Plesk update fail: Available disk space check. There is not enough disk space available in the / directory.

Symptoms

Plesk update fails with the following error:

ERROR: Components and product validation detected at least one important issue:
Available disk space check
There is not enough disk space available in the / directory. You need to free up 164.1 MB.

Cause

There is not enough free space in
/
or
/tmp
directories to perform an upgrade.

Resolution

1. Connect to the server via SSH;

2. Verify that there is enough free disk space in the / directory and 3GB of free disk space in the /tmp directory:

   # df -h /tmp
   Filesystem Size Used Avail Use% Mounted on
   /dev/sda4 200G 100G 100G 50% /tmp
   # df -h /
   Filesystem Size Used Avail Use% Mounted on
   /dev/sda3 376G 101G 275G 27% /

If there is not enough disk space, consider resizing the partitions or deleting unnecessary files, for example, temporary ones.

Additional information

Hardware requirements for Plesk Obsidian