我有一台工作笔记本电脑 Lenovo P51。安全分区上有 Win10。我也在安全分区上安装了 Ubuntu 18.04。另外，我已经创建了一个用于交换的安全分区，但它没有安装。启动时间大约2分钟，这很烦人
这是须藤块输出并且没有用于交换的安全分区（我认为它应该看起来像/dev/mapper/nvme0n1p6）
$ sudo blkid
/dev/mapper/nvme0n1p7_crypt: UUID="94fe7730-b54e-43a6-be1c-ec4c1fcec084" TYPE="ext4"
/dev/nvme0n1p1: LABEL="BOOT" UUID="56A4-3F33" TYPE="vfat" PARTLABEL="EFI system partition" PARTUUID="b2acdb69-298e-4720-8368-30a86df0d055"
/dev/nvme0n1p4: LABEL="DATA" UUID="160E3B620E3B3A57" TYPE="ntfs" PARTLABEL="Basic data partition" PARTUUID="e05129b9-f57e-48b3-8502-ad7129883615"
/dev/nvme0n1p5: UUID="95aa2c8c-2cd1-4fef-8dc3-c93a896e9f15" TYPE="ext4" PARTUUID="f12911aa-86cc-4d9a-8117-39fd5a31bd8e"
/dev/nvme0n1p7: UUID="20adda12-da97-4c79-af97-cb69a7a4af00" TYPE="crypto_LUKS" PARTUUID="26e3155a-aee1-4185-82d2-a4d41d6cee6c"
/dev/loop0: TYPE="squashfs"
/dev/loop1: TYPE="squashfs"
/dev/loop2: TYPE="squashfs"
/dev/loop3: TYPE="squashfs"
/dev/loop4: TYPE="squashfs"
/dev/loop5: TYPE="squashfs"
/dev/loop6: TYPE="squashfs"
/dev/loop7: TYPE="squashfs"
/dev/loop8: TYPE="squashfs"
/dev/loop9: TYPE="squashfs"
/dev/loop10: TYPE="squashfs"
/dev/loop11: TYPE="squashfs"
/dev/loop12: TYPE="squashfs"
/dev/loop13: TYPE="squashfs"
/dev/loop14: TYPE="squashfs"
/dev/loop15: TYPE="squashfs"
/dev/nvme0n1: PTUUID="71954aea-d40f-480d-ad82-e574d4960a4d" PTTYPE="gpt"
/dev/nvme0n1p2: PARTLABEL="Microsoft reserved partition" PARTUUID="db7c9553-7b2e-4b8d-acd4-b04a66af3bc2"
/dev/nvme0n1p3: PARTLABEL="Basic data partition" PARTUUID="cc57510d-4af0-4c72-9233-e2acf8b439d6"
/dev/nvme0n1p6: PARTUUID="00d5b8ac-276c-4662-acfc-16f9b3eaa098"
和系统表内容：
$ sudo cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
UUID=94fe7730-b54e-43a6-be1c-ec4c1fcec084 / ext4 errors=remount-ro 0 1
# /boot was on /dev/nvme0n1p5 during installation
UUID=95aa2c8c-2cd1-4fef-8dc3-c93a896e9f15 /boot ext4 defaults 0 2
# /boot/efi was on /dev/nvme0n1p1 during installation
UUID=56A4-3F33 /boot/efi vfat umask=0077 0 1
# /media/DATA was on /dev/nvme0n1p4 during installation
UUID=160E3B620E3B3A57 /media/DATA ntfs defaults,umask=007,gid=46 0 0
#/dev/mapper/nvme0n1p6_crypt none swap sw 0 0
UPD。取消注释最后一行系统表（但它没有解决任何问题）
$ sudo swapon -a
swapon: cannot open /dev/mapper/nvme0n1p6_crypt: No such file or directory
发现这个在/var/log/系统日志
Aug 22 14:41:15 ThinkPad-P51 dockerd[1973]: time="2018-08-22T14:41:15.630102414+02:00" level=warning msg="Your kernel does not support swap memory limit"
Aug 22 14:42:38 ThinkPad-P51 systemd[1]: dev-mapper-nvme0n1p6_crypt.swap: Job dev-mapper-nvme0n1p6_crypt.swap/start failed with result 'dependency'.
