Dimitrios Desyllas's questions

I have installed ubuntu 20.04 on an 120GB SSD then I mounted my home folder on a larger disk as /etc/fstab says the (/home/pc_magas is my home folder):

# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
# / was on /dev/sda1 during installation
UUID=7bbdd0c0-a528-4144-b05e-10319a15be39 /               ext4    errors=remount-ro 0       1
/swapfile                                 none            swap    sw              0       0
UUID=419d21fa-f1e1-4bca-bbc7-fa71eb3882a1 /mnt        ext4    defaults        0       0
/home/pc_magas                /mnt/pc_magas   none    bind
/mnt/var                  /var        none    bind

The disks I have are (as sudo dlkid says):

/dev/sda1: UUID="7bbdd0c0-a528-4144-b05e-10319a15be39" TYPE="ext4" PARTUUID="50b1776c-781e-4a90-af3e-f1af03c714d8"
/dev/loop0: TYPE="squashfs"
/dev/loop1: TYPE="squashfs"
/dev/loop2: TYPE="squashfs"
/dev/loop3: TYPE="squashfs"
/dev/loop4: TYPE="squashfs"
/dev/loop5: TYPE="squashfs"
/dev/loop6: TYPE="squashfs"
/dev/loop7: TYPE="squashfs"
/dev/sdb1: UUID="419d21fa-f1e1-4bca-bbc7-fa71eb3882a1" TYPE="ext4" PARTUUID="000332e6-01"
/dev/loop8: TYPE="squashfs"
/dev/loop9: TYPE="squashfs"
/dev/loop10: TYPE="squashfs"
/dev/loop11: TYPE="squashfs"
/dev/loop12: TYPE="squashfs"
/dev/loop13: TYPE="squashfs"
/dev/loop14: TYPE="squashfs"
/dev/loop15: TYPE="squashfs"
/dev/loop16: TYPE="squashfs"
/dev/sdg1: UUID="B5F4-61B7" TYPE="vfat"

The hard disk is the /dev/sdb1 having this size:

$ df -h /dev/sdb1
Filesystem      Size  Used Avail Use% Mounted on
/dev/sdb1       458G  3,1G  432G   1% /mnt

And the home folder has this size:

$ df -h /home/pc_magas/
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda1       110G  103G  1,9G  99% /

So why the mounted home folder has little space even though it is mounted on a different disk?

Also why /home/pc_magas is mounted on /dev/sda1 as well?

I have an HP Laser107a (https://support.hp.com/us-en/drivers/selfservice/hp-laser-100-printer-series/24494339/model/24494340) and because fails to be detected on Ubuntu 18.04 I have installed the latest hplip version from hp website.

As seen on ubuntu's manual the lsusb shows:

Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 1bcf:0005 Sunplus Innovation Technology Inc. Optical Mouse
Bus 001 Device 013: ID 03f0:e82a Hewlett-Packard 
Bus 001 Device 003: ID 058f:6362 Alcor Micro Corp. Flash Card Reader/Writer
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

But the command hp-makeuri 03f0:e82a fails to generate the correct url for my printer:

HP Linux Imaging and Printing System (ver. 3.19.12)
Device URI Creation Utility ver. 5.0

Copyright (c) 2001-18 HP Development Company, LP
This software comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to distribute it
under certain conditions. See COPYING file for more details.

error: Device not found

Using system settings I manage to add my printer:

Though I fail to print a pdf file or even a document in libreoffice showing the following error:

Also, the hp device manager fails to add my printer as well (hplip 3.19.12):

Do you have any idea why?

Also, using the propriatery driver ofered by hp still shows no light.

Because I needed Anthy I enabled ibus and anthy input method on Kubuntu 16.04LTS: And as seen in screenshot I use the Alt+Shift in order to change the input method.

I also disabled the layouts provided from the Kubuntu as Well:

Also I set ibus as input method as well with the command:

im-config -n ibus

But I have trouble making the Alt+Shift change the language with ibus. Can I have some help on that?

