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Looking for specific user ID's from the passwd file

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Top Forums Shell Programming and Scripting Looking for specific user ID's from the passwd file
# 8  
Old 08-24-2007
Or (assuming GNU grep):

Code:
printf "%.6s\n" $(egrep -o '^[[:alpha:]]{2}[0-9]{4}:' /etc/passwd)

Or with GNU sed:

Code:
sed -nr 's/^([[:alpha:]]{2}[[:digit:]]{4}):.*/\1/p' /etc/passwd

Otherwise:

Code:
sed -n 's/^\([A-Za-z]\{2\}[0-9]\{4\}\):.*/\1/p' /etc/passwd

# 9  
Old 08-29-2007
Quote:
Originally Posted by LinuxRacr
Your egrep prints out not only the userids, but the other stuff after the first ":" also. Doesn't work.
Oops Smilie Smilie

Should of been:

Code:
egrep '^[A-Za-z]{2}[0-9]{4}:' /etc/passwd | awk -F':' '{print $1}'

or

egrep '^[A-Za-z]{2}[0-9]{4}:' /etc/passwd | sed -e 's/:.*//'
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