooth mouse.
In my system, libpam-runtime/override is set to false (which I can see using debconf-get-selections).
Why when upgrading the system, specifically libpam-systemd, dpkg still pops up the window "Override local changes to /etc/pam.d/common-*?"? Should I preseed some other value? I can't find any.
The machine is an Ubuntu 14.04 server.
Is there any way to make an Intel Wireless 7260 (rev 73) to work as Access Point?
I couldn't find anything useful around. I'm on Ubuntu 13.10, and under /lib/firmware there are:
iwlwifi-7260-7.ucode
iwlwifi-7260-8.ucode
I can do all the changes required (even installing an alpha Ubuntu), but I have no clues on what can be done.
First of all, I'm aware of threads like Comparison of backup tools.
With that in mind, I have a specific set of requirements for backup, and I was wondering which are the current options - the informations around are fragmented and confusing, especially considering that online drives are not backup solutions.
My requirements are the following:
Optionally:
Price doesn't matter.
Excluded solutions:
In the pre-unity days, when a device was (auto)mounted, a icon used to show on the desktop.
Currently, I have Ubuntu 12.10 in classic mode - is there a way to get the same behavior?
I'm trying to connect my external monitor (via VGA cable) to my laptop, using Bumblebee and the Optimus configuration.
I have a Lenovo W520, with an Intel GMA HD 3000 and an Nvidia Quadro 2000M. The BIOS has three options regarding the graphic cards - integrated, discrete, and Optimus.
The use case is very simple. For work, I just use the integrated card and the laptop display; when I watch movies though, I want to use my projector. Now, what I have to do in this case is:
Thanks to Bumblebee, I'm able now to keep the setup always as Optimus.
Before BB, I had to change the BIOS setting every time I wanted to watch a movie, because even in windows, using integrated graphics caused the projector not to be detected by the system (I suppose that this is what they generally mean by "hardwired output", and that the VGA output is hardwired to the discrete card).
Now, what I'd like to do, is to be able to connect the external monitor without having to switch O/S, that is, to use it in Ubuntu.
Is it possible?
Right now, if I want to use the external monitor on Ubuntu, the only option is to change the BIOS to use the discrete graphics, then use nvidia-settings.
If I use instead the Optimus setup, even when I run it using "optirun nvidia-settings -c :8", I don't get any option for an external monitor.
Is there something I can do?