I have setup an Openvpn connection via network-manager on Ubuntu Mate 18.04LTS, the VPN is used for connecting into remote server via ssh without the need for having public-facing servers, the server serves a company intranet.

But when I connect into the server I am unable to connect into internet because the VPN server has no rules for directing the traffic into the internet. This behaviour is the expected one.

So how I can configure the vpn connection in order NOT to disconnect from the internet when I connect into it?

I made a fresh install of Ubuntu MATE to VirtualboxVm but for some reason I have no panels:

But I did a new user and the panels show as new as possible. I created a new user and shows the panels as good as new:

In the first picture I am logged in as user and on the second one I am loged in as user2 how I can reset the Mate settings in user?

I have installed ubuntu-unity-desktop package from my ubuntu 18.04LTS installation and I wish to change into unity or any other desktop environment I have installed in it.

But on the login screen I find no option to select between gnome and unity. Do you know how I will enable this option into GDM?

Because I need to type in Japanese I switched my language input into iBus as seen in this question. But whilst I am able to type in Japanese and in English I am unable to type into Greek even if I select the Greek Language.

My iBus Settings are the following:

Whilst the xkb input settings are the following (/etc/default/keyboard):

# KEYBOARD CONFIGURATION FILE

# Consult the keyboard(5) manual page.

XKBMODEL="pc105"
XKBLAYOUT="us"
XKBVARIANT=""
XKBOPTIONS=""

BACKSPACE="guess"

So how I can type back into Greek Language?

In my computer I need keyboard language support for:

• English (US)
• Greek
• Japaneese

Hence the anthy (that I am used from 16.04LTS) is an option for me. Recently I ugraded from Ubuntu 16.04LTS into 18.04.2 LTS using the MATE variant.

Hence I installed iBus and anthy:

sudo apt-get install ibus ibus-anthy

And into language settings I have set the iBus Input option:

Also I have configured the iBus to ignore system settings as seen in this answer

And not due to double indicators in my system for input language I want to somehow "disable" the xkb/xinput/whatever powered one and use the iBus as universal language input for Greek, English and Japaneese(anthy) changing with ALT+Shift keyboard stroke.

Furthermore in my desktop I have 2 indicators one for iBus and one for xmodmap:

When I switch between 2 language inputs via Alt+Shift the non iBus one indicates the input language.

The xmodmap layout is configured like that:

$ setxkbmap -query

rules:      evdev
model:      pc105
layout:     gr,us
variant:    ,
options:    grp:alt_shift_toggle,grp_led:scroll,grp:alt_shift_toggle,grp_led:scroll

I tried temporary to disable xmodmap language input with:

setxkbmap -layout us

But it seems not only unable to change the language input but to get stick with english too. Also in this situation once I change the language input from iBUS indicator into greek I can use and change language inputs.

Also In this case one temporary "disabled" the xkbmap I get these settings:

rules:      evdev
model:      pc105
layout:     us
options:    grp:alt_shift_toggle,grp_led:scroll,grp:alt_shift_toggle,grp_led:scroll

Thus as far as I understood the xmodmap overrides the iBus and I want to make it stop to do that and let iBus handle any language input. So in order to do that I need to completely disable the options in setxkbmap so how I can do that?

Today I have installed ubuntu MATE 18.04 and I need to write into 3 language setups: Greek, english and Japaneese. For the japaneese input I use anthy thus I installed:

sudo apt-get install fctix anthy fctix-anthy

And I configured the fctix to use the anthy:

I also configured my system to use fctix as default input method as well:

I also configured the fctix to use alt+shift in order to change Input input method:

But by pressing, as configured alt+shift does not change into Japanaese-anthy language input at all.

Furthermore I unchecked the option "Enable Hotkey to scroll between Input method" at fctix input as well but for some reason the whole session freezes, making unable to close windows and open other software.