UPD2。lsblk-f输出：
NAME FSTYPE LABEL UUID MOUNTPOINT
loop0 squashfs /snap/gnome-calculator/199
loop1 squashfs /snap/canonical-livepatch/41
loop2 squashfs /snap/gnome-system-monitor/51
loop3 squashfs /snap/gimp/40
loop4 squashfs /snap/gnome-logs/37
loop5 squashfs /snap/gnome-system-monitor/36
loop6 squashfs /snap/gnome-3-26-1604/59
loop7 squashfs /snap/gtk-common-themes/319
loop8 squashfs /snap/canonical-livepatch/42
loop9 squashfs /snap/gnome-logs/25
loop10 squashfs /snap/gnome-logs/40
loop11 squashfs /snap/gnome-characters/103
loop12 squashfs /snap/gnome-calculator/180
loop13 squashfs /snap/gnome-characters/117
loop14 squashfs /snap/core/4486
loop15 squashfs /snap/gnome-system-monitor/54
loop16 squashfs /snap/gnome-characters/69
loop17 squashfs /snap/gnome-calculator/154
loop18 squashfs /snap/core/5145
loop19 squashfs /snap/gnome-3-26-1604/70
nvme0n1
├─nvme0n1p1 vfat BOOT 56A4-3F33 /boot/efi
├─nvme0n1p2
├─nvme0n1p3
├─nvme0n1p4 ntfs DATA 160E3B620E3B3A57 /media/DATA
├─nvme0n1p5 ext4 95aa2c8c-2cd1-4fef-8dc3-c93a896e9f15 /boot
├─nvme0n1p6 swap 8c875a48-443f-4e04-9fd1-9a56b1da73cc [SWAP]
└─nvme0n1p7 crypto_LUKS 20adda12-da97-4c79-af97-cb69a7a4af00
└─nvme0n1p7_crypt ext4 94fe7730-b54e-43a6-be1c-ec4c1fcec084 /
UPD3。系统分析责备输出：
6.228s NetworkManager-wait-online.service
3.782s apt-daily.service
3.459s plymouth-quit-wait.service
1.751s apt-daily-upgrade.service
1.343s docker.service
847ms bolt.service
770ms fwupd.service
622ms snapd.service
506ms systemd-logind.service
496ms dev-mapper-nvme0n1p7_crypt.device
471ms nvidia-fallback.service
428ms snap-core-5145.mount
427ms snap-gnome\x2d3\x2d26\x2d1604-70.mount
407ms snap-gnome\x2dcalculator-154.mount
399ms snap-gnome\x2dsystem\x2dmonitor-54.mount
398ms snap-gnome\x2dcharacters-69.mount
384ms snap-gnome\x2dcharacters-117.mount
379ms snap-core-4486.mount
355ms snapd.seeded.service
264ms snap-gnome\x2dcalculator-180.mount
246ms snap-gnome\x2dcharacters-103.mount
244ms dev-loop0.device
231ms dev-loop3.device
227ms dev-loop2.device
218ms dev-loop1.device
205ms dev-loop6.device
204ms NetworkManager.service
200ms dev-loop4.device
189ms dev-loop8.device
183ms dev-loop5.device
181ms dev-loop9.device
171ms dev-loop10.device
160ms snap-gnome\x2dlogs-40.mount
156ms dev-loop7.device
146ms systemd-timesyncd.service
133ms snap-canonical\x2dlivepatch-42.mount
132ms snap-gnome\x2dlogs-25.mount
129ms networkd-dispatcher.service
124ms systemd-resolved.service
116ms udisks2.service
110ms upower.service
110ms snap-gtk\x2dcommon\x2dthemes-319.mount
102ms systemd-journal-flush.service
99ms systemd-udev-trigger.service
94ms ModemManager.service
80ms snap-gnome\x2dsystem\x2dmonitor-36.mount
80ms dev-loop11.device
78ms snap-gnome\x2dlogs-37.mount
76ms snap-gnome\x2d3\x2d26\x2d1604-59.mount
75ms accounts-daemon.service
74ms dev-loop12.device
72ms apparmor.service
71ms keyboard-setup.service
70ms apport.service
66ms snap-gnome\x2dsystem\x2dmonitor-51.mount
58ms snap-gimp-40.mount
56ms snap-canonical\x2dlivepatch-41.mount
47ms systemd-journald.service
46ms thermald.service
45ms speech-dispatcher.service
45ms [email protected]
44ms [email protected]
42ms packagekit.service
42ms systemd-rfkill.service
38ms alsa-restore.service
37ms gpu-manager.service
36ms avahi-daemon.service
35ms grub-common.service
35ms systemd-fsck@dev-disk-by\x2duuid-56A4\x2d3F33.service
32ms systemd-udevd.service
29ms snap-gnome\x2dcalculator-199.mount
25ms rsyslog.service
24ms wpa_supplicant.service
23ms systemd-fsck@dev-disk-by\x2duuid-95aa2c8c\x2d2cd1\x2d4fef\x2d8dc3\x2dc93a896e9f15.service
22ms pppd-dns.service
22ms bluetooth.service
21ms networking.service
19ms media-DATA.mount
16ms ureadahead-stop.service
16ms gdm.service
16ms systemd-modules-load.service
14ms colord.service
14ms plymouth-start.service
13ms plymouth-read-write.service
13ms systemd-tmpfiles-clean.service
12ms dns-clean.service
12ms polkit.service
12ms systemd-tmpfiles-setup-dev.service
11ms systemd-tmpfiles-setup.service
10ms kmod-static-nodes.service
9ms systemd-remount-fs.service
9ms dev-hugepages.mount
8ms docker.socket
8ms kerneloops.service
7ms boot.mount
7ms sys-kernel-debug.mount
7ms systemd-sysctl.service
6ms systemd-update-utmp-runlevel.service
6ms dev-mqueue.mount
6ms dev-loop13.device
6ms dev-disk-by\x2duuid-8c875a48\x2d443f\x2d4e04\x2d9fd1\x2d9a56b1da73cc.swap
6ms boot-efi.mount
5ms ufw.service
5ms systemd-update-utmp.service
5ms dev-loop15.device
4ms systemd-cryptsetup@nvme0n1p7_crypt.service
4ms systemd-user-sessions.service
4ms systemd-backlight@backlight:intel_backlight.service
4ms console-setup.service
4ms dev-loop18.device
4ms systemd-backlight@leds:tpacpi::kbd_backlight.service
3ms dev-loop19.device
3ms systemd-random-seed.service
3ms dev-loop16.device
3ms dev-loop17.device
3ms sys-kernel-config.mount
2ms dev-loop14.device
2ms rtkit-daemon.service
2ms sys-fs-fuse-connections.mount
2ms setvtrgb.service
1ms snapd.socket
答案1
启动时未安装安全分区上的交换
但是......交换分区在您的注释中/etc/fstab：
#/dev/mapper/nvme0n1p6_crypt none swap sw 0 0
以 开头的行#不会被读取。