Sponsored Content
Full Discussion: grep group and passwd file
Top Forums UNIX for Dummies Questions & Answers grep group and passwd file Post 38462 by oombera on Wednesday 16th of July 2003 07:29:41 PM
Old 07-16-2003
I don't have a box in front of me, but maybe you could post a couple sample lines from each one? Also, what system/shell do you use?

It'd have to be something like:
Code:
awk '{print $1}' < /etc/group |
while read USR
do
 grep $USR /etc/password
done

where $1 is the field the username is in, inside the /etc/group file...

if the /etc/group file looks like:
xxx xxx jsmith xxx
then you'd use {print $3}
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

is it really not possible for me to edit the etc/group & the etc/passwd files?

From what I have read it possible to create a new group by editing the etc/group and etc/passwd in UNIX two files but a non-experienced user may face many problems such as destroying the file by mistake ot that his changes to these file does not make any difference. However, there is this... (2 Replies)
Discussion started by: whatev3r
2 Replies

2. Shell Programming and Scripting

ypcat group, ypcat passwd

When i run the following command on our server ypcat group or ypcat passwd I get list of groups and users respectively. I am not sure whether this list is only for the groups or users on the particular server on which i executed the command or all the groups and users on all the servers in... (2 Replies)
Discussion started by: pinnacle
2 Replies

3. Shell Programming and Scripting

cat /etc/passwd and grep -v on /etc/shells

Hi All, I'd like to do this cat /etc/passwd and grep -v on the /etc/shells list I'd like to find all shell that doesn't exist on the /etc/passwd. Is there an easy way without doing a egrep -v "/bin/sh|/bin/bash................"? How do I use a file /etc/shells as my list for... (4 Replies)
Discussion started by: itik
4 Replies

4. UNIX for Dummies Questions & Answers

Grep group by and count

Hi, I have several files with same filename pattern. I want to calculate count of individual files using grep/egrep. Let me be more descriptive In directory E1 i have files like ab_20091201_12:24 ab_20091201_03:24 cd_20091201_04:16 cd_20091203_08:34 ef_20091201_06:12 ef_20091201 Now i want... (3 Replies)
Discussion started by: shounakboss
3 Replies

5. Shell Programming and Scripting

Sort the file contents in each group....print the group title as well

I've this file and need to sort the data in each group File would look like this ... cat file1.txt Reason : ABC 12345-0023 32123-5400 32442-5333 Reason : DEF 42523-3453 23345-3311 Reason : HIJ 454553-0001 I would like to sort each group on the last 4 fileds and print them... (11 Replies)
Discussion started by: prash184u
11 Replies

6. UNIX for Dummies Questions & Answers

Understanding group and passwd

Hi, I am checking who belong to the dba group , and found that oracle and autosys users are part of this group cat /etc/group | grep dba dba::400:oracle,autosys I thought to found user autosys under group 400 togther with user oracle , but found it in group 1000 as you can see bellow.... (2 Replies)
Discussion started by: yoavbe
2 Replies

7. UNIX for Dummies Questions & Answers

Inconsistency between passwd and group

Hi, I have a passwd file with 3 users belonging to the the root group (gid=0), but the group file does not list these users as members of the root group? Shoud I be worried and apart from manually changing it, how can it be remediated? thx Norgaard (1 Reply)
Discussion started by: Norgaard
1 Replies

8. Shell Programming and Scripting

need a one liner to grep a group info from /etc/group and use that result to search passwd file

/etc/group tiadm::345:mk789,po312,jo343,ju454,ko453,yx879,iy345,hn453 bin::2:root,daemon sys::3:root,bin,adm adm::4:root,daemon uucp::5:root /etc/passwd mk789:x:234:1::/export/home/dummy:/bin/sh po312:x:234:1::/export/home/dummy:/bin/sh ju454:x:234:1::/export/home/dummy:/bin/sh... (6 Replies)
Discussion started by: chidori
6 Replies

9. UNIX for Dummies Questions & Answers

Conflicting GID in group and passwd files.

Hi guys, I have a question. In the passwd file, user johndoe has a GID of 100 which is the group named users in the group file. But if you check the group file, johndoe is not listed under GID 100, but under GID 33, which is the group named videos. Under what group does johndoe really belong,... (1 Reply)
Discussion started by: goldenlight1814
1 Replies

10. Shell Programming and Scripting

Grep patterns and group counts

Hi, I have a continuous log file which has the following format:- 02/Sep/2015: IP 11.151.108.166 error occurred etc 03/Sep/2015: IP 11.151.108.188 error occurred etc 03/Sep/2015: IP 11.152.178.250 error occurred etc 03/Sep/2015: IP 11.188.108.176 error occurred etc 03/Sep/2015: IP... (4 Replies)
Discussion started by: finn
4 Replies
newgrp(1)						      General Commands Manual							 newgrp(1)

NAME
newgrp - switch to a new group SYNOPSIS
[group] DESCRIPTION
The command changes your group ID without changing your user ID and replaces your current shell with a new one. If you specify group, the change is successful if group exists and either your user ID is a member of the new group, or group has a pass- word and you can supply it from the terminal. If you omit group, changes to the group specified in your entry in the password file, Whether the group is changed successfully or not, or the new group is the same as the old one or not, proceeds to replace your current shell with the one specified in the shell field of your password file entry. If that field is empty, uses the POSIX shell, (see sh- posix(1)). If you specify (hyphen) as the first argument, the new shell starts up as if you had just logged in. If you omit the new shell starts up as if you had invoked it as a subshell. You remain logged in and the current directory is unchanged, but calculations of access permissions to files are performed with respect to the new real and effective group IDs. Exported variables retain their values and are passed to the new shell. All unexported variables are deleted, but the new shell may reset them to default values. Since the current process is replaced when the new shell is started, exiting from the new shell has the same effect as exiting from the shell in which was executed. EXTERNAL INFLUENCES
International Code Set Support Characters from the 7-bit USASCII code set are supported in group names (see ascii(5)). DIAGNOSTICS
The command issues the following error messages: Your user ID does not qualify as a group member. The group name does not exist in If a password is required, it must come from a terminal. Standard input is not a terminal file, causing the new shell to fail. EXAMPLES
To change from your current group to group without executing the login routines: To change from your current group to group and execute the login routines: WARNINGS
There is no convenient way to enter a password into The use of group passwords is not recommended because, by their very nature, they encourage poor security practices. Group passwords may be eliminated in future HP-UX releases. If the specified group to has multiple inconsistent entries (i.e. the group id or/and password are different) in the group database, will consider the group id and password of the first matched group entry as the correct group id and password for the group. FILES
System group file System password file SEE ALSO
csh(1), ksh(1), login(1), sh-posix(1), group(4), passwd(4), environ(5). STANDARDS CONFORMANCE
newgrp(1)
All times are GMT -4. The time now is 05:41 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy