linux cheatsheet

linux-cheatsheet.md

• nmap

  If installed with snap it gives an error: dnet: Failed to open device enp0sxxxx

  Fix: https://askubuntu.com/a/1312647

  scan network

  sudo nmap -sT -O 192.168.1.0/24 > nmap_output
  

  scan ports in an IP

  nmap -p0-65535 192.168.1.3
  

• socat

  socat TCP-LISTEN:6080,fork TCP:192.168.1.197:6080
  

• check the disk speed

  dd if=/dev/zero of=/tmp/test4.img bs=512M count=1 oflag=dsync

• photosphere xmp/exif

  Basic sphere xmp https://evanwill.github.io/_drafts/notes/photosphere.html

  exiftool -XMP-GPano:FullPanoHeightPixels="4096" -XMP-GPano:FullPanoWidthPixels="8192" -XMP-GPano:ProjectionType="equirectangular" -XMP-GPano:UsePanoramaViewer="True" DJI_EXAMPLE.JPG

  Copy everything from a source https://exiftool.org/forum/index.php?topic=3440.msg15542#msg15542

  exiftool -TagsFromFile SOURCE.JPG "-all:all>all:all" TARGET.JPG

• .desktop of snaps

  /var/lib/snapd/desktop/applications
  

• some app icons

  /usr/share/pixmaps/
  

• n-vidia drivers

  https://linuxconfig.org/how-to-install-the-nvidia-drivers-on-ubuntu-20-04-focal-fossa-linux

• ALSA sound card

  Drivers: https://askubuntu.com/a/1027405

  Applet: https://askubuntu.com/a/867827

• network manager + wpa_supplicant

  https://gist.github.com/jjsanderson/ab2407ab5fd07feb2bc5e681b14a537a

  my workarround: echo <PASSWORD> | sudo -S /bin/bash -c "killall wpa_supplicant && systemctl restart NetworkManager && nm-applet" &

  old: https://www.linuxtechi.com/assign-static-ip-address-ubuntu-20-04-lts/

• change keyboard layout with alt shift

  https://askubuntu.com/questions/1228931/how-to-switch-keyboard-layout-in-openbox-using-keyboard-shortcuts

  put an gxkb applet for keyboard layout

  sudo apt install gxkb
  

  put the greek flag in the gxkb applet

  sudo cp /usr/share/gxkb/flags/gr.png /usr/share/gxkb/flags/el.png
  

• change the timezone

  timedatectl list-timezones
  sudo timedatectl set-timezone Europe/Amsterdam
  

• do not wait for network in ubuntu server

  https://askubuntu.com/questions/972215/a-start-job-is-running-for-wait-for-network-to-be-configured-ubuntu-server-17-1

• Theming

I like graybird for the windows and numix for openbox theme

  sudo apt install lxappearance greybird-gtk-theme numix-gtk-theme

• Git

  Change the author

  git rebase -i HEAD~5 -x "git commit --amend --author 'newName <new@email.com>' --no-edit"
  

  git filter-branch --env-filter \
    'if [ $GIT_COMMIT = 1960ee81830d236a1748e9a17ced83a2e5a5b3ea ]
     then
         export GIT_AUTHOR_DATE="Mon Oct 11 21:28:35 2021 +0200"
         export GIT_COMMITTER_DATE="Mon Oct 11 21:28:35 2021 +0200"
     fi'
  

  https://stackoverflow.com/a/454750

  git filter-branch -f --env-filter "GIT_AUTHOR_NAME='newName'; GIT_AUTHOR_EMAIL='new@email.com'; GIT_COMMITTER_NAME='newName'; GIT_COMMITTER_EMAIL='new@email.com';" HEAD