---
keywords:
  - IT
---
# Archlinux
### clean system from old files
```
paccache -r
paccache -ruk0
paccache -rk1

yay -Ycc
flatpak uninstall --unused
journalctl --disk-usage && journalctl --vacuum-size={size}M
```
or prepare the file`/etc/systemd/journald.conf` and this value:`SystemMaxUse=50M`

## customize fresh system
- /etc/mkinitcpio.conf
- /boot/loader/entries/arch.conf https://wiki.archlinux.org/title/Kernel_parameters#systemd-boot
- unified kernel image https://wiki.archlinux.org/title/Unified_kernel_image
- kernel cmdline
    - power state cpu
    - WARNING: do not use the partuuid in the cmdline. check the uuid correctness with the LUKS container, `blkid`
    - root and resume are links to the mapper
- reboot the system to check if anything is broken
- add secureboot https://wiki.archlinux.org/title/Unified_Extensible_Firmware_Interface/Secure_Boot#Implementing_Secure_Boot


## failure recovery
1. boot from archlinux usb stick
2. mount LUKS Container `cryptsetup luksOpen /dev/nvme0n1pX luksDev`
3. temporary dir `mkdir tmpmnt`
4. mount `mount -o subvol=@ /dev/mapper/luksDev tmp`
5. `arch-chroot tmp bash`
6. `mount /dev/nmve0n1p1 /boot`
7. fix stuff
8. `mkinicpio -p linux`
9. sync, unmount boot and tmp
10. `cryptsetup luksClose luksdev`