Merge /etc/passwd between two servers removing sys accounts

[Romanek]

Hello All,

I have two rp3440 running 11.11 in a clustered environment. I'm look to merge the two /etc/passwd files. The only issue is that I need to remove all system accounts (i.e. root, bin, sys,) So that I don’t have duplicate accounts. The way I have the two server setup is that so all users on serverA UID falls between 1000 – 2999 and all users on serverB UID’s fall between 3000 – 4999. I would like to just remove all entries in /etc/passwd with a UID lower that 1000 on serverA. I would also like to script this process. I was looking I was looking at doing a sort on the file first but kind of lost after that. Any help is much appreciated.

-Paul

[A. Clay Stephenson]

This should get you started:

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#!/usr/bin/sh


INFILE=/etc/passwd

awk -F ':' '{ if (($3 + 0) >= 101) {print $0}}' ${INFILE}

This will read /etc/passwd and output on stdout all lines where UID (field 3) is >= 101 -- ie, it will exclude all of the system accounts. The ($3 + 0) is intentional if seemingly nonsensical because it forces the evaluation into a numeric rather than a string context.

[James R. Ferguson]

Hi Paul:

As far as culling accounts you can simply do something like:

# awk -F: '$3>=1000 && $3<= 2999' /etc/passwd > /tmp/passwd.serverA

The resulting file could be concatenated with the file from ServerB assuming that there are no duplicate login names.

Regards!

...JRF...