Tutorial on pacman in Parabola-GNU

README.org

@@ -32,6 +32,7 @@ opportunity to learn about computers, files, directories and programs.
  * [[./tutorial/dd_command_flash_usb.org][Using dd command to flash usb]]
  * [[./tutorial/compress_pdf.org][Compress a pdf file]]
  * [[./tutorial/luakit.org][Searching and editing configuration files]]
+ * [[./tutorial/pacman.org][Use package manager in Parabola GNU-linux]]
 
 ** File conversion
 

tutorial/pacman.org

@@ -0,0 +1,77 @@
+#+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 |
+
+#+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