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grep userid under 100 and link to /etc/shadow

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Operating Systems Linux grep userid under 100 and link to /etc/shadow
# 1  
Old 09-23-2008
grep userid under 100 and link to /etc/shadow
Hi All,

How do I grep and link the relationship between /etc/passwd and /etc/shadow?

Thank you in advance.
# 2  
Old 09-23-2008
An example to print the maximum number of days the password is valid for users with a userid under 100:

Code:
awk -F: 'NR==FNR && $3 < 100 {a[$1];next} $1 in a {print $5}' /etc/passwd /etc/shadow

BTW you must have root permission to read the /etc/shadow file.

Regards
# 3  
Old 09-23-2008
I'd like to show the login and userid which I can't, can you please modify it.

BTW, the one showing is the 5th element on /etc/shadow (most of them are 91).


Thanks again.
# 4  
Old 09-23-2008
Quote:
Originally Posted by itik
I'd like to show the login and userid which I can't, can you please modify it.

BTW, the one showing is the 5th element on /etc/shadow (most of them are 91).


Thanks again.
Then it's unnecessary to read the shadow file:

Code:
awk -F: '$3 < 100{print "Login: "$1, "UserID: "$3}' /etc/passwd

Regards
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