Ubuntu16.04 boots into initramfs
Solution 1
execute:
(initramfs) fsck /dev/mapper/ubuntu--vg-root
select 'y' to all 'Fix?' prompts
Note, your root partition maybe something other than /dev/mapper/ubuntu--vg-root
- modify this part appropriate to the location of your boot partition
Solution 2
It seems that you have a bad superblock. To fix this just follow the following steps:
Step 1: boot into a live CD or USB and select try ubuntu without installing options
Step 2: Press ctrl+alt+t
or open your terminal
Setp 3:
Find out your partition number by using
sudo fdisk -l|grep Linux|grep -Ev 'swap'
Then, list all superblocks by using the command:
sudo dumpe2fs /dev/sda7 | grep superblock
Replace sda7 to your drive number
You should get a similar output like this
Primary superblock at 0, Group descriptors at 1-6
Backup superblock at 32768, Group descriptors at 32769-32774
Backup superblock at 98304, Group descriptors at 98305-98310
Backup superblock at 163840, Group descriptors at 163841-163846
Backup superblock at 229376, Group descriptors at 229377-229382
Backup superblock at 294912, Group descriptors at 294913-294918
Backup superblock at 819200, Group descriptors at 819201-819206
Backup superblock at 884736, Group descriptors at 884737-884742
Backup superblock at 1605632, Group descriptors at 1605633-1605638
Backup superblock at 2654208, Group descriptors at 2654209-2654214
Backup superblock at 4096000, Group descriptors at 4096001-4096006
Backup superblock at 7962624, Group descriptors at 7962625-7962630
Backup superblock at 11239424, Group descriptors at 11239425-11239430
Backup superblock at 20480000, Group descriptors at 20480001-20480006
Backup superblock at 23887872, Group descriptors at 23887873-23887878
Choose an alternate superblock from this list, for this case alternate superblock # 32768
Now, to check and repair a Linux file system using alternate superblock # 32768:
sudo fsck -b 32768 /dev/sda7 -y
The -y
flag is used to skip all the Fix? questions and to answer them all with a yes automatically
You should get similar output like this:
fsck 1.40.2 (12-Jul-2007)
e2fsck 1.40.2 (12-Jul-2007)
/dev/sda2 was not cleanly unmounted, check forced.
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
Free blocks count wrong for group #241 (32254, counted=32253).
Fix? yes
Free blocks count wrong for group #362 (32254, counted=32248).
Fix? yes
Free blocks count wrong for group #368 (32254, counted=27774).
Fix? yes
..........
/dev/sda2: ***** FILE SYSTEM WAS MODIFIED *****
/dev/sda2: 59586/30539776 files (0.6% non-contiguous), 3604682/61059048 blocks
Now try mounting the partition
sudo mount /dev/sda7 /mnt
Now, try to browse the filesystem with the following commands
cd /mnt
sudo mkdir test
ls -l
If you are able to perform the above commands, you have most probably fixed your problem.
Now, restart you computer and you should be able to boot normally.
(Source)
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Julio Vargas DelaTorre
Updated on September 18, 2022Comments
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Julio Vargas DelaTorre over 1 year
Ubuntu doesn't boot up and it goes into initramfs. I am writing from a live CD trial session. what should I do?
I understand that the boot flow is broken and that when the files from root are going to be loaded into the ram, it does not find the files in the root directory. Please correct me if I'm wrong.
The following is the output from ashell as I input the "
exit
" command:(initramfs) exit /dev/mapper/ubuntu--vg-root contains a file system with errors, check forced. Inodes that were part of a corrupted orphan linked list found. /dev/mapper/ubuntu-vg-root: UNEXPECTED INCONSISTENCY; Run fsck MANUALLY. (i.e., without -a or -p options) fsck exited with status code 4. The root file system on /dev/mapper/ubuntu--vg-root requires manual fsck
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Admin almost 8 yearsTry what it says —
fsck /dev/mapper/ubuntu-vg-root
. If it fails, trysudo fsck /dev/mapper/ubuntu-vg-root
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Julio Vargas DelaTorre almost 8 years@BharadwajRaju!! it worked, it did what I knew it had to be done, I just didn't know what/how to do it. Thanks! How does the file system gets damaged/corrupted? Also, how does the fcsk command knows what the file system looks like?
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Admin almost 8 yearsI'm not exactly sure about how it got damaged, but I can explain
fsck
's rather interesting name — it stands for File System Check. It doesn't know how it should look like, it just recovers any lost data and updates the filesystem's record.
-
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knocte over 7 yearswhat if
sudo fdisk -l|grep Linux|grep -Ev 'swap'
returns 2 lines? /dev/sda2 and /dev/sda5 for me -
Soren A over 7 yearsThere are no need to boot into live Ubuntu. Just run the fsck at the prompt where you are. No need to complicate at task unnecessary.
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Marcelo Gumiero about 7 yearsI really could boot my laptop after doing your command above. Thank you!
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Daniel almost 7 yearsI also got a few clear inode requests and said
y
to all. After it ended I entered the commandexit
to go to the login screen and everything appears to be there. -
Reinsbrain almost 7 yearsNote, your root partition maybe something other than "/dev/mapper/ubuntu--vg-root" - modify this part appropriate to the location of your boot partition
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Smile over 6 yearsThe filesystem is mounted. If you continue you WILL cause *** SEVERE*** filesystem damage. you know about this?
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iWizard over 5 yearssaved my life, thank you very much. beer?
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user3757405 over 5 yearsWhat makes this look like a "bad superblock" problem? Probably just running
fsck
is what fixes the problem in most cases. -
DanielTheRocketMan about 4 yearsYour solution was the only one worked for me!