- To update the system
- Removing Packages
- Pacman is completely broken! How do I reinstall it?
Some very basic commands.
To update the system
sudo pacman -Syu
Update the database:
sudo pacman -Syy
To install a package (always run pacman -Syu, before installing):
sudo pacman -S package_name
To install a local package, or from a website:
sudo pacman -U /path/to/the/package
To re-install all packages (those from the repo’s), in case of emergency:
sudo pacman -Sy $(pacman -Q | cut -d " " -f1 | grep -v "$(pacman -Qm | cut -d " " -f1)")
If you want to only remove the package, the following command is sufficient:
sudo pacman -R
To remove the package and those of its dependencies that aren’t needed by any other application, do
sudo pacman -Rs
Finally, to remove the package, avoid orphaned dependencies and erase its global configuration, type
sudo pacman -Rns package_name
which in most cases is the proper command to remove software.
Info about an installed package:
pacman -Qi package_name
Queries the repo about a package:
pacman -Ss package_name
Queries the repo about a packages, and all that depend on it:
pacman -Sii package_nam
List and Remove Installed Packages that are not in the Official Repositories:
If you want a list of the packages you installed and are not in the official repositories, you can run this script:
#! /bin/bash installed=`pacman -Q | sed -e "s|(.*[^ ]*) .*|1|g" ` repos=`pacman -Sl | sed -e "s|[^ ]* (.*[^ ]*) .*|1|g"` for pkg in $installed do found=`echo $repos | grep $pkg` if [ "$found" == "" ]; then echo $pkg fi done # end
Save it in a file, give it execution permission (chmod +x file.sh) and run it:
It will print the packages you have installed which are not in the official repositories. You can also send the list to a text file:
./file.sh > foreignlist.txt
Then, you can edit the list (to remove from it the software you still want in your system), and once the list has only software packages you want to remove, you can run this command to remove those:
sudo pacman -R $(cat foreignlist.txt)
Pacman is completely broken! How do I reinstall it?
In the case that pacman is broken beyond repair, manually download the necessary packages (openssl, libarchive, and pacman) and extract them. The pacman binary will be restored along with its default configuration file. Afterwards, reinstall these packages with pacman to maintain package database integrity. You can use this command to extract them.
sudo tar -xwvpf <i>package_name-version.tar.xz</i> -C / --exclude .PKGINFO --exclude .INSTALL
More info: http://wiki.archlinux.org/index.php/Pacman