Linux - Manually and automatically adding system users

Please view this link for an indepth guide on how to add system users to /etc/passwd
http://floppix.ccai.com/adduser.html

Please Note

[root@server seantest]# passwd seantest
Changing password for user seantest.
passwd: Authentication token manipulation error

If u are running shadowed passwords there might be no entry for this user.


1. Make a backup of /etc/shadow

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1. cp /etc/shadow /etc/shadow.backup

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2. Delete /etc/shadow

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1. rm /etc/shadow

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3. Convert /etc/passwd using password convert

Code Snippet

1. pwconv

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And the same for groups...

1. Make a backup of /etc/gshadow

Code Snippet

1. cp /etc/gshadow /etc/gshadow.backup

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2. Delete /etc/gshadow

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1. rm /etc/gshadow

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3. Convert /etc/group using group convert

Code Snippet

1. grpconv

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