質問: 起動時間の短縮 ubuntu 16.04 ltsの起動時間を可能な限り短縮しようとしています。ブート時にロードされている不要なモジュールのリストを取得する可能な方法は何ですか?編集: systemd-analyze blame出力: 3min 495ms powerd.service 18.974s networkmanager-wait-online.service 15.514s modemmanager.service 14.454s dev-sda2.device 14.223s grub-common.service 14.216s irqbalance.service 14.203s cpufreqd.service 14.184s apport.service 13.644s networking.service 13.259s accounts-daemon.service 13.077s speech-dispatcher.service 13.010s linuxlogo.service 12.434s systemd-logind.service 12.413s apmd.service 12.392s sddm.service 12.390s sysstat.service 12.371s aksusbd.service 12.366s ondemand.service 12.365s rsyslog.service 12.359s pppd-dns.service 12.353s click-system-hooks.service 12.352s gpu-manager.service 12.343s lm-sensors.service 12.341s systemd-user-sessions.service 12.340s cgroupfs-mount.service 12.333s alsa-restore.service 12.319s bluetooth.service 12.309s iio-sensor-proxy.service 11.539s ufw.service 11.380s avahi-daemon.service 11.377s thermald.service 5.141s apparmor.service 4.257s qemu-kvm.service 4.209s nmbd.service 4.147s networkmanager.service 3.567s sensord.service 3.313s quota.service 2.981s systemd-udevd.service 2.639s apt-daily.service 2.254s systemd-tmpfiles-setup-dev.service 2.235s keyboard-setup.service 2.137s kannel.service 1.775s lightdm.service 1.643s dev-loop0.device 1.621s console-setup.service 1.517s dev-loop1.device 1.466s dev-hugepages.mount 1.463s dev-loop2.device 1.405s systemd-fsck@dev-disk-by\x2duuid-14dd\x2d2000.service 1.271s binfmt-support.service 1.266s dev-mqueue.mount 1.259s sys-kernel-debug.mount 1.222s polkitd.service 1.185s boot-efi.mount 1.106s systemd-journald.service 1.049s systemd-modules-load.service 1.021s systemd-journal-flush.service 713ms systemd-random-seed.service 653ms ofono.service 642ms snap-core-4327.mount 630ms systemd-tmpfiles-setup.service 620ms snap-core-4206.mount 591ms snap-core-4110.mount 558ms dns-clean.service 554ms systemd-udev-trigger.service 551ms proc-sys-fs-binfmt_misc.mount 475ms ntp.service 453ms resolvconf.service 444ms user@1000.service 442ms dev-sda3.swap 392ms systemd-update-utmp.service 380ms systemd-backlight@backlight:intel_backlight.service 350ms tlp.service 346ms systemd-sysctl.service 251ms ssh.service 236ms setvtrgb.service 216ms sys-kernel-config.mount 214ms sys-fs-fuse-connections.mount 202ms docker.socket 193ms kmod-static-nodes.service 168ms smbd.service 164ms wpa_supplicant.service 151ms systemd-remount-fs.service 149ms systemd-tmpfiles-clean.service 120ms hddtemp.service 32ms rc-local.service 17ms plymouth-read-write.service 7ms rtkit-daemon.service 6ms postfix.service 6ms systemd-update-utmp-runlevel.service 5ms ureadahead-stop.service 4ms ubuntu-fan.service 3ms plymouth-quit-wait.service 3ms vsftpd.service
回答: それについての情報がここにあります。 https://bugs.launchpad.net/powerd/+bug/1443278 そのページで、彼らはサービスを無効にする方法を言うsudo systemctl disable powerd.service