Visit Our UNIX and Linux User Community

Top Forums Shell Programming and Scripting IF $USER is not in this list of users, then do this Post 302361986 by Casey on Wednesday 14th of October 2009 03:43:14 PM
Old 10-14-2009
$? gives you the exit status of the latest command executed. In this case if this

echo 'smitha, lucyb, johnk' | grep -q ${USER}

is successfully done, then $? will be 0, else it will be 1 (or any other value between 1 and 255). Then you use that value to check if the users was found or not.
Test Your Knowledge in Computers #917
Difficulty: Easy
Unix time is also known as Epoch time.
True or False?

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

su - user... how to find out the list of users and their passwords..

hi, to do a su - user, we need to know what are the users... so in unix 1) which file to see the list of users, passwords? (2 Replies)
Discussion started by: yls177
2 Replies

2. AIX

Script allows user to kill other users: I'd like to know HOW...

Hello list, Have a problem that's highlighting gaps in my knowledge; can you assist? We have a script that's tacked onto our trading application which allows branch managers etc. to kill off the sessions of other users at their branch. A menu option in the application spawns a shell running... (8 Replies)
Discussion started by: alexop
8 Replies

3. AIX

cloning users access with different user name

Hi! this would be my first time to post here in this forums, hope you can help me with my queries. i would like to create a different user name but have the same access rights. Example: root > rootbaby. thanks (5 Replies)
Discussion started by: HPL1706
5 Replies

4. UNIX for Dummies Questions & Answers

User Name and Password List/adding and removing users.

Hello everyone and let me start off by thanking anyone who can help with this. I work for a company that uses Unix as one of their servers. I'm not at all familar with Unix beyond logging after I restart the server:rolleyes: I'm looking for some command that will bring me up a list of current... (3 Replies)
Discussion started by: disgracedsaint
3 Replies

5. Shell Programming and Scripting

script to ignore the user from list of users

Hi, I have a situation where I want to ignore few users from list of users and print rest of user in log file. say, I want to ignore aaa, bbb, ccc, ddd .. ppp from list of 20 user (do not want to include) What is the good command or any script? Thanks in advance. (1 Reply)
Discussion started by: sumit30
1 Replies

6. UNIX for Advanced & Expert Users

list of users

Hello!Does anybody know how to solve this script: ,,write a shell script which displays a list of names of users who have created files "*. c" in the last day."? (1 Reply)
Discussion started by: theodoraa
1 Replies

7. UNIX for Dummies Questions & Answers

Not able to switch to other users using su -user from root

Hi all, I have a small problem. When I log in as root and try to switch to any other user using su -user, then it is giving an error saying permission denied. Can you help me? Thank you in advance. Sai. (1 Reply)
Discussion started by: sai2krishna
1 Replies

8. UNIX for Advanced & Expert Users

Need to find the user id of all users in UNIX

I need to find all the unix user id's of all the users in unix... is there any such command... pl help out (6 Replies)
Discussion started by: Syed Imran
6 Replies

9. UNIX for Dummies Questions & Answers

Users list

Hi i would like to know were the folder that contain file with list of all users ? And were i can learn about what kind of folder i have and wheat they have inside? question 2. when i write ls -a i see all directories and then i choose for example Documents and inside Documents i typed again... (1 Reply)
Discussion started by: iliya24
1 Replies

10. Shell Programming and Scripting

List the Manager of Users in AD - Using list- Get-ADuser

Is there any command that can used in Linux that export usernames and their manager's name from AD using bash shell script? I know this can be done using powershell but I need to use Linux for this procedure. (2 Replies)
Discussion started by: dellanicholson
2 Replies
ALTER GROUP - change role name or membership SYNOPSIS
ALTER GROUP groupname ADD USER username [, ... ] ALTER GROUP groupname DROP USER username [, ... ] ALTER GROUP groupname RENAME TO newname DESCRIPTION
ALTER GROUP changes the attributes of a user group. This is an obsolete command, though still accepted for backwards compatibility, because groups (and users too) have been superseded by the more general concept of roles. The first two variants add users to a group or remove them from a group. (Any role can play the part of either a ``user'' or a ``group'' for this purpose.) These variants are effectively equivalent to granting or revoking membership in the role named as the ``group''; so the preferred way to do this is to use GRANT [grant(7)] or REVOKE [revoke(7)]. The third variant changes the name of the group. This is exactly equivalent to renaming the role with ALTER ROLE [alter_role(7)]. PARAMETERS
groupname The name of the group (role) to modify. username Users (roles) that are to be added to or removed from the group. The users must already exist; ALTER GROUP does not create or drop users. newname The new name of the group. EXAMPLES
Add users to a group: ALTER GROUP staff ADD USER karl, john; Remove a user from a group: ALTER GROUP workers DROP USER beth; COMPATIBILITY
There is no ALTER GROUP statement in the SQL standard. SEE ALSO
GRANT [grant(7)], REVOKE [revoke(7)], ALTER ROLE [alter_role(7)] SQL - Language Statements 2010-05-14 ALTER GROUP(7)

Featured Tech Videos

All times are GMT -4. The time now is 03:48 PM.
Unix & Linux Forums Content Copyright 1993-2021. All Rights Reserved.
Privacy Policy