You say you’re using “su -”. The sudoers file only works for the ’sudo’ command. Sudo and su are two entirely different things.

Eventually I am writing some shell script to support some RAID testing in my system. The script will require the system to login automatically in the normal user mode and then reboot again in one minute. Without the disable root password feature, the script cannot function well. I manage to run the script well in Ubuntu Server 9.04 but somehow I still feel headache to figure out the solution to disable the root password.

I really appreciate that your efforts in solving my problem. Here i attach the full content of the sudoers file:

## Sudoers allows particular users to run various commands as
## the root user, without needing the root password.
##
## Examples are provided at the bottom of the file for collections
## of related commands, which can then be delegated out to particular
## users or groups.
##
## This file must be edited with the ‘visudo’ command.

## Host Aliases
## Groups of machines. You may prefer to use hostnames (perhap using
## wildcards for entire domains) or IP addresses instead.
# Host_Alias FILESERVERS = fs1, fs2
# Host_Alias MAILSERVERS = smtp, smtp2

## User Aliases
## These aren’t often necessary, as you can use regular groups
## (ie, from files, LDAP, NIS, etc) in this file – just use %groupname
## rather than USERALIAS
# User_Alias ADMINS = jsmith, mikem

## Command Aliases
## These are groups of related commands…

## Networking
Cmnd_Alias NETWORKING = /sbin/route, /sbin/ifconfig, /bin/ping, /sbin/dhclient, /usr/bin/net, /sbin/iptables, /usr/bin/rfcomm, /usr/bin/wvdial, /sbin/iwconfig, /sbin/mii-tool

## Installation and management of software
Cmnd_Alias SOFTWARE = /bin/rpm, /usr/bin/up2date, /usr/bin/yum

## Services
Cmnd_Alias SERVICES = /sbin/service, /sbin/chkconfig

## Updating the locate database
Cmnd_Alias LOCATE = /usr/bin/updatedb

## Storage
Cmnd_Alias STORAGE = /sbin/fdisk, /sbin/sfdisk, /sbin/parted, /sbin/partprobe, /bin/mount, /bin/umount

## Delegating permissions
Cmnd_Alias DELEGATING = /usr/sbin/visudo, /bin/chown, /bin/chmod, /bin/chgrp

## Processes
Cmnd_Alias PROCESSES = /bin/nice, /bin/kill, /usr/bin/kill, /usr/bin/killall

## Drivers
Cmnd_Alias DRIVERS = /sbin/modprobe

# Defaults specification

#
# Disable “ssh hostname sudo “, because it will show the password in clear.
# You have to run “ssh -t hostname sudo “.
#
Defaults requiretty

Defaults env_reset
Defaults env_keep = “COLORS DISPLAY HOSTNAME HISTSIZE INPUTRC KDEDIR \
LS_COLORS MAIL PS1 PS2 QTDIR USERNAME \
LANG LC_ADDRESS LC_CTYPE LC_COLLATE LC_IDENTIFICATION \
LC_MEASUREMENT LC_MESSAGES LC_MONETARY LC_NAME LC_NUMERIC \
LC_PAPER LC_TELEPHONE LC_TIME LC_ALL LANGUAGE LINGUAS \
_XKB_CHARSET XAUTHORITY”

## Next comes the main part: which users can run what software on
## which machines (the sudoers file can be shared between multiple
## systems).
## Syntax:
##
## user MACHINE=COMMANDS
##
## The COMMANDS section may have other options added to it.
##
## 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
ftc ALL=NOPASSWD: ALL

I already included user ALL = NOPASSWD: ALL in /etc/sudoers but it is not working. I still need to key in the password when su – is used.

Note that i use gedit to open the sudoers list and save it before the system goes to reboot.

I am using RED HAT ENTERPRISE 5.1 64bit. Please don’t mind to guide me because i am a Linux newbie.

Be sure there is not one rule above this one that superseeds it (group based or one for the user), as the order of the rules is important. hth.

user_name ALL=(ALL) NOPASSWD:ALL
user_name ALL = NOPASSWD: ALL

Both commands are not working. Can i know how to solve it?

file1=/etc/nodename
newhost=whatever

sudo echo $newhost > $file1

When I run my script, I always get /etc/nodename permission denied or cannot create.

How can I run this command as a non-root user.

Any help is appreciated.

Raj

The tee example as non-root should be:

echo “webmaster@example.com joe” | sudo tee -a /etc/mail/virtusertable