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78 lines
2.5 KiB
Markdown
78 lines
2.5 KiB
Markdown
# Package Managers
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Package managers are important programs to get software onto your system.
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## Arch Linux: Pacman and Yay
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In [Arch Linux](/wiki/linux/arch-linux.md) there are 2 main types of
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package managers.
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The first is pacman, the default package manager.
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For the second type there are many different managers to chose from.
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Those managers are handling for the Arch User Repositories (AUR).
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In this article yay is used as the go to AUR manager.
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yay is also a wrapper for pacman so yay can be used instead of pacman to
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install and update both AUR and main repository programs.
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It features the same syntax.
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### Usage
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This section addresses various uses of the pacman and yay package managers.
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#### Clean Cache
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The cache of all packages except the one installed can be deleted by running the following command.
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```sh
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pacman -Sc
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```
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#### Update Mirrorlist
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After a while not updating the system it is possible for the mirrorlist to be
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outdated.
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This can be fixed by updating it with the following command:
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```sh
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curl -o /etc/pacman.d/mirrorlist https://archlinux.org/mirrorlist/all/
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```
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### Troubleshooting
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This section addresses various errors that can happen when using the package managers yay and
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pacman.
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#### Error While Importing Keys
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Both `yay` and `pacman` use [GPG keys](/wiki/linux/gpg.md).
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It is possible that it runs into errors when importing new keys.
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If this happens you should try to restart the GPG key server
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[as explained in the GPG entry](/wiki/linux/gpg.md#restart-the-gpg-server).
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#### Unknown Public Key
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If the error `ERROR: One or more PGP signatures could not be verified!`, you
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have to manually receive the key and trust it.
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This can be done [as explained in the GPG entry](/wiki/linux/gpg.md#receive-a-key-and-trust-it).
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The identifier of the key usually gets gets printed in the line above the error looking like
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`FAILED (unknown public key <KEYID>)`.
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#### Error During Updating `is marginal trust`
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If the error `[...] Key [...] is marginal trust` occurs while updating the
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system, it can be fixed by running the following commands and then restarting
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the update process of the package manager.
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```sh
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pacman -Sy archlinux-keyring
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pacman-key --populate archlinux
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pacman-key --refresh-keys
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```
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#### Error During Updating `the following untracked working tree files would be overwritten`
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The error `the following untracked working tree files would be overwritten` can happen when the
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cache features a changed version of the files used by yay to update the package.
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This can easily be fixed by removing the cache of the corresponding package.
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