12-24-2013
Script to add new users to a group on multiple servers using SSH
Hi Experts,
I am new to scripting. We have around 400 Linux servers in our environment. I want to add a new user to a perticular group on all the servers using SSH.
Requirements:
1) Need to take the server names from a text file.
2) Login into each server and check whether perticular group is available or not. If yes, check whether the user is already added to that group.
3) If the user is not existing in that group, add the user to it.
Can somebody help me with a simple script to do this ?
Thank you in advance.
Regards,
Satya.
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi all, working on script to create a user acct on all our servers.
for i in `cat $host_file`; do
ssh $i /usr/bin/sudo /usr/bin/mkuser id='bpadm' gecos='NetBackup Admin' 2>&1 >> $log
done
error i get is: 3004-692 Error changing "id" to "bpadm" : Value is invalid.
I have tried this in... (1 Reply)
Discussion started by: dnidiffer
1 Replies
2. Shell Programming and Scripting
does a command exist to add users to more than one group?
i think the usermod command can do this but i'm not really sure. past ways of me doing this has always been to just hack the /etc/group file and put the user in whatever group i need him to be in. however, vi..ing files like /etc/groups... (2 Replies)
Discussion started by: Terrible
2 Replies
3. Shell Programming and Scripting
Hi,
Can any one tell me is it possible to setup private key public key pairing(SSH ) for a group of users , instead of setting it up for individual users ?
Eg:
Say i have 3 users A,B and C and i want the users to connect to SERVER1. instead of generating public private keys for each user , is... (3 Replies)
Discussion started by: deepusunil
3 Replies
4. UNIX for Dummies Questions & Answers
Hi All,
Okay, I need help.
I need to ssh in to multiple linux servers execute certain commands and get them to email and print on the screen when the script is being executed.
So below is my script. Its not working :-(.
#!/bin/bash
#linux/UNIX box with ssh key based login... (7 Replies)
Discussion started by: xytiz
7 Replies
5. Shell Programming and Scripting
Requirement:
Run a shell script with below inputs
file name
checksum
path
the script should go to multiple servers (around 35) and verify the input cksum and if there is a mismatch display a simple message to the user that cksum verification failed.
host details, user id /... (1 Reply)
Discussion started by: amicableperson
1 Replies
6. Shell Programming and Scripting
Hello,
I have access to several linux servers (mostly centos based) located in a DC in another country.
from day to day I need to login to each of them to do some work (they dont have gui/window manager installed, I work only from console), or even to just do a check like df -h for disc usage.... (3 Replies)
Discussion started by: MaRiOsGR
3 Replies
7. Shell Programming and Scripting
Hi Y'all,
I need help adding 30 users to 50 servers.
Is there a way to automate this?
I'm using this command:
sudo mkuser pgrp=srvadm gecos=Spears, Brittney auditclasses=ALL sugroups=system,security user01
But I'm doing it per user, per server...HOW CAN I MAKE THIS EASIER?... (7 Replies)
Discussion started by: jennie28n
7 Replies
8. Shell Programming and Scripting
Hi Team,
Hope you are doing good.I am new to scripting.I have a requirement of deleting around 10 users in 100 servers.It is very time consuming by logging into each servers and delete the user.Here I have redhat 6 ,Suse linux 10&11 environment servers.
In one set of servers I have... (5 Replies)
Discussion started by: muraliinfy04
5 Replies
9. Shell Programming and Scripting
Hi
I have an ssh 'for' loop script to login and put a key on multiple servers. I need to append a file on each server but the command which works ok from the prompt does not work via the script. I have
cat filename | ssh user@servername "cat >>append.file.name"
I have tried to 'spawn' this in... (0 Replies)
Discussion started by: Grueben
0 Replies
10. UNIX for Beginners Questions & Answers
Hi folks.
I'm pretty new to unix, while I'm learning a lot I'm finding bash scripting quite confusing. Im sure it's not really, my head just hasn't clicked with it.
Anyway, I need a script to loop the ip addresses stored in a file and run a "pgrep <process>" and return the pid or some... (2 Replies)
Discussion started by: MuntyScrunt
2 Replies
group(4) Kernel Interfaces Manual group(4)
NAME
group - Group file
DESCRIPTION
The /etc/group database contains the following information for each group: Group name Encrypted password Numerical group ID A comma-sepa-
rated list of all users allowed in the group
Note: Do not put any spaces between a comma and a username; otherwise, the username following the comma will not be made a part of the
desired group.
The /etc/group file is an ASCII file, with the fields separated by colons. Each group is separated from the next by a new line. If the
password field is null, no password is demanded.
Because of the encrypted passwords, it can and does have general read permission and can be used, for example, to map numerical group IDs
to names.
Note that commands or scripts used for adding users to groups are subject to the 225 character limit on line lengths. However, you can
split lines as appropriate.
RESTRICTIONS
Increasing the number of groups that a user is in beyond 16 can affect services that use ONC RPC. Tru64 UNIX ONC RPC supports up to 32
groups for compatibility with ULTRIX Version 4.2 and higher. Other vendors may support only 16 groups. ULTRIX versions before 4.2 support
up to 8 groups. Users who increase their group membership beyond 8 or 16 groups will not be able to NFS mount file systems from servers
that only support 8 or 16 groups over NFS. In addition, if root group membership is increased beyond 8 or 16, the NIS service will not work
in a mixed NIS server environment where the servers support only 8 or 16 groups. The addgroup command limits the length of a group name to
eight characters or less.
FILES
/etc/group
RELATED INFORMATION
Commands: addgroup(8), groupadd(8), adduser(8), groups(1), passwd(1)
Functions: setgroups(2)
Routines: initgroups(3)
Files: passwd(4)
delim off
group(4)