How to find out what group a given user has?
LinuxUnixCommand LineSysadminLinux Problem Overview
In Unix/Linux, how do you find out what group a given user is in via command line?
Linux Solutions
Solution 1 - Linux
groups
or
groups user
Solution 2 - Linux
This one shows the user's uid as well as all the groups (with their gids) they belong to
id userid
Solution 3 - Linux
On Linux/OS X/Unix to display the groups to which you (or the optionally specified user) belong, use:
id -Gn [user]
which is equivalent to groups [user] utility which has been obsoleted on Unix.
On OS X/Unix, the command id -p [user] is suggested for normal interactive.
Explanation on the parameters:
> -G, --groups - print all group IDs
>
> -n, --name - print a name instead of a number, for -ugG
>
> -p - Make the output human-readable.
Solution 4 - Linux
or just study /etc/groups (ok this does probably not work if it uses pam with ldap)
Solution 5 - Linux
Below is the script which is integrated into ansible and generating dashboard in CSV format.
sh collection.sh
#!/bin/bash
HOSTNAME=`hostname -s`
for i in `cat /etc/passwd| grep -vE "nologin|shutd|hal|sync|root|false"|awk -F':' '{print$1}' | sed 's/[[:space:]]/,/g'`; do groups $i; done|sed s/\:/\,/g|tr -d ' '|sed -e "s/^/$HOSTNAME,/"> /tmp/"$HOSTNAME"_inventory.txt
sudo cat /etc/sudoers| grep -v "^#"|awk '{print $1}'|grep -v Defaults|sed '/^$/d;s/[[:blank:]]//g'>/tmp/"$HOSTNAME"_sudo.txt
paste -d , /tmp/"$HOSTNAME"_inventory.txt /tmp/"$HOSTNAME"_sudo.txt|sed 's/,[[:blank:]]*$//g' >/tmp/"$HOSTNAME"_inventory_users.txt
My output stored in below text files.
cat /tmp/ANSIBLENODE_sudo.txt
cat /tmp/ANSIBLENODE_inventory.txt
cat /tmp/ANSIBLENODE_inventory_users.txt