查看开机启动项
//查询开机启动项
systemctl list-unit-files
// 输出 UNIT FILE 对应服务名；STATE 是状态：enable 是开机启动，disable是开机不启动
UNIT FILE STATE
proc-sys-fs-binfmt_misc.automount static
dev-hugepages.mount static
dev-mqueue.mount static
proc-fs-nfsd.mount static
proc-sys-fs-binfmt_misc.mount static
sys-fs-fuse-connections.mount static
sys-kernel-config.mount static
sys-kernel-debug.mount static
tmp.mount disabled
var-lib-nfs-rpc_pipefs.mount static
brandbot.path disabled
cups.path enabled
下面以nfs服务为例：
1.启动nfs服务
systemctl start nfs-server.service
2.设置开机自启动
systemctl enable nfs-server.service
3.停止开机自启动
systemctl disable nfs-server.service
4.查看服务当前状态
systemctl status nfs-server.service
5.重新启动某服务
systemctl restart nfs-server.service
6.查看所有已启动的服务
systemctl list-unit-files | grep enabled
