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I run Ubuntu in a virtual machine and I've managed to reset my password in recovery mode, by editing the parameters according to these instructions on Summarizing my steps:

I changed ro single at the end of the line beginning with Linux to rw init=/bin/bash, while booting, then using the command passwd <username>, entered the new password twice. The password is reported to be updated successfully.

However, when I try to reboot the system nothing happens. I tried the command reboot, but it does not work. If I type exit I get kernel panic.

Any tips on how to proceed?

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can you try sudo shutdown -h now and sudo reboot? – don.joey Jan 5 '13 at 15:22
Thanks. I get "sudo: unable to resolve host (none)" from both of those commands. – forumuser Jan 5 '13 at 15:31
can you type hostname? – don.joey Jan 5 '13 at 15:40
hostname gives me "(none)" – forumuser Jan 5 '13 at 17:16
up vote 2 down vote accepted

Try telinit 6 you don't need sudo since your in single user mode.


If it wont reboot using the standard tools there is a way to do it straight through to the kernel, however this does not close file systems nicely.

Found this here

you must activate the magic SysRq option:

echo 1 > /proc/sys/kernel/sysrq

When you are ready to reboot the machine simply run the following:

echo b > /proc/sysrq-trigger

This does not attempt to unmount or sync filesystems, so it should only be used when absolutely necessary..

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When I do init 6 I get " Failed to connect to socket /com/ubuntu/upstart: Connection refused" – forumuser Jan 5 '13 at 17:15
@forumuser update answer try this one. – squarebear Jan 5 '13 at 17:43
I'm afraid I get the same error message – forumuser Jan 5 '13 at 17:55
@forumuser how strange.... edited again. – squarebear Jan 5 '13 at 18:04
Thanks, that actually worked!! – forumuser Jan 5 '13 at 21:20

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