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Questions tagged [recovery-mode]

Questions about using and getting tasks done with the command line recovery mode.

In case a system fails to boot for some reason, recovery mode can be used to boot into the system (sometimes a quicker alternative to using a CD/DVD etc. for recovery operations). This mode just loads some basic services and gives a command line mode and tasks can/will be done as root (the superuser). System repair can be done using command line tools.

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How do I boot into a root shell?

When booting to the graphical desktop fails we sometimes are recommended to boot into a "root shell" or to boot in "recovery mode". How do I do that?
Takkat
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Cannot lock '/etc/group' in recovery mode

I've currently booted into recovery mode, because I removed my sole user from admin :/ When I run adduser oadams admin, I get gpasswd: cannot lock /etc/group; try again later. For what it's worth, ls /etc/ | grep "lock", returns only mtab.fuselock,…
oadams
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Unable to mount filesystem as read-write in recovery mode

I deleted two unused user accounts. Now I am unable to login even into my own account. I rebooted in recovery mode in the root shell and tried to restore the back-up of /etc/passwd. However, the filesystem is read-only! I can only access root shell…
Louis
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fsck e2fsck: Cannot continue, aborting

When I tried to run fsck on Ubuntu 18.04 recovery-mode I got the following message. Can anyone tell me why? /lib/recocery-mode/recovery-menu: line 80: /etc/default/rcS: No such file or directory fsck from util-linux 2.31.1 /dev/sda4 is…
William Mills
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How to connect to internet from recovery mode?

I am working on a kernel panic issue. As Ubuntu is very reliant on internet, I am currently investigating how to connect to internet when choosing recovery mode. Even in my healthy 11.10 system it doesnt work (nor wireless, nor wired). I ticked for…
dago
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How to boot to the recovery mode if it is not listed in Grub?

I want to boot Ubuntu into recovery mode but there is no grub menu entry allowing me to do so. I pressed e and now I am able to edit boot options. It looks like that: setparams 'Ubuntu , with Linux 3.6.0-26-generic' recordfail gfxmode…
q9f
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Ubuntu 12.04 recovery mode root shell has no internet connection

I'm debugging some things on my computer and I boot into recovery mode from the grub menu. Then it gives me a bunch of options on what to do next, and I select the one that drops it to a root shell. However, apt-get complains about not being able to…
John Stimac
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Reset root password for Ubuntu 16.04 - recovery mode asks for root password

We've lost the root password from our file server from supermicro server. I tried to follow the common instructions to reboot with left shift and drop to root shell as it is described in this answer. When I choose root in this menu: Ubuntu still…
zlon
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Black screen during boot after TTY1 login

I've got a weeks-young install of 13.04 (3.8.0.29) and the computer has been powered on for a week. I turned it off for the night and now it freezes during boot. I have already checked this seemingly mandatory post as well as this one but I…
Torben Gundtofte-Bruun
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How to boot to root shell when GRUB recovery menu fails to load a shell?

Can't seem to boot into root shell in recovery mode from GRUB. I try booting into recovery mode from the GRUB menu and don't ever get a shell, just log messages from the kernel bootup. Ctrl+Alt+F1-F12 don't really give me anything important either.
Naftuli Kay
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Need to deactivate NVIDIA driver from recovery mode or using Ubuntu 12.04 install disk

I tried switching graphics drivers from 317 to 304(post-release) because it kept crashing when I wanted to move my monitor's display to the other side of the laptop display (using NVIDIA Settings) Now Ubuntu won't boot at all. It just crashes and…
dspyz
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Botched upgrade--dpkg hangs on 'Started Braille Device Support'

Screwed up an upgrade from 14.10->15.04->15.10 badly. I've been messing around in recovery mode and am confidentish that I managed to get all the broken packages/dependencies removed and reinstalled, but now I'm running into this queer issue. …
neph
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Unable to boot into 11.10 in normal (get a black screen) OR recovery (get just a flashing cursor, no cli)

Okay, so I had a dual boot of Tango Studio (based on Ubuntu 10.04) and Windows XP. Yesterday I downloaded the .iso for Ubuntu 11.10 and attempted to install from a USB (my BIOS won't normally boot from USB but I had PLOP boot manager on a CD). I…
user1092284
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USB device connecting and disconnecting repeatedly

I was having some problems booting into Ubuntu. After trying to reboot for sometime, I eventually opened the 4.4.0-31 recovery mode. while it was booting into recovery mode, it said that /dev/ubuntu-gnome-vg needs to fsck manually. While this was…
Gautam Raghuvanshi
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How to access GRUB 2 in a computer with only Ubuntu?

I want to start the Recovery mode on an Ubuntu-only machine. The problem is that machine seems to skip grub and boot directly into ubuntu (as it is the only OS installed. How can I boot into the recovery mode (whether it is through GRUB or not)
Calixte
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