From 163cdf97d2bb4e02ee3c8d3bd785573e89860eec Mon Sep 17 00:00:00 2001
From: Robert <robertofon@os23.de>
Date: Tue, 22 Oct 2024 22:42:46 +0200
Subject: [PATCH] erster wurf

---
 mint/make_swapvol.sh | 62 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 mint/make_swapvol.sh

diff --git a/mint/make_swapvol.sh b/mint/make_swapvol.sh
new file mode 100644
index 0000000..4b26bc2
--- /dev/null
+++ b/mint/make_swapvol.sh
@@ -0,0 +1,62 @@
+#!/bin/sh
+
+TODO: Das muss noch entwickelt geteset werden
+
+# 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.
+# Let's assume that the current swap is already off, the / is on /dev/sda1 and Ubuntu is installed with / on @ subvolume and /home is on @home subvolume.
+#  Mount /dev/sda1 to /mnt.
+
+   sudo mount /dev/sda1 /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 /dev/sda1 /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.
+#
+# You also need to update /etc/fstab to mount all this on boot. Add there two lines:
+# uuid from Dev
+uuid=$(lsblk -n -o UUID /dev/sda1)
+sudo echo "UUID=$uuid /swap btrfs subvol=@swap 0 0 /swap/swapfile none swap sw 0 0" >> /etc/fstab
+
+# The UUID is the one of your /dev/sda1.
+