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Linux password

Posted on 2012-12-25
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Last Modified: 2014-03-11
I have linux gno installed and can't remember the administrator password.  Is there anything  I can do to change the current password?
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Question by:WellingtonIS
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by:TazDevil1674
ID: 38720525
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by:WellingtonIS
ID: 38720529
I have a thumb drive so will that work?
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by:WellingtonIS
ID: 38720538
It zorin can I do that via command line?
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by:arnold
ID: 38720571
As long as you can boot the system, and as long as you can mount the partition (/) of the drive, you can navigate to the etc/shadow and modify the login.

Do you have a limited user that you can login with and then use sudo to elevate your rights?
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Author Comment

by:WellingtonIS
ID: 38721524
that's just the problem. We don't know the passwords for the limited user either.
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by:arnold
ID: 38721567
Ok, the only option is to use a liveCd or USB stick to boot the sysytem and the mount the partition that has the etc directory and edit shadow to replace the current password with a new one.
The complexity depends on how your current system partitioned/setup.
I.e. does the system have raw partitions, lvm based partition or software raid with lvm overlay.
In the case of software raid, you must have info on which disks/partitions make up which volume to avoid data corruption.
RAID 5 groups will cause the most difficulties.

When dealing with software raid, you have to use mdadm, and other tools to be in a position to identify array members.
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Author Comment

by:WellingtonIS
ID: 38721572
NO raid just a PC but I'll try thanks.
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by:arnold
ID: 38721665
if this is raw partitions or LVM only,
fdisk -l will tell you which drives are partitions how.
raw partitions you can simply do
mount /dev/sdax /mnt and look to see what is there.
if LVM partitions are referenced,
you would need to use pvscan, vgscan,lvscan
lvmdiskscan
to see what LVM partitions there are and then do the same
mount /dev/volumegroup/logicalvolume /mnt and look around there for etc.
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WellingtonIS earned 0 total points
ID: 38760771
Nothing seems to work.  Just close this we are going to redo the machine
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Author Closing Comment

by:WellingtonIS
ID: 39919952
Question needs to be close machine was totally reinstalled.
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