Symptoms

On an attempt of installing Plesk license the following error occurs:

    Error: error: InstanceID not required for "plesk-unix" key

OR

    Error: error: boost::filesystem::status: Permission denied: "/etc/sw/keys/instances/PLSK.xxxxxxxx.0000"

Cause

Incorrect permissions/ownership of the /etc/sw/keys/instances directory.

Resolution

Make sure that permissions are correct for /etc/sw/keys/instances :

    # ls -ld  /etc/sw/keys/instances
    drwxrws--- 2 root swkey-data 4096 Nov 27 15:07 /etc/sw/keys/instances

Use the chown/chmod command to correct them:

    # chown root:swkey-data /etc/sw/keys/instances
    # chmod 2770 /etc/sw/keys/instances