# Random Arch Stuff

***

## Resources

Swap space guidelines from [Red Hat](https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/storage_administration_guide/ch-swapspace).

| Amount of RAM in the system | Recommended swap space     | Recommended swap space if allowing for hibernation |
| --------------------------- | -------------------------- | -------------------------------------------------- |
| ⩽ 2 GB                      | 2 times the amount of RAM  | 3 times the amount of RAM                          |
| > 2 GB – 8 GB               | Equal to the amount of RAM | 2 times the amount of RAM                          |
| > 8 GB – 64 GB              | At least 4 GB              | 1.5 times the amount of RAM                        |
| > 64 GB                     | At least 4 GB              | Hibernation not recommended                        |

[ext4 to btrfs conversion](https://btrfs.readthedocs.io/en/latest/Convert.html), [Arch wiki](https://wiki.archlinux.org/title/btrfs#Ext3/4_to_Btrfs_conversion) also has some good information regarding it. Setting up Ubuntu-type subvolumes (@ and @home) necessary for use with [Timeshift](https://wiki.archlinux.org/title/Timeshift) (why else are you converting ext4 to btrfs?). There are [other snapshot tools](https://wiki.archlinux.org/title/snapper) but I haven't checked them out.

## System

Recreate/regenerate the `initramfs` image

```bash
mkinitcpio -P
```

To generate more Unified Kernel Images using sbctl, refer to [sbctl Arch man pages](https://man.archlinux.org/man/sbctl.8#EFI_BINARY_COMMANDS). It's worth keeping a `linux-lts` kernel installed.

{% code overflow="wrap" %}

```bash
sbctl bundle --amducode /boot/amd-ucode.img --save /efi/EFI/Linux/arch-linux-lts.efi

# other useful stuff
sbctl generate-bundles --sign
sbctl list-bundles
```

{% endcode %}

The path for kernel parameters is `/etc/kernel/cmdline`.

### Pacman/Paru

If updating after a while, update the key-ring `pacman-key --refresh-keys`

To create snapshots automatically for Timeshift before an update is applied, use [timeshift-autosnap](https://aur.archlinux.org/packages/timeshift-autosnap) AUR package.

`pacman -Qtdq` or `pacman -Qtd` to query for orphan packages.

`pacman -Rns` to remove packages.

`pacman -Qm` or `paru -Qma` to list all AUR packages.

TODO: Uninstall GNOME/KDE fully.

## Packages

### Bat

If `bat` throws out the following warning,

```bash
[bat warning]: Unknown theme 'Catppuccin Mocha', using default
```

Use `bat cache --build` to fix it.


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