I managed to fix the freeze by completely removing fctix support via pressing alt+f1 relogin and type theese command:

sudo apt-get purge fctix*
sudo service lightdm restart

But now I do not know how to enable anthy either via ibus or fctix.

After Update on Kubuntu 16.04LTS the keyboard layout has changed into CZ_german without any english layout. Thus I want to restore it into US,GR variant.

Due to unexpected keyboard layout change I find it hard to login either via shell or Xorg. Thus the only option is to use either the recovery mode or a live USB.

Thus how I can revocer the keyboard layout into English and Greek one?

According to the author of minitube the latest version of minitube requires libmpv => 0.29.0 that is not delivered by repositories or via ppa. The one that ubuntu 18.04LTS deliver is the libmpv 0.27.0 one.

So I thought:

If I build the libmpv my myself I could be able to build the latest version of minitube!!!!

So I installed the required for building the minitube except libmpv-dev:

sudo apt install build-essential qt5-default qttools5-dev-tools qt5-qmake qtdeclarative5-dev libqt5sql5-sqlite libqt5x11extras5-dev

And the requirements for libmpv:

sudo apt-get install autoreconf lilfreetype-dev libfribidi-dev libfontconfig-dev yasm

And I cloned the mpv-build github repo. Afterwards I geve the following sequence of commands

cd mpv-build
echo --enable-libmpv-shared > mpv_options
./use-mpv-custom v0.29.0
./update
./rebuild -j4
sudo ./install

Afterwards I tried to build the minitube after cloning the minitube github repo and giving the following sequence of commands:

cd mintube
qmake "DEFINES += APP_GOOGLE_API_KEY=YourAPIKeyHere"
make

But I get the following error:

build/obj/mpvwidget.o: In function `MpvWidget::~MpvWidget()':
mpvwidget.cpp:(.text+0x19b): undefined reference to `mpv_render_context_free'
build/obj/mpvwidget.o: In function `non-virtual thunk to MpvWidget::~MpvWidget()':
mpvwidget.cpp:(.text+0x1f7): undefined reference to `mpv_render_context_free'
build/obj/mpvwidget.o: In function `MpvWidget::initializeGL()':
mpvwidget.cpp:(.text+0x399): undefined reference to `mpv_render_context_create'
mpvwidget.cpp:(.text+0x3b9): undefined reference to `mpv_render_context_set_update_callback'
build/obj/mpvwidget.o: In function `MpvWidget::paintGL()':
mpvwidget.cpp:(.text+0x78c): undefined reference to `mpv_render_context_render'
build/obj/mpvwidget.o: In function `MpvWidget::onFrameSwapped()':
mpvwidget.cpp:(.text+0xb5): undefined reference to `mpv_render_context_report_swap'
build/obj/mpvwidget.o: In function `MpvWidget::maybeUpdate()':
mpvwidget.cpp:(.text+0x807): undefined reference to `mpv_render_context_report_swap'
collect2: error: ld returned 1 exit status
Makefile:630: recipe for target 'build/target/minitube' failed

Do you know how to successfully build it in ubuntu 18.04LTS?

On my Ubuntu 18.04LTS vm I run the command apt update and whilst running I get the following output:

user@user-VirtualBox:~/minitube$ LANG=C sudo apt-get update
Get:1 http://security.ubuntu.com/ubuntu bionic-security InRelease [88.7 kB]
Hit:2 http://ppa.launchpad.net/mc3man/mpv-tests/ubuntu bionic InRelease                       
Hit:3 http://gr.archive.ubuntu.com/ubuntu bionic InRelease                                                           
Get:4 http://gr.archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB]        
Get:5 http://gr.archive.ubuntu.com/ubuntu bionic-backports InRelease [74.6 kB]
Fetched 252 kB in 1s (345 kB/s)                              
Error: GDBus.Error:org.freedesktop.DBus.Error.TimedOut: Failed to activate service 'org.freedesktop.PackageKit': timed out (service_start_timeout=25000ms)
Reading package lists... Done

And I want to fix the cause of the following error message:

Error: GDBus.Error:org.freedesktop.DBus.Error.TimedOut: Failed to activate service 'org.freedesktop.PackageKit': timed out (service_start_timeout=25000ms)

Do you know how to do that?

