折腾：
【已解决】CentOS中如何用systemctl管理supervisor包括设置supervisor开机启动
搜到了：
How To Use Systemctl to Manage Systemd Services and Units | DigitalOcean
之前是已经知道了基本用法：
<code>systemctl status xxx systemctl start xxx systemctl stop xxx systemctl restart xxx systemctl reload xxx systemctl enable xxx systemctl disable xxx systemctl is-enabled xxx systemctl is-active xxx </code>
但是更高级的，不知道，所以继续去学习学习，和systemctl有关的东西：
systemctl cat
<code>[root@xx-general-01 robotDemo]# systemctl cat supervisord # /usr/lib/systemd/system/supervisord.service [Unit] Description=Process Monitoring and Control Daemon After=rc-local.service nss-user-lookup.target [Service] Type=forking ExecStart=/usr/bin/supervisord -c /etc/supervisord.conf [Install] WantedBy=multi-user.target [root@xx-general-01 robotDemo]# ll /usr/lib/systemd/system/supervisord.service -rw-r--r-- 1 root root 221 Jul 29 2017 /usr/lib/systemd/system/supervisord.service </code>
看看list-dependencies：
<code>[root@xx-general-01 robotDemo]# systemctl list-dependencies supervisord supervisord.service ● ├─system.slice ● └─basic.target ● ├─microcode.service ● ├─rhel-autorelabel-mark.service ● ├─rhel-autorelabel.service ● ├─rhel-configure.service ● ├─rhel-dmesg.service ● ├─rhel-loadmodules.service ● ├─[email protected] ● ├─paths.target ● ├─slices.target ● │ ├─-.slice ● │ └─system.slice ● ├─sockets.target ● │ ├─dbus.socket ● │ ├─systemd-initctl.socket ● │ ├─systemd-journald.socket ● │ ├─systemd-shutdownd.socket ● │ ├─systemd-udevd-control.socket ● │ └─systemd-udevd-kernel.socket ● ├─sysinit.target ● │ ├─dev-hugepages.mount ● │ ├─dev-mqueue.mount ● │ ├─kmod-static-nodes.service ● │ ├─plymouth-read-write.service ● │ ├─plymouth-start.service ● │ ├─proc-sys-fs-binfmt_misc.automount ● │ ├─sys-fs-fuse-connections.mount ● │ ├─sys-kernel-config.mount ● │ ├─sys-kernel-debug.mount ● │ ├─systemd-ask-password-console.path ● │ ├─systemd-binfmt.service ● │ ├─systemd-firstboot.service ● │ ├─systemd-hwdb-update.service ● │ ├─systemd-journal-catalog-update.service ● │ ├─systemd-journal-flush.service ● │ ├─systemd-journald.service ● │ ├─systemd-machine-id-commit.service ● │ ├─systemd-modules-load.service ● │ ├─systemd-random-seed.service ● │ ├─systemd-sysctl.service ● │ ├─systemd-tmpfiles-setup-dev.service ● │ ├─systemd-tmpfiles-setup.service ● │ ├─systemd-udev-trigger.service ● │ ├─systemd-udevd.service ● │ ├─systemd-update-done.service ● │ ├─systemd-update-utmp.service ● │ ├─systemd-vconsole-setup.service ● │ ├─cryptsetup.target ● │ ├─local-fs.target ● │ │ ├─-.mount ● │ │ ├─rhel-import-state.service ● │ │ ├─rhel-readonly.service ● │ │ ├─systemd-fsck-root.service ● │ │ └─systemd-remount-fs.service ● │ └─swap.target ● └─timers.target ● └─systemd-tmpfiles-clean.timer [root@xx-general-01 robotDemo]# </code>
再去看看show：
<code>[root@xx-general-01 robotDemo]# systemctl show supervisord
Type=forking
Restart=no
NotifyAccess=none
RestartUSec=100ms
TimeoutStartUSec=1min 30s
TimeoutStopUSec=1min 30s
WatchdogUSec=0
WatchdogTimestampMonotonic=0
StartLimitInterval=10000000
StartLimitBurst=5
StartLimitAction=none
FailureAction=none
PermissionsStartOnly=no
RootDirectoryStartOnly=no
RemainAfterExit=no
GuessMainPID=yes
MainPID=0
ControlPID=0
FileDescriptorStoreMax=0
StatusErrno=0
Result=exit-code
ExecMainStartTimestamp=Mon 2018-05-14 16:41:52 CST
ExecMainStartTimestampMonotonic=5390982
ExecMainExitTimestamp=Thu 2018-05-24 12:00:24 CST
