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citadel/docs/howto.md

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How to make rootfs writable

  1. Open Citadel terminal

  2. Su to root

    $ su

  3. Remount root as read-write

    mount -o remount,rw /

How to change timezone

  1. Make rootfs writable

  2. Run Setting application in Gnome, change timezone in Details -> Date & Time

How to change Gnome lock screen passwd

  1. Open Citadel terminal

  2. Generate new password with openssl

    $ openssl passwd Password: Verifying - Password: sGYyWXqDuh64g

  3. Su to root

    $ su

  4. Make rootfs writable

    mount -o remount,rw /

  5. Copy new password hash into /etc/shadow

    vim /etc/shadow

How to install image update

  1. Open Citadel terminal

  2. Su to root

  3. Determine if current boot is from rootfsA or rootfsB. Make sure you don't overwrite the currently mounted rootfs partition!

    findmnt /

    TARGET SOURCE FSTYPE OPTIONS / /dev/mapper/citadel-rootfsA ext2 rw,relatime,errors=continue,user_xattr

  4. Locate the rootfs update image you want to install

    file /storage/user-data/primary-home/citadel-image-intel-corei7-64.ext2

    /storage/user-data/primary-home/citadel-image-intel-corei7-64.ext2: Linux rev 1.0 ext2 filesystem data, UUID=d9dd20e9-9286-4c60-9dc3-37c68e36481c (large files)

  5. Write to the correct partition with dd command.

    dd if=/storage/user-data/primary-home/citadel-image-intel-corei7-64.ext2 of=/dev/mapper/citadel-rootfsB bs=4M

    255+1 records in 255+1 records out 1071823872 bytes (1.1 GB, 1022 MiB) copied, 3.01726 s, 355 MB/s

  6. Sync just to be sure everything is flushed to disk, then reboot into new image.

    sync

    reboot

How to have hardware graphics acceleration for applications

  1. Open Citadel terminal

  2. Su to root

  3. Make rootfs writable

    mount -o remount,rw /

  4. Enable /dev/dri/renderD128 bind mount in primary.nspawn file

    vim /etc/systemd/nspawn/primary.nspawn

How to use Qemu?

  1. Open Citadel terminal

  2. Su to root

  3. Make rootfs writable

    mount -o remount,rw /

  4. Enable /dev/kvm bind mount in primary.nspawn file

    vim /etc/systemd/nspawn/primary.nspawn