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Linux Notes

pacman

pacman -S -> for install related things, search in repos, etc.
pacman -R -> to remove
pacman -Q -> to query installed ones

To query which package (from the repos, provides a file)

pacman -Fy filename
pacman -Fy libsane.so
pacman -F dig

(y is for syncing, so once you have done that, you may skip that if you are running the command instantly later).

pacman -Syu -> sync and update the system
pacman -S bind -> install package `bind` but do this only after once you have synced and updated recently
pacman -Ss zathura -> search for `zathura` package, this will show all the packages having zathura in their name or description
pacman -Rs telegram-desktop -> remove `telegram-desktop` package along with its dependencies.
pacman -R zathura-pdf-poppler -> remove this package, leaving behind any dependencies that it might have.
pacman -Rns telegram-desktop -> remove this package, along with the conf files and dependencies.
pacman -Q -> lists all the packages installed on the system
pacman -Qe -> lists all the packages installed by you (or installed as a dep of a program that you installed)
pacman -Qdt -> lists the packages that are kinda orphaned, they were installed as a dep by another program but the another program no longer exists and so they are not needed by any other program and so they can be removed.
pacman -Q | wc -l -> wew, counts the number of packages, lol

Configure the following options in /etc/pacman.conf -

Color -> for having colored output in pacman results

ILoveCandy -> for having pacman icon instead of hash-sign on progress-bar in pacman results.

which package provides a missing file?

vncviewer: error while loading shared libraries: libcrypt.so.1: cannot open shared object file: No such file or directory

This most probably means that some package which provides this missing lib file is currently not installed.

$ pkgfile -s libcrypt.so                                                 
core/libxcrypt
community/aarch64-linux-gnu-glibc
community/riscv64-linux-gnu-glibc
multilib/lib32-libxcrypt

Now, we can install any of these packages (example: sudo pacman -S libxcrypt)

tweaks and utilities

  • pandoc for converting .md to .pdf, etc.
sudo pacman -Syu pandoc texlive-core texlive-fontsextra texlive-latexextra

pandoc file.md -o file.pdf

change default shell

List all the available shells -

$ chsh -l

/bin/sh
/bin/bash
/bin/zsh
/usr/bin/zsh
/usr/bin/git-shell
/usr/bin/fish
/bin/fish

If the shell is not present here, example, /usr/local/fish, then you should first add it to this list -

echo /usr/local/bin/fish | sudo tee -a /etc/shells

Example to change to fish shell -

$ chsh -s /usr/local/bin/fish

changing shell for devpogi.
Password: 
Shell changed.

You might need to logout and login again for the changes to take place.

networks

dig @root-server-ip www.facebook.com

root servers ip

cheatsheets

curl cheat.sh/<query>
curl cheat.sh/pacman
curl cheat.sh/git-status

samsung monitor M5 not detected feat. nvidia graphics

  • If the nvidia drivers are already installed, a popup for "password for secure boot" shows up during the first install of the drivers.
  • The same popup will occur when switching from nvidia-470 to say nvidia-535.
  • Type a new password, and reboot.
  • On boot, the first screen will have options like "Continue boot", "MOK", "something MOK", etc...
  • Select "MOK" -> Verify the key (just the details like os name, etc.) -> Enter password -> Reboot.

Now, the monitor should be recognized. This method works as an alternative to "disabling secure boot from bios" method. stackoverflow, mokutil

Also, enable prime profile from nvidia settings -

sudo prime-select nvidia