Ubuntu18.04初始的systemd service

Ubuntu18.04初始的systemd service

两个位置

1. /etc/systemd/system

root@dev2:~# ls /etc/systemd/system
aliyun.service getty.target.wants ntp.service syslog.service
chronyd.service graphical.target.wants ntp-systemd-netif.path systemd-resolved.service.wants
dbus-org.freedesktop.network1.service multi-user.target.wants sockets.target.wants timers.target.wants
dbus-org.freedesktop.resolve1.service network-online.target.wants sshd.service
default.target.wants network-pre.target.wants sysinit.target.wants


1. /lib/systemd/system

root@dev2:~# ls /lib/systemd/system
accounts-daemon.service motd.service sys-fs-fuse-connections.mount
apparmor.service mountall-bootclean.service sysinit.target
apt-daily.service mountall.service sysinit.target.wants
apt-daily.timer mountdevsubfs.service sys-kernel-config.mount
apt-daily-upgrade.service mountkernfs.service sys-kernel-debug.mount
apt-daily-upgrade.timer mountnfs-bootclean.service syslog.socket
atd.service mountnfs.service sysstat.service
autovt@.service multi-user.target systemd-ask-password-console.path
basic.target multi-user.target.wants systemd-ask-password-console.service
bluetooth.target netplan-wpa@.service systemd-ask-password-plymouth.path
bootlogd.service networkd-dispatcher.service systemd-ask-password-plymouth.service
bootlogs.service network-online.target systemd-ask-password-wall.path
bootmisc.service network-pre.target systemd-ask-password-wall.service
checkfs.service network.target systemd-backlight@.service
checkroot-bootclean.service nscd.service systemd-binfmt.service
checkroot.service nss-lookup.target systemd-exit.service
chrony-dnssrv@.service nss-user-lookup.target systemd-fsckd.service
chrony-dnssrv@.timer ondemand.service systemd-fsckd.socket
chrony.service paths.target systemd-fsck-root.service
cloud-config.service plymouth-halt.service systemd-fsck@.service
cloud-config.target plymouth-kexec.service systemd-halt.service
cloud-final.service plymouth-log.service systemd-hibernate-resume@.service
cloud-init-local.service plymouth-poweroff.service systemd-hibernate.service
cloud-init.service plymouth-quit.service systemd-hostnamed.service
console-getty.service plymouth-quit-wait.service systemd-hwdb-update.service
console-setup.service plymouth-read-write.service systemd-hybrid-sleep.service
container-getty@.service plymouth-reboot.service systemd-initctl.service
cron.service plymouth.service systemd-initctl.socket
cryptdisks-early.service plymouth-start.service systemd-journald-audit.socket
cryptdisks.service plymouth-switch-root.service systemd-journald-dev-log.socket
cryptsetup-pre.target poweroff.target systemd-journald.service
cryptsetup.target poweroff.target.wants systemd-journald.socket
ctrl-alt-del.target printer.target systemd-journal-flush.service
dbus-org.freedesktop.hostname1.service procps.service systemd-kexec.service
dbus-org.freedesktop.locale1.service proc-sys-fs-binfmt_misc.automount systemd-localed.service
dbus-org.freedesktop.login1.service proc-sys-fs-binfmt_misc.mount systemd-logind.service
dbus-org.freedesktop.timedate1.service quotaon.service systemd-machine-id-commit.service
dbus.service rc-local.service systemd-modules-load.service
dbus.socket rc.local.service systemd-networkd.service
debug-shell.service rc-local.service.d systemd-networkd.socket
default.target rc.service systemd-networkd-wait-online.service
dev-hugepages.mount rcS.service systemd-poweroff.service
dev-mqueue.mount reboot.service systemd-quotacheck.service
ecs_mq.service reboot.target systemd-random-seed.service
emergency.service reboot.target.wants systemd-reboot.service
emergency.target remote-cryptsetup.target systemd-remount-fs.service
exit.target remote-fs-pre.target systemd-resolved.service
final.target remote-fs.target systemd-rfkill.service
friendly-recovery.service rescue.service systemd-rfkill.socket
friendly-recovery.target rescue.target systemd-suspend.service
fstrim.service rescue.target.wants systemd-suspend-then-hibernate.service
fstrim.timer resolvconf-pull-resolved.path systemd-sysctl.service
fuse.service resolvconf-pull-resolved.service systemd-timedated.service
getty-pre.target resolvconf.service systemd-timesyncd.service
getty@.service rmnologin.service systemd-tmpfiles-clean.service
getty-static.service rpcbind.target systemd-tmpfiles-clean.timer
getty.target rsync.service systemd-tmpfiles-setup-dev.service
getty.target.wants rsyslog.service systemd-tmpfiles-setup.service
graphical.target runlevel0.target systemd-udevd-control.socket
graphical.target.wants runlevel1.target systemd-udevd-kernel.socket
halt.service runlevel1.target.wants systemd-udevd.service
halt.target runlevel2.target systemd-udev-settle.service
halt.target.wants runlevel2.target.wants systemd-udev-trigger.service
hibernate.target runlevel3.target systemd-update-utmp-runlevel.service
hostname.service runlevel3.target.wants systemd-update-utmp.service
hwclock.service runlevel4.target systemd-user-sessions.service
hybrid-sleep.target runlevel4.target.wants systemd-volatile-root.service
initrd-cleanup.service runlevel5.target system.slice
initrd-fs.target runlevel5.target.wants system-update-cleanup.service
initrd-parse-etc.service runlevel6.target system-update.target
initrd-root-device.target sendsigs.service timers.target
initrd-root-fs.target serial-getty@.service timers.target.wants
initrd-switch-root.service setvtrgb.service time-sync.target
initrd-switch-root.target shutdown.target udev.service
initrd-switch-root.target.wants sigpwr.target ufw.service
initrd.target single.service umountfs.service
initrd-udevadm-cleanup-db.service sleep.target umountnfs.service
irqbalance.service slices.target umountroot.service
kexec.target smartcard.target umount.target
kexec.target.wants sockets.target urandom.service
keyboard-setup.service sockets.target.wants ureadahead.service
killprocs.service sound.target ureadahead-stop.service
kmod.service ssh.service ureadahead-stop.timer
kmod-static-nodes.service ssh@.service user@.service
local-fs-pre.target ssh.socket user@.service.d
local-fs.target stop-bootlogd.service user.slice
local-fs.target.wants stop-bootlogd-single.service uuidd.service
machine.slice sudo.service uuidd.socket
module-init-tools.service suspend.target x11-common.service
motd-news.service suspend-then-hibernate.target
motd-news.timer swap.target