ExecMainExitTimestampMonotonic=847117137605
ExecMainPID=678
ExecMainCode=1
ExecMainStatus=2
ExecStart={ path=/usr/bin/supervisord ; argv[]=/usr/bin/supervisord -c /etc/supervisord.conf ; ignore_errors=no ; start_time=[Thu 2018-05-24 13:57:01 CST] ; stop_time=[Thu 2018-05-24 13:
Slice=system.slice
MemoryCurrent=18446744073709551615
TasksCurrent=18446744073709551615
Delegate=no
CPUAccounting=no
CPUShares=18446744073709551615
StartupCPUShares=18446744073709551615
CPUQuotaPerSecUSec=infinity
BlockIOAccounting=no
BlockIOWeight=18446744073709551615
StartupBlockIOWeight=18446744073709551615
MemoryAccounting=no
MemoryLimit=18446744073709551615
DevicePolicy=auto
TasksAccounting=no
TasksMax=18446744073709551615
UMask=0022
LimitCPU=18446744073709551615
LimitFSIZE=18446744073709551615
LimitDATA=18446744073709551615
LimitSTACK=18446744073709551615
LimitCORE=18446744073709551615
LimitRSS=18446744073709551615
LimitNOFILE=4096
LimitAS=18446744073709551615
LimitNPROC=63471
LimitMEMLOCK=65536
LimitLOCKS=18446744073709551615
LimitSIGPENDING=63471
LimitMSGQUEUE=819200
LimitNICE=0
LimitRTPRIO=0
LimitRTTIME=18446744073709551615
OOMScoreAdjust=0
Nice=0
IOScheduling=0
CPUSchedulingPolicy=0
CPUSchedulingPriority=0
TimerSlackNSec=50000
CPUSchedulingResetOnFork=no
NonBlocking=no
StandardInput=null
StandardOutput=journal
StandardError=inherit
TTYReset=no
TTYVHangup=no
TTYVTDisallocate=no
SyslogPriority=30
SyslogLevelPrefix=yes
SecureBits=0
CapabilityBoundingSet=18446744073709551615
AmbientCapabilities=0
MountFlags=0
PrivateTmp=no
PrivateNetwork=no
PrivateDevices=no
ProtectHome=no
ProtectSystem=no
SameProcessGroup=no
IgnoreSIGPIPE=yes
NoNewPrivileges=no
SystemCallErrorNumber=0
RuntimeDirectoryMode=0755
KillMode=control-group
KillSignal=15
SendSIGKILL=yes
SendSIGHUP=no
Id=supervisord.service
Names=supervisord.service
Requires=basic.target
Wants=system.slice
WantedBy=multi-user.target
Conflicts=shutdown.target
Before=shutdown.target multi-user.target
After=nss-user-lookup.target system.slice rc-local.service systemd-journald.socket basic.target
Description=Process Monitoring and Control Daemon
LoadState=loaded
ActiveState=failed
SubState=failed
FragmentPath=/usr/lib/systemd/system/supervisord.service
UnitFileState=enabled
UnitFilePreset=disabled
InactiveExitTimestamp=Thu 2018-05-24 13:57:01 CST
InactiveExitTimestampMonotonic=854114362107
ActiveEnterTimestamp=Mon 2018-05-14 16:41:52 CST
ActiveEnterTimestampMonotonic=5391055
ActiveExitTimestamp=Thu 2018-05-24 12:00:24 CST
ActiveExitTimestampMonotonic=847117138092
InactiveEnterTimestamp=Thu 2018-05-24 13:57:02 CST
InactiveEnterTimestampMonotonic=854114560838
CanStart=yes
CanStop=yes
CanReload=no
CanIsolate=no
StopWhenUnneeded=no
RefuseManualStart=no
RefuseManualStop=no
AllowIsolate=no
DefaultDependencies=yes
OnFailureJobMode=replace
IgnoreOnIsolate=no
IgnoreOnSnapshot=no
NeedDaemonReload=no
JobTimeoutUSec=0
JobTimeoutAction=none
ConditionResult=yes
AssertResult=yes
ConditionTimestamp=Thu 2018-05-24 13:57:01 CST
ConditionTimestampMonotonic=854114361339
AssertTimestamp=Thu 2018-05-24 13:57:01 CST
AssertTimestampMonotonic=854114361340
Transient=no
</code>有机会，去试试：
mask
unmask
和systemctl相关的：
systemctl
daemons进程：systemd
管理系统的进程和服务
journalctl
daemons进程：journald
管理日志log management
loginctl
daemons进程：logind
管理用户会话user sessions
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