Error extracting /home/username/backups/backup/home.tar.zst : /bin/tar: ./.cagefs/tmp/mysql.sock: Cannot create symlink to ‘/var/lib/mysql/mysql.sock’: Permission denied

Issue

When trying to restore user files from a backup, you encounter an error:

Error extracting /home/username/backups/backup/home.tar.zst : /bin/tar: ./.cagefs/tmp/mysql.sock: Cannot create symlink to ‘/var/lib/mysql/mysql.sock’: Permission denied

Environment

• CageFS
• CloudLinux OS
• DirectAdmin

Solution

1. Perhaps you have configured symlink protection.
2. You can check this with the following command:

sysctl -a | grep s.protected_

3. Disable symlink protection and try again.

Useful links

https://docs.cloudlinux.com/cloudlinux_os_kernel/#securelinks-and-link-traversal-protection