SOLVED: I restarted my server from web (button), but failed to restart.

[TheDreadPirate]

Thank you. But even then, by default /etc/systemd/system/jellyfin.service appeared like this.

Code:

  GNU nano 6.2                                                                                            /etc/systemd/system/jellyfin.service                                                                                                     
[Unit]
Description=Jellyfin
After=network.target

[Service]
Type=simple
User=ubuntu
Restart=always
ExecStart=/opt/jellyfin/jellyfin.sh

[Install]
WantedBy=multi-user.target

ExecStart where should point at?

That file should not exist in a "one-liner" install.  A package/one-liner install will create this file.

/etc/systemd/system/multi-user.target.wants/jellyfin.service

Which looks like this.

Code:

[Unit]
Description = Jellyfin Media Server
After = network-online.target

[Service]
Type = simple
EnvironmentFile = /etc/default/jellyfin
User = jellyfin
Group = jellyfin
WorkingDirectory = /var/lib/jellyfin
ExecStart = /usr/bin/jellyfin $JELLYFIN_WEB_OPT $JELLYFIN_FFMPEG_OPT $JELLYFIN_SERVICE_OPT $JELLYFIN_NOWEBAPP_OPT $JELLYFIN_ADDITIONAL_OPTS
Restart = on-failure
TimeoutSec = 15
SuccessExitStatus=0 143

[Install]
WantedBy = multi-user.target