To search for a package in Arch Linux, you can use the pacman package manager with the -Ss option.
For example, to search for the nginx package, you can use the following command:
pacman -Ss nginx
This will search the package database for packages that contain the keyword nginx and display a list of matching packages.
You can also use the -Qs option to search for installed packages. For example:
pacman -Qs nginx
This will search the installed packages for packages that contain the keyword nginx and display a list of matching packages.
You can use the -A option to search for packages in a specific repository. For example:
pacman -Ss -A community nginx
This will search the community repository for packages that contain the keyword nginx and display a list of matching packages.
You can use various other options to customize the search, such as the -e option to search for exact matches, or the -i option to ignore case.
For a complete list of options and more information about using the pacman command, you can use the --help option. For example:
pacman --help
This will display a list of all available options and their descriptions.
It's important to note that the pacman command is only available on Arch Linux and Arch-based systems. If you are using a different Linux distribution, you will need to use a different package manager to search for packages.