Merge pull request #381 from Eaterminer/patch-1

docs: Replace fallocate in adding-swap docs

Author: tormath1

content/docs/latest/setup/storage/adding-swap.md

@@ -62,11 +62,12 @@ systemd provides a specialized `.swap` unit file type which may be used to activ
 
 The following commands, run as root, will make a 1GiB file suitable for use as swap.
 
+> From Flatcar 4186, one can directly use mkswap to create a swap file as follow. For older Flatcar versions, you still need to create a swap file with `dd if=/dev/zero of=/var/vm/swapfile1`, `chmod 600 /var/vm/swapfile1` and `mkswap /var/vm/swapfile1`
+
+
 ```shell
 mkdir -p /var/vm
-fallocate -l 1024m /var/vm/swapfile1
-chmod 600 /var/vm/swapfile1
-mkswap /var/vm/swapfile1
+mkswap --size 1024m --file /var/vm/swapfile1
 ```
 
 ### Creating the systemd unit file
@@ -169,9 +170,7 @@ systemd:
         [Service]
         Type=oneshot
         ExecStart=/usr/bin/mkdir -p /var/vm
-        ExecStart=/usr/bin/fallocate -l 1024m /var/vm/swapfile1
-        ExecStart=/usr/bin/chmod 600 /var/vm/swapfile1
-        ExecStart=/usr/sbin/mkswap /var/vm/swapfile1
+        ExecStart=/usr/bin/mkswap --size 1024m --file /var/vm/swapfile1
         RemainAfterExit=true
 ```