Linux

How to Enable Sudo for a User 

1
2
[root]# usermod -aG wheel UserName
[root]# visudo

visudo command actually opens /etc/sudoers to edit.

Uncomment line of %wheel ALL=(ALL) ALL will ask for password when sudo.
Uncomment line of %wheel ALL=(ALL) NOPASSWD: ALL won’t ask for password when sudo.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
## Allow root to run any commands anywhere
root    ALL=(ALL)   ALL

## Allows members of the 'sys' group to run networking, software,
## service management apps and more.
# %sys ALL = NETWORKING, SOFTWARE, SERVICES, STORAGE, DELEGATING, PROCESSES, LOCATE, DRIVERS

## Allows people in group wheel to run all commands
# %wheel    ALL=(ALL)   ALL

## Same thing without a password
%wheel  ALL=(ALL)   NOPASSWD: ALL

## Allows members of the users group to mount and unmount the
## cdrom as root
# %users  ALL=/sbin/mount /mnt/cdrom, /sbin/umount /mnt/cdrom

## Allows members of the users group to shutdown this system
# %users  localhost=/sbin/shutdown -h now

## Read drop-in files from /etc/sudoers.d (the # here does not mean a comment)
#includedir /etc/sudoers.d