/lib/systemd/system/tor@.service is in tor 0.2.7.6-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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Description=Anonymizing overlay network for TCP (instance %i)
After=network.target nss-lookup.target
PartOf=tor.service
ReloadPropagatedFrom=tor.service
[Service]
Type=notify
NotifyAccess=all
PIDFile=/var/run/tor-instances/%i/tor.pid
PermissionsStartOnly=yes
ExecStartPre=/usr/bin/install -Z -m 02750 -o _tor-%i -g _tor-%i -d /var/run/tor-instances/%i
ExecStartPre=/bin/sed -e 's/@@NAME@@/%i/g; w /var/run/tor-instances/%i.defaults' /usr/share/tor/tor-service-defaults-torrc-instances
ExecStartPre=/usr/bin/tor --defaults-torrc /var/run/tor-instances/%i.defaults -f /etc/tor/instances/%i/torrc --verify-config
ExecStart=/usr/bin/tor --defaults-torrc /var/run/tor-instances/%i.defaults -f /etc/tor/instances/%i/torrc
ExecReload=/bin/kill -HUP ${MAINPID}
KillSignal=SIGINT
TimeoutStartSec=120
TimeoutStopSec=60
Restart=on-failure
LimitNOFILE=65536
# Hardening
NoNewPrivileges=yes
PrivateTmp=yes
PrivateDevices=yes
ProtectHome=yes
ProtectSystem=full
ReadOnlyDirectories=/
ReadWriteDirectories=-/var/lib/tor-instances
ReadWriteDirectories=-/var/run
CapabilityBoundingSet=CAP_SETUID CAP_SETGID CAP_NET_BIND_SERVICE CAP_DAC_OVERRIDE CAP_CHOWN CAP_FOWNER
[Install]
WantedBy=multi-user.target
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