Wiki-GuedeL

Cette page est en lecture seule. Vous pouvez afficher le texte source, mais ne pourrez pas le modifier. Contactez votre administrateur si vous pensez qu'il s'agit d'une erreur.
<color #22b14c>**Small tricks for Ubuntu**</color> 

====== Add a network interface (Ubuntu22) by CLI ======
  * list the interfaces <code># ip link show</code>
  * activate the interface <code># ifconfig ens19 up</code>
  * set the IP of the interface: <code># nano /etc/netplan/00-installer-config.yaml</code> and add the interface name and the settings
  * apply the settings:<code># netplan apply</code>
====== Auto-connect VPN and Wifi ======
<note>runs on Ubuntu18 LXDE</note>
  * <code># nano /etc/lightdm/lightdm.conf.d/restart-NM.sh   //// and enter in it:
#!/bin/bash

# wait 20 secondes
sleep 20s

#restart NetworkManager 
service network-manager restart

exit 0</code>
  * <code># chmod +x /etc/lightdm/lightdm.conf.d/restart-NM.sh</code>
  * <code># nano /etc/lightdm/lightdm.conf.d/10-restart-NM.conf   //// and enter in it:
[SeatDefaults]
session-setup-script=/etc/lightdm/lightdm.conf.d/restart-NM.sh </code>

====== Beep ======
Pour activer le "beep":
  * <code># apt-get install beep</code>
  * tester si le beep fonctionne: <code>$ sudo modprobe pcspkr     // ce réglage ne supportera pas un reboot!!
$ beep</code>
  * Rendre persistant: <code>$ sudo nano /etc/modprobe.d/blacklist.conf
....</code> et commenter la ligne ''blacklist pcspkr''


====== Change the keyboard layout into the login manager ======
works for Lubuntu20:
<code>sudo dpkg-reconfigure keyboard-configuration</code>
and maek your choise.

====== Disable the touchpad of laptops ======
Source: https://askubuntu.com/questions/819789/permanently-disable-touchpad-lubuntu-16-04  \\
For "Lubuntu" (LXDE): //Preferences>Default applications for LXSession>AutoStart> then "Add" synclient TouchpadOff=1//


====== Documents management ======
https://gitlab.gnome.org/World/OpenPaperwork/paperwork/blob/master/flatpak/README.markdown#readme

====== Position of the icons on the desktop not stored ======
If one day all your icons are always on the left side of the desktop and their position is not remembered between the sessions: check the permissions and make a correct setting:
<code>$ find . '!' -user $USER              and look if "./.local/share/gvfs-metadata/home" is present into the list of files not owned by you
$ ls -al ./.local/share/gvfs-metadata/home   will show who is the owner (generally this is "root")
$ sudo chown -R your_user_name:the_group .local/share/gvfs-metadata/home   </code>
Logout and re-login: the problem should be gone.

====== Remote Desktop ======
**Via RDP** \\ 
Install and run the script given here: http://c-nergy.be/blog/?p=11868 \\ 
See https://help.ubuntu.com/community/xrdp too.

====== Run a script at startup ======
https://linuxconfig.org/how-to-run-script-on-startup-on-ubuntu-20-04-focal-fossa-server-desktop
<code>$ sudo cat /usr/local/bin/wol-omv.sh 
#!/bin/bash

/usr/sbin/etherwake -i enp34s0 00:11:22:33:44:55</code>
<code>
$ sudo cat /etc/systemd/system/wol-omv.service 
[Unit]
After=network-online.target
Wants=network-online.target

[Service]
ExecStart=/usr/local/bin/wol-omv.sh

[Install]
WantedBy=default.target
</code>
<code># chmod 744 /usr/local/bin/wol-omv.sh
# chmod 664 /etc/systemd/system/wol-omv.service
</code>
<code>sudo systemctl daemon-reload
# systemctl enable wol-omv.service</code>

===== Attendre la fin du script =====
<note important>Ceci est un brouillon!</note>
https://unix.stackexchange.com/questions/599372/kill-systemd-oneshot-service-after-timeout \\
https://trstringer.com/simple-vs-oneshot-systemd-service/ \\
https://docs.fedoraproject.org/en-US/quick-docs/understanding-and-administering-systemd/

<code>
$ sudo cat /etc/systemd/system/le-service.service 
[Unit]
After=network-online.target
Wants=network-online.target

[Service]
Type=oneshot
TimeoutStartSec=10s
ExecStart=/usr/local/bin/le-script.sh

[Install]
WantedBy=default.target
</code>
Il faut un "TimeoutStartSec" et non un "TimeoutStopSec" car "Behavior of oneshot is similar to simple; however, the service manager will consider the unit started after the main process exits."

====== Terminal ======
https://serverfault.com/questions/267099/terminal-only-shows

====== Webcam ======
Settings of webcam:
===== v4l-utils =====
  * <code>$ sudo apt-get install v4l-utils</code>
  * <code>$ v4l2-ctl -l</code> to list the possible settings
  * <code>$ v4l2-ctl -c focus_auto=0</code> to disable the autofocus
  * <code>$ v4l2-ctl -c focus_absolute=100</code> to set the focus at value "100"

===== GTK+ UVC Viewer (UNOFFICIAL) =====
installed via the software manager (look for "guvcview")
Wiki-GuedeL

Outils pour utilisateurs

Outils du site

Outils de la page
