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Grep userids

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# 1  
Old 11-09-2008
Grep userids
Hey, what's the best way to use grep to list all userid's on the system that do not contain the "." character (period). Also, could I edit the same command to list all the userid's on the system that are 10 or more characters in length. Thanks, I'm not that familiar with grep, but I know it can do a lot.
# 2  
Old 11-09-2008
Code:
cut -d: -f1 /etc/passwd |grep -v "\."

will give you the names without a "." in them (remove the -v to give only the names with a "." in them.
Code:
for name in $(cut -d: -f1 /etc/passwd)
do
[ ${#name} -gt 10 ] && echo $name
done

will give you the names that are greater than 10 chars long
Last edited by wempy; 11-09-2008 at 08:34 AM.. Reason: for conciseness
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