부팅 시간(Boot time) 확인하기

root@localhost:/home/westporch# systemd-analyze time
Startup finished in 2.217s (kernel) + 1.661s (userspace) = 3.878s
root@localhost:/home/westporch# 

root@localhost:/home/westporch# systemd-analyze blame
           870ms networking.service
           719ms kbd.service
           262ms exim4.service
           201ms NetworkManager.service
           176ms keyboard-setup.service
           171ms ModemManager.service
           126ms packagekit.service
           123ms console-setup.service
           119ms systemd-logind.service
            86ms alsa-restore.service
            85ms openvpn.service
            81ms nfs-common.service
            81ms pppd-dns.service
            79ms rc-local.service
            77ms sysstat.service
            77ms speech-dispatcher.service
            70ms avahi-daemon.service
            59ms systemd-tmpfiles-clean.service
            37ms systemd-tmpfiles-setup.service
            34ms udisks2.service
            33ms rpcbind.service
            30ms systemd-journal-flush.service
            27ms dev-disk-by\x2duuid-4bfba35d\x2daebb\x2d4134\x2dae3c\x2d467dd2e5ef4b.swap
            27ms rsyslog.service
            24ms systemd-rfkill@rfkill0.service
            22ms rtkit-daemon.service
            20ms systemd-udev-trigger.service
            19ms upower.service
            19ms polkitd.service
            19ms kdm.service
            18ms user@1000.service
            18ms systemd-tmpfiles-setup-dev.service
            13ms systemd-setup-dgram-qlen.service
            13ms dev-hugepages.mount
            12ms systemd-rfkill@rfkill1.service
            12ms systemd-remount-fs.service
            12ms systemd-user-sessions.service
            12ms saned.service
            12ms systemd-backlight@leds:samsung::kbd_backlight.service
            11ms sys-kernel-debug.mount
            10ms systemd-random-seed.service
            10ms systemd-sysctl.service
            10ms systemd-modules-load.service
             9ms systemd-update-utmp.service
             7ms dev-mqueue.mount
             7ms systemd-backlight@backlight:intel_backlight.service
             7ms systemd-update-utmp-runlevel.service
             5ms kmod-static-nodes.service
             3ms sys-fs-fuse-connections.mount
             3ms systemd-udevd.service
             1ms systemd-rfkill@rfkill2.service
             1ms udev-finish.service
root@localhost:/home/westporch# 

root@localhost:/home/westporch# systemd-analyze plot > boot.svg
root@localhost:/home/westporch# 
root@localhost:/home/westporch# ls
Bechmark  Downloads  Git  R         imgs  systemd_txt  test    공개      문서      비디오  서식
CentOS    Gisa       PDF  boot.svg  make  temp         upload  다운로드  바탕화면  사진    음악
root@localhost:/home/westporch#