查看内核、用户空间、Unit启动时间
systemd-analyze time:查看内核、用户空间启动所需的时间
[[email protected] ~]# systemd-analyze time Startup finished in 1.068s (kernel) + 3.842s (initrd) + 52.848s (userspace) = 57.759s
systemd-analyze time:查看Unit启动所需的时间,就是系统在启动过程中在屏幕显示的信息
[[email protected] ~]# systemd-analyze blame 18.281s libvirtd.service 6.356s firewalld.service 6.194s polkit.service 6.063s systemd-udev-settle.service 5.248s kdump.service 5.075s lvm2-monitor.service 4.922s dev-mapper-centos\x2droot.device 4.524s NetworkManager-wait-online.service 4.497s gssproxy.service 4.494s ksm.service 4.358s avahi-daemon.service 4.324s rhel-dmesg.service 4.316s bluetooth.service 4.298s rsyslog.service 3.657s tuned.service 3.589s postfix.service 2.673s [email protected]:2.service 2.254s abrt-ccpp.service 1.587s ModemManager.service 1.506s proc-fs-nfsd.mount 1.380s NetworkManager.service 1.341s systemd-tmpfiles-setup-dev.service 1.229s sysstat.service 1.061s rhel-readonly.service 1.023s boot.mount 893ms sshd.service 832ms systemd-udevd.service 738ms network.service 668ms systemd-logind.service 542ms systemd-sysctl.service 531ms auditd.service 526ms sys-kernel-debug.mount 514ms kmod-static-nodes.service 420ms dev-hugepages.mount 408ms home.mount 388ms rhel-import-state.service 378ms iscsi-shutdown.service 357ms ksmtuned.service 348ms plymouth-quit.service 307ms systemd-journald.service 306ms plymouth-quit-wait.service 300ms dmraid-activation.service 273ms dev-mqueue.mount 251ms plymouth-read-write.service 234ms rpc-statd-notify.service 233ms systemd-remount-fs.service 216ms [email protected] 214ms systemd-udev-trigger.service 205ms systemd-journal-flush.service 199ms nfs-config.service 194ms systemd-random-seed.service 162ms systemd-user-sessions.service 151ms dev-mapper-centos\x2dswap.swap 141ms systemd-tmpfiles-setup.service 110ms systemd-vconsole-setup.service 107ms vsftpd.service 40ms plymouth-start.service 36ms systemd-update-utmp.service 28ms blk-availability.service 22ms systemd-fsck-root.service 14ms systemd-update-utmp-runlevel.service 11ms var-lib-nfs-rpc_pipefs.mount 6ms sys-kernel-config.mount
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