Re: Modifying username

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On 6/14/20 4:41 PM, Richard wrote:


Date: Sunday, June 14, 2020 17:26:42 -0400
From: Jay Hart <jhart@xxxxxxxxx>

On 6/14/20 1:39 PM, Jay Hart wrote:
You may need to modify /etc/shadow for consistency.

I don't know what to do here.  Need some guidance please.


Run "vipw -s" and make the same change to that file's record for
ABCLast.


In /etc/passwd the directory was shown in plain text.  So I just
moved over in the line and changed /home/ABCLast to /home/ALast.
Saved file, and exited.

I don't see a directory name in /etc/shadow using 'vipw -s'


The /etc/shadow file doesn't have the user directory information,
rather the username and the password (and some other bits - man
shadow for the details). With the /etc/passwd and /etc/shadow out of
sync - having different versions of the username - I suspect that the
user can't log in. You should also fix the shadow group file
(gshadow). Look at the man page for vipw for the command for doing
that.


Whenever you are attempting to edit UNIX user related files manually, keep in mind that information in the following files should be changed (not necessarily in all, depending on what you change):

/etc/passwd
/etc/shadow
/etc/group
/etc/gshadow

There are also "previous versions" of each of these files which have the same names appended by hyphen ("minus").

Also, keep in mind that permissions for all of these files matter.

I hope, this helps.

Valeri


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++++++++++++++++++++++++++++++++++++++++
Valeri Galtsev
Sr System Administrator
Department of Astronomy and Astrophysics
Kavli Institute for Cosmological Physics
University of Chicago
Phone: 773-702-4247
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