aktualisiert

mint/make_swapvol.sh

@@ -1,6 +1,8 @@
 #!/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.
 # 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 "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
-
 #    If you run ls /mnt, you'll see @, @home and other subvolumes that may be there.
 
 #   Create a new @swap subvolume.
-
 sudo btrfs sub create /mnt/@swap
 
 #    Unmount /dev/sda1 from /mnt.
-
 sudo umount /mnt
 
 #    Create /swap directory where we plan to mount the @swap subvolume.
-
 sudo mkdir /swap
 
 #    Mount the @swap subvolume to /swap.
-
 sudo mount -o subvol=@swap $rootdev /swap
 
 #    Create the swap file.
-
 sudo touch /swap/swapfile
 
 #    Set 600 permissions to the file.
-
 sudo chmod 600 /swap/swapfile
 
 #    Disable COW for this file.
 sudo chattr +C /swap/swapfile
 
 #    Set size of the swap file to 8G as an example.
-
 sudo dd if=/dev/zero of=/swap/swapfile bs=1M count=8192
 
 #    Format the swapfile.
-
 sudo mkswap /swap/swapfile
 
 #    Turn the swap file on.
-
 sudo swapon /swap/swapfile
 
 # Now the new swap should be working.
@@ -72,7 +64,8 @@ sudo swapon /swap/swapfile
 echo "Update /etc/fstab mit uuid Spezifizierung"
 # uuid from Dev
 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.
 echo "Fertig"