Different operations in Plesk fails with error: System error 13: Permission denied

Symptoms

• An operation in Plesk interface fails with a Permission denied error:

  PLESK_ERROR: Unable to read components configuration from the service node: sh: /usr/local/psa/admin/bin/packagemng: Permission denied

  ---

  PLESK_ERROR: ifmng: execve failed for /usr/local/psa/admin/sbin/ifmng: Permission denied
  System error 13: Permission denied

  ---

  PLESK_ERROR: ERROR: Service_Agent_Exception
  Unable to execute php_handlers_control: php_handlers_control: execve failed for /usr/local/psa/admin/sbin/php_handlers_control: Permission denied
  System error 13: Permission denied

  ---

  PLESK_ERROR: ERROR: PleskUtilException
  mailmng-server failed: mailmng-server: execve failed for /usr/local/psa/admin/sbin/mailmng-server: Permission denied
  System error 13: Permission denied

  ---

  PLESK_ERROR: Internal error: mailmng-mailname failed: Unable to open dir /var/qmail/mailnames/example.com/test/@attachments: Permission denied System error 13: Permission denied

  ---

  PLESK_ERROR: lsws_cmd: execve failed for /usr/local/psa/admin/sbin/modules//litespeed/lsws_cmd: Permission denied

  ---

  PLESK_ERROR: ERROR: PleskFatalException: StatInfo->getProductVersion failed: sysinfo failed: sysinfo: execve failed for /usr/local/psa/admin/sbin/sysinfo: Permission denied

• Migration pre-check fails with the following error:

  PLESK_ERROR: COMMAND: ‘/usr/local/psa/admin/sbin/modules/panel-migrator/plesk-migrator’ ‘generate-migration-list’ ‘/usr/local/psa/var/modules/panel-migrator/sessions/20171101170413/config.ini’ ‘–migration-list-format=json’ ‘–migration-list-file=/usr/local/psa/var/modules/panel-migrator/sessions/20171101170413/migration-list-raw.json’ ‘–skip-services-checks’ ‘–include-existing-subscriptions’ ‘–async’ ‘–overwrite’ ‘–reload-source-data’ EXIT CODE: 126 STDOUT: STDERR: sh: /usr/local/psa/admin/bin/modules/panel-migrator/plesk-migrator: Permission denied

Cause

Plesk service cannot execute a backend utility or the utility is unable to change some files due to incorrect permissions.

Resolution

1. Connect to the server via SSH.

2. Make sure that the following files have the proper permissions and owners:

   # ls -al /usr/local/psa/admin/sbin/*wrapper
   -r-s–x— 1 root psaadm 13120 Jun 13 21:51 ./admin/sbin/mod_wrapper
   -r-s–x— 1 root psaadm 13632 Jun 13 21:51 ./admin/sbin/wrapper

3. If permissions above are not correct use the following commands to fix them :

   # cd /usr/local/psa/
   # chown root:psaadm ./admin/sbin/*wrapper
   # chmod 4510 ./admin/sbin/*wrapper

4. Make sure that the correct permissions are set to all the directories below:

   # ls -ld /usr/local/psa/admin/sbin/
   drwxr-xr-x 3 root root 4096 Sep 22 03:28 /usr/local/psa/admin/sbin/

   # ls -ld /usr/local/psa/admin/
   drwxr-xr-x 18 root root 4096 Aug 11 2014 /usr/local/psa/admin/

   # ls -ld /usr/local/psa/
   drwxr-xr-x 15 root root 4096 Sep 14 05:27 /usr/local/psa/

   # ls -ld /usr/local/
   drwxr-xr-x 14 root root 4096 Aug 19 11:35 /usr/local/

   # ls -ld /usr/
   drwxr-xr-x 13 root root 4096 Jul 6 16:48 /usr/

   # ls -ld /
   dr-xr-xr-x 20 root root 4096 Oct 28 12:40 /

5. Make sure that the correct permissions are set to the following folder as also:

   • For Centos 7:

     # ls -ld /bin
     lrwxrwxrwx 1 root root 7 Mar 8 2017 /bin -> usr/bin

     # ls -ld /usr/bin/
     dr-xr-xr-x. 2 root root 28672 Apr 18 20:29 /usr/bin/

   • For other OSes:

     # ls -ld /bin
     dr-xr-xr-x 2 root root 4096 Mar 16 03:20 /bin