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Full Discussion: Vlookup not using awk
Top Forums UNIX for Beginners Questions & Answers Vlookup not using awk Post 303035938 by joonisio on Monday 10th of June 2019 05:34:11 AM
Old 06-10-2019
Vlookup not using awk

Hi I just want again to ask for help on what command to use to vlookup f1 group name in "/etc/group" matching f3 of it to "/etc/passwd" f4. I do need to display group name in the output of /etc/passwd without using awk or NR==FNR command. thank you

Code:
while
IFS=: read -r f1 f2 f3 f4 f5 f6 f7
IFS=: read -r f1 f2 f3
do
printf "%-20s %-10s %s \n" "$f1" "$f3" "$f6";
done </etc/passwd # </etc/group


Last edited by Scrutinizer; 06-10-2019 at 08:34 AM.. Reason: code tags
 

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NEWGRP(1)						    BSD General Commands Manual 						 NEWGRP(1)

NAME
newgrp -- change to a new primary group SYNOPSIS
newgrp [-l] [group] DESCRIPTION
The newgrp command changes a user to a new primary group (real and effective group ID) by starting a new shell. The user remains logged in and the current directory and file creation mask remain unchanged. The user is always given a new shell even if the primary group change fails. The newgrp command accepts the following options: -l The environment is changed to what would be expected if the user actually logged in again. This simulates a full login. The group is a group name or non-negative numeric group ID from the group database. The real and effective group IDs are set to group or the group ID associated with the group name. If group is not specified, newgrp restores the user's real and effective group IDs to the user's primary group specified in the password database. The user's supplementary group IDs are restored to the set specified for the user in the group database. If the user is not a member of the specified group, and the group requires a password, the user will be prompted for the group password. FILES
/etc/group The group database /etc/master.passwd The user database /etc/passwd A Version 7 format password file EXIT STATUS
If a new shell is started the exit status is the exit status of the shell. Otherwise the exit status will be >0. SEE ALSO
csh(1), groups(1), login(1), sh(1), su(1), umask(2), group(5), passwd(5), environ(7) STANDARDS
The newgrp command conforms to IEEE Std 1003.1-2001 (``POSIX.1''). HISTORY
A newgrp command appeared in Version 6 AT&T UNIX. A newgrp command appeared in NetBSD 5.0. BUGS
There is no convenient way to enter a password into /etc/group. The use of group passwords is strongly discouraged since they are inherently insecure. It is not possible to stop users from obtaining the encrypted password from the group database. BSD
June 6, 2007 BSD
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