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B3rtl 2024-11-11 20:42:11 +00:00
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commit 72331b50c5
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19
mint/make_swapvol.sh
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@ -1,6 +1,8 @@
#!/bin/bash #!/bin/bash
## TODO: Das muss noch entwickelt geteset werden # skript baut ein subvol /@swap unten drunter und mountet das
# ganze als /swap um darin /swap/swapfile als swapspace
# zu aktivieren - größe 8G oder was man sich ausdenkt
# It is possible to use a swap file on btrfs, but there are some considerations that need taking care of. # It is possible to use a swap file on btrfs, but there are some considerations that need taking care of.
# btrfs filesystem doesn't let to create snapshots if there is a working swap file on the subvolume. That means that it is highly recommended to place a swap file on a separate subvolume. # btrfs filesystem doesn't let to create snapshots if there is a working swap file on the subvolume. That means that it is highly recommended to place a swap file on a separate subvolume.
@ -22,48 +24,38 @@ rootdev=${rootdevsrc%\[/@]}
echo "BTRFS-Device ist daher $rootdev" echo "BTRFS-Device ist daher $rootdev"
echo "OK - erzeuge jetzt (etwas umständlich) ein SubVol /@swap, in dem swapfile liegt" echo "OK - erzeuge jetzt (etwas umständlich) ein SubVol /@swap, in dem swapfile liegt"
# zunächst nochmal mounten, damit die root-subvols sichtbar werden
sudo mount $rootdev /mnt sudo mount $rootdev /mnt
# If you run ls /mnt, you'll see @, @home and other subvolumes that may be there. # If you run ls /mnt, you'll see @, @home and other subvolumes that may be there.
# Create a new @swap subvolume. # Create a new @swap subvolume.
sudo btrfs sub create /mnt/@swap sudo btrfs sub create /mnt/@swap
# Unmount /dev/sda1 from /mnt. # Unmount /dev/sda1 from /mnt.
sudo umount /mnt sudo umount /mnt
# Create /swap directory where we plan to mount the @swap subvolume. # Create /swap directory where we plan to mount the @swap subvolume.
sudo mkdir /swap sudo mkdir /swap
# Mount the @swap subvolume to /swap. # Mount the @swap subvolume to /swap.
sudo mount -o subvol=@swap $rootdev /swap sudo mount -o subvol=@swap $rootdev /swap
# Create the swap file. # Create the swap file.
sudo touch /swap/swapfile sudo touch /swap/swapfile
# Set 600 permissions to the file. # Set 600 permissions to the file.
sudo chmod 600 /swap/swapfile sudo chmod 600 /swap/swapfile
# Disable COW for this file. # Disable COW for this file.
sudo chattr +C /swap/swapfile sudo chattr +C /swap/swapfile
# Set size of the swap file to 8G as an example. # Set size of the swap file to 8G as an example.
sudo dd if=/dev/zero of=/swap/swapfile bs=1M count=8192 sudo dd if=/dev/zero of=/swap/swapfile bs=1M count=8192
# Format the swapfile. # Format the swapfile.
sudo mkswap /swap/swapfile sudo mkswap /swap/swapfile
# Turn the swap file on. # Turn the swap file on.
sudo swapon /swap/swapfile sudo swapon /swap/swapfile
# Now the new swap should be working. # Now the new swap should be working.
@ -72,7 +64,8 @@ sudo swapon /swap/swapfile
echo "Update /etc/fstab mit uuid Spezifizierung" echo "Update /etc/fstab mit uuid Spezifizierung"
# uuid from Dev # uuid from Dev
uuid=$(lsblk -n -o UUID $rootdev) uuid=$(lsblk -n -o UUID $rootdev)
sudo echo "UUID=$uuid /swap btrfs subvol=@swap 0 0 /swap/swapfile none swap sw 0 0" >> /etc/fstab sudo echo "UUID=$uuid /swap btrfs defaults,subvol=@swap 0 0" >> /etc/fstab
sudo echo "/swap/swapfile none swap sw 0 0" >> /etc/fstab
# The UUID is the one of your /dev/sda1. # The UUID is the one of your /dev/sda1.
echo "Fertig" echo "Fertig"