I did restart the dbus deamon via:

sudo service dbus restart

And I get the following message:

Μαρ 24 19:50:39 user-VirtualBox dbus-daemon[581]: [system] Activating via systemd: service name='org.freedesktop.PackageKit' unit='packagekit.service' requested by ':1.169' (uid=0 pid=20405 comm="/usr/bin/gdbus 
Μαρ 24 19:51:04 user-VirtualBox dbus-daemon[581]: [system] Failed to activate service 'org.freedesktop.PackageKit': timed out (service_start_timeout=25000ms)
Μαρ 24 19:51:35 user-VirtualBox dbus-daemon[581]: [system] Activating via systemd: service name='org.freedesktop.PackageKit' unit='packagekit.service' requested by ':1.171' (uid=0 pid=22736 comm="/usr/bin/gdbus 
Μαρ 24 19:52:00 user-VirtualBox dbus-daemon[581]: [system] Failed to activate service 'org.freedesktop.PackageKit': timed out (service_start_timeout=25000ms)
Μαρ 24 19:59:32 user-VirtualBox dbus-daemon[581]: [system] Activating via systemd: service name='org.freedesktop.PackageKit' unit='packagekit.service' requested by ':1.174' (uid=0 pid=1727 comm="/usr/bin/gdbus c
Μαρ 24 19:59:57 user-VirtualBox dbus-daemon[581]: [system] Failed to activate service 'org.freedesktop.PackageKit': timed out (service_start_timeout=25000ms)
Μαρ 24 20:01:40 user-VirtualBox dbus-daemon[581]: [system] Activating via systemd: service name='org.freedesktop.PackageKit' unit='packagekit.service' requested by ':1.176' (uid=0 pid=6556 comm="/usr/bin/gdbus c
Μαρ 24 20:02:05 user-VirtualBox dbus-daemon[581]: [system] Failed to activate service 'org.freedesktop.PackageKit': timed out (service_start_timeout=25000ms)
Μαρ 24 20:10:30 user-VirtualBox dbus-daemon[581]: [system] Activating via systemd: service name='org.freedesktop.PackageKit' unit='packagekit.service' requested by ':1.110' (uid=1000 pid=2814 comm="/usr/bin/gnom
Μαρ 24 20:10:55 user-VirtualBox dbus-daemon[581]: [system] Failed to activate service 'org.freedesktop.PackageKit': timed out (service_start_timeout=25000ms)

Due to foreign languase lessons in my ubuntu 16.04LTS with unity installed, I have 3 keyboard language layouts, English, Greek and Japanese (anthy). I most often use Greek and English.

My problem is that I find having 3 languages makes me less productive, so I thought if I could via a terminal alias to set "modes" for example by typing an alias like

japanese_on

I would have all three languages available, but when I type the command (alias):

japanese_off

I will no longer be able to switch to the Japanese layout with a shortcut - instead I can switch only between Greek and English (and default to English).

As far as I know both Greek and Japanese use an IBus input method instead of Xorg option.

The main difference between this question is that I want to select the list of available languages that I will be able to change via pressing Ctrl+Alt or similar key combination.

In other words i want to do as the following image shows:

I found this nice script for generating the menu on fluxbox: https://github.com/trizen/fbmenugen

But for my needs I need to find the libraries perl-linux-desktopfiles and perl-file-desktopentry. Do you know How I can install them for ubuntu 16.04LTS?

