I am running Linux Mint 18 and I have followed the instructions here:
https://forums.plex.tv/discussion/222214/how-to-move-plexs-data-on-linux#latest
When I try to start plex, I get the following message:
Job for plexmediaserver.service failed because the control process exited with error code. See "systemctl status plexmediaserver.service" and "journalctl -xe" for details.
journalctl -xe shows the following:
Jun 24 10:34:27 Misato systemd[1]: Starting Plex Media Server for Linux...
-- Subject: Unit plexmediaserver.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit plexmediaserver.service has begun starting up.
Jun 24 10:34:27 Misato sh[21840]: /bin/mkdir: cannot create directory ‘/var/lib/plexmediaserver/Library’: Permission denied
Jun 24 10:34:27 Misato systemd[1]: plexmediaserver.service: Control process exited, code=exited status=1
Jun 24 10:34:27 Misato systemd[1]: Failed to start Plex Media Server for Linux.
-- Subject: Unit plexmediaserver.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit plexmediaserver.service has failed.
--
-- The result is failed.
Jun 24 10:34:27 Misato systemd[1]: plexmediaserver.service: Unit entered failed state.
Jun 24 10:34:27 Misato systemd[1]: plexmediaserver.service: Failed with result 'exit-code'.
Jun 24 10:34:27 Misato sudo[21837]: pam_unix(sudo:session): session closed for user root
Jun 24 10:34:32 Misato systemd[1]: plexmediaserver.service: Service hold-off time over, scheduling restart.
Jun 24 10:34:32 Misato systemd[1]: Stopped Plex Media Server for Linux.
-- Subject: Unit plexmediaserver.service has finished shutting down
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit plexmediaserver.service has finished shutting down.
Jun 24 10:34:32 Misato systemd[1]: Starting Plex Media Server for Linux...
-- Subject: Unit plexmediaserver.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit plexmediaserver.service has begun starting up.
Jun 24 10:34:32 Misato sh[21847]: /bin/mkdir: cannot create directory ‘/var/lib/plexmediaserver/Library’: Permission denied
Jun 24 10:34:32 Misato systemd[1]: plexmediaserver.service: Control process exited, code=exited status=1
Jun 24 10:34:32 Misato systemd[1]: Failed to start Plex Media Server for Linux.
-- Subject: Unit plexmediaserver.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit plexmediaserver.service has failed.
--
-- The result is failed.
Jun 24 10:34:32 Misato systemd[1]: plexmediaserver.service: Unit entered failed state.
Jun 24 10:34:32 Misato systemd[1]: plexmediaserver.service: Failed with result 'exit-code'.
systemctl status plexmediaserver.service:
● plexmediaserver.service - Plex Media Server for Linux
Loaded: loaded (/lib/systemd/system/plexmediaserver.service; enabled; vendor preset: enabled)
Active: inactive (dead) (Result: exit-code) since Sat 2017-06-24 10:34:42 CDT; 5min ago
Process: 21252 ExecStart=/bin/sh -c LD_LIBRARY_PATH=/usr/lib/plexmediaserver "/usr/lib/plexmediaserver/Plex Media Server" (code=killed, signal=TERM)
Process: 21857 ExecStartPre=/bin/sh -c /usr/bin/test -d "${PLEX_MEDIA_SERVER_APPLICATION_SUPPORT_DIR}" || /bin/mkdir -p "${PLEX_MEDIA_SERVER_APPLICATION_SUPPORT_DIR}" (code=exited, status=1/FAILURE)
Main PID: 21252 (code=killed, signal=TERM)
Jun 24 10:34:37 Misato systemd[1]: Failed to start Plex Media Server for Linux.
Jun 24 10:34:37 Misato systemd[1]: plexmediaserver.service: Unit entered failed state.
Jun 24 10:34:37 Misato systemd[1]: plexmediaserver.service: Failed with result 'exit-code'.
Jun 24 10:34:42 Misato systemd[1]: plexmediaserver.service: Service hold-off time over, scheduling restart.
Jun 24 10:34:42 Misato systemd[1]: Stopped Plex Media Server for Linux.
Jun 24 10:34:42 Misato systemd[1]: plexmediaserver.service: Start request repeated too quickly.
Jun 24 10:34:42 Misato systemd[1]: Failed to start Plex Media Server for Linux.
Seems to me that plex trying to create ‘/var/lib/plexmediaserver/Library’ when it already exists.