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Ubuntu Tricks (DEPRECATED)

Dec 25, 20242 min read

Ubutnu Basic Configuration

Ubuntu

    • sudo vim /etc/sudoers, add username ALL=(ALL) NOPASSWD: ALL

  • VGA Driver check sudo lspci | grep -i vga

  • https://wiki.archlinux.org/index.php/Dell_XPS_15_9570

  • Add /etc/default/grub ← GRUB_CMDLINE_LINUX_DEFAULT="mem_sleep_default=deep"

  • sudo apt install tlp, edit /etc/default/tlp, DEVICES_TO_DISABLE_ON_STARTUP="bluetooth"

  • Disable Bluetooth: /etc/bluetooth/main.conf ← AutoEnable=false

  • dconf-editor:

    • org.mate.Marco.general reduced-resources true
    • org.gnome.shell.app-switcher current-workspace-only true

  • dconf-editor (/org/gnome/desktop/wm/keybindings/switch-to-workspace-*)

  • Tweaks → Fonts → Scaling Factor

  • sudo apt-get install compizconfig-settings-manager, ccsm > Desktop > Desktop Wall

  • gsettings list-schemas | grep org.gnome.desktop.interface
gsettings list-keys org.gnome.desktop.interface
gsettings get org.gnome.desktop.interface text-scaling-factor
gsettings set org.gnome.desktop.interface text-scaling-factor 0.9

  • gsettings set org.mate.marco.general.focus-new-window ‘strict’

  • https://plugins.jetbrains.com/plugin/9541-hidpi-profiles

HiDPI

WiFI

  • reinstall drivers apt-get --reinstall install linux-firmware

Suspend Fix

  • sudo dd if=/dev/null of=/var/log/syslog to clear syslog
  • systemctl suspend -i
  • http://linrunner.de/en/tlp/docs/tlp-linux-advanced-power-management.html

Commands

  • Check SSH public-private keys

    • cat $HOME/.ssh/id_rsa.pub >> $HOME/.ssh/authorized_keys
    • ssh -i $HOME/.ssh/id_rsa localhost

  • Find file and do something: http://find.unixpin.com/ru/index.html

  • Find and replace

    find . -type f -name "*.xml" -exec sed -i "s/spring-beans-2\.0\.xsd/spring-beans-3\.0\.xsd/g" {} \;

  • Replace

    sed '/#.*/ d; /^$/ d' /etc/my.cnf

  • Find file with content

    find . -name "*.java" -exec grep "save\|update" {} \;  -print

  • Zip files from txt-file

    zip files.zip -@ < files.txt

  • Find file in archives

    for f in `ls *.jar`; do echo "$f: "; unzip -l $f | grep 'Table'; done

Audio

Audio. Configure switch-on-connect
  1. create ~/.config/pulse/default.pa if it doesn’t exist and append
.include /etc/pulse/default.pa
load-module module-switch-on-connect

This is better than editing /etc/pulse/default.pa. Afterwards you should run pulseaudio -k && pulseaudio --start to have the changes take effect.

Audio. Fix Dummy Output
pulseaudio --kill && sudo alsa force-reload && pulseaudio --start
rm -rf ~/.config/pulse && pulseaudio -k && pulseaudio --start
Audio. Fix Jabra Audio

Add to /usr/share/X11/xorg.conf.d/jabra.conf (with sudo) and then restart

Section "InputClass"
    Identifier "Jabra Audio docking station"
    MatchDevicePath "/dev/input/event*"
    MatchProduct "Netcom"
    MatchVendor "GN_Netcom_A_S"
    Option "Ignore" "true"
EndSection

you can disconnect/connect the headset or start without it and then connect it and nothing freezes.

WebCam
  • reload sudo rm -f /dev/video0 && sudo rmmod uvcvideo && sudo modprobe uvcvideo
  • switch to another webcam:
  • v4l2-ctl --list-devices
  • sudo rm /dev/video0 && sudo ln -s /dev/video2 /dev/video0

TODOs

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