In libreoffice I want to be able to do a pie chart similar to the one that image shows:

I tried to do it via providing 2 tables in my calc:

For the "NO" answers from the right part I want to display the "nested"/"small"/"internal" pie with the data from the left.

Do you know how to do that?

When I was troubleshooting an Xorg problem, I came across solutions telling me to set the greeter such as:

greeter-session=unity-greeter

But I am unable to understand:

• what a greeter is to begin with, and
• why can a misconfigured greeter cause Xorg to run in low graphics mode?

On Kubuntu 16.04 I use the dark-breeze theme, but that results into having non-visible icons on libreoffice as the image shows bellow: I like dark-breeze desktop theme but I do not like that I am unable to see the icons on Libre Office.

Do you know how to fix that?

Over my Kubuntu 16.04 LTS machine I try to spawn a VM using virtualbox but the whole ui comletely freezes. Few days before with same OS over my laptop I manage to spaawn vms.

My machine has 16GB ram and 16GB swap so swap does not seem to be an issue according to Ubuntu freezes when starting virtualbox

I also tried to reinstall both virtualbox & virtualbox-dkms packages without any noticable change towards to a better option.

By default when you install the japaneese language on Ubuntu 16.04 uses the mozc method. But is inconvenient for me thefore I want to install the anthy.

So I installed these packages:

pcmagas@pcmagas-Lenovo-G70-70:~$ dpkg -l | grep anthy
ii  anthy                                                       9100h-25ubuntu1                                     amd64        input method for Japanese - backend, dictionary and utility
ii  anthy-common                                                9100h-25ubuntu1                                     all          input method for Japanese - common files and dictionary
ii  anthy-el                                                    9100h-25ubuntu1                                     all          input method for Japanese - elisp frontend
ii  libanthy0:amd64                                             9100h-25ubuntu1                                     amd64        input method for Japanese - runtime library

I also installed the support for Japaneese via the "Language support", but when I try to select the input method I cannot find the "Japaneese(Anthy)" entry but only the one that uses mozc.

Can you tell me how to enable the input method via Anthy;

Hello fellows I have the following application: https://github.com/kawai-developers/faster

And I try to build it as a scope for ubuntu phone

I managed to add the platfrom for ubuntu with the followign command:

ionic platform add ubuntu

And that generated to me the following files on ./platforms/ubuntu:

Where on folder www is any source code with the angular libraries inside-

But how all these files above I will build it as a click package?

When I run on the terminal:

ionic ubuntu build

I get on ./platforms/ubuntu/native the following files:

And the following response:

Running command: /home/pcmagas/Kwdikas/Javascript/Ionic/Faster/hooks/after_prepare/010_add_platform_class.js /home/pcmagas/Kwdikas/Javascript/Ionic/Faster
add to body class: platform-ubuntu
Running command: /home/pcmagas/Kwdikas/Javascript/Ionic/Faster/platforms/ubuntu/cordova/build 
Building...
Note: to build a debian package, run: 
 cd /home/pcmagas/Kwdikas/Javascript/Ionic/Faster/platforms/ubuntu/native/com.ionicframework.faster723190; debuild

And I have the option to build a .deb package. But not as a .click one;

I tried the following commands:

cd  ./platforms/ubuntu
click build .
click verify com.ionicframework.faster723190_0.0.1_all.click

The last command gave me the error:

Traceback (most recent call last):
  File "/usr/bin/click", line 86, in <module>
    sys.exit(main())
  File "/usr/bin/click", line 82, in main
    return mod.run(args)
  File "/usr/lib/python3/dist-packages/click/commands/verify.py", line 37, in run
    installer.audit(package_path, slow=True)
  File "/usr/lib/python3/dist-packages/click/install.py", line 190, in audit
    'No "framework" entry in manifest')

Also Ubuntu SDK does not help to import existing ionic projects that have not inserted before.

Note: Before I execute any sort of command I moves to my project's folder by typing:

cd <project folder>