bash-tutorial/tutorial/pacman.org

#+date: 2021-07-28
#+options: toc:nil num:nil

* Checking and cleaning packages and package cache in Parabola GNUlinux

** Check the number of packages in cache

[[https://ostechnix.com/recommended-way-clean-package-cache-arch-linux/][Based on this link]] and on Arch linux Wiki

Open a terminal and run the code

#+begin_example sh
  sudo ls /var/cache/pacman/pkg/ | wc -l
#+end_example

#+RESULTS:
 | 6000 |

Check space used by packages (cache)

#+begin_src bash
  du -sh /var/cache/pacman/pkg/
#+end_src

#+RESULTS:
| 7,3G | /var/cache/pacman/pkg/ |


Remove packages in cache, keeping one version (last)

#+begin_example sh
  paccache -rk1
#+end_example

#+RESULTS:
|==> finished 1146 packages removed (disk space saved: 4.04 GiB)|

Remove all of uninstalled packages in cache

#+begin_example sh
  paccache -ruk0
#+end_example

#+RESULTS:
...90.88 Mib


Run this to see issues in the system

#+begin_example sh
  journalctl -p 3 -xb
#+end_example

** Removing unused packages by name


Let's say you want to delete the following packages:

 * zim
 * mpv
 * smplayer

#+begin_example sh
  pacman -Rs zim mpv smplayer
#+end_example

** List all installed packages

List and redirect the output to the file "pkglist.txt"

#+begin_example sh
  pacman -Qqe > pkglist.txt
#+end_example

List all packages with size

#+begin_example sh
  LC_ALL=C pacman -Qi | awk '/^Name/{name=$3} /^Installed Size/{print $4$5, name}' | sort -h
#+end_example