Sudo

Install sudo:

#apt-get install sudo

Edit sudoers file:

EDITOR=vim visudo

Add lines

User_Alias ADMINS=user, %Domain\ Admins

ADMINS ALL=(ALL:ALL) NOPASSWD:ALL

Example Sudo file:

# This file MUST be edited with the 'visudo' command as root.

# Please consider adding local content in /etc/sudoers.d/ instead of

# directly modifying this file.

# See the man page for details on how to write a sudoers file.

Defaults env_reset

Defaults mail_badpass

Defaults secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"

Defaults requiretty

Defaults use_pty

Defaults lecture="never"

Defaults badpass_message="Wrong Pass"

Defaults passwd_tries=3

Defaults passwd_timeout=5

# Host alias specification

# User alias specification

User_Alias ADMINS=user, $Domain\ Admins

# Cmnd alias specification

# User privilege specification

root ALL=(ALL:ALL) ALL

ADMINS ALL=(ALL:ALL) NOPASSWD:ALL

#ADMINS All=(ALL:ALL) ALL

#User2 ALL=(ALL:ALL) /etc/shutdown

# Allow members of group sudo to execute any command

#%sudo ALL=(ALL:ALL) ALL

# See sudoers(5) for more information on "#include" directives:

#includedir /etc/sudoers.d

Verbose Sudoers example:

# Sample /etc/sudoers file.

# This file MUST be edited with the 'visudo' command as root.

# See the sudoers man page for the details on how to write a sudoers file.

# User alias specification

User_Alias FULLTIMERS = millert, mikef, dowdy

User_Alias PARTTIMERS = bostley, jwfox, crawl

User_Alias WEBMASTERS = will, wendy, wim

# Runas alias specification

Runas_Alias OP = root, operator

Runas_Alias DB = oracle, sybase

# Host alias specification

Host_Alias SPARC = bigtime, eclipse, moet, anchor:

SGI = grolsch, dandelion, black:\

ALPHA = widget, thalamus, foobar:\

HPPA = boa, nag, python

Host_Alias CUNETS = 128.138.0.0/255.255.0.0

Host_Alias CSNETS = 128.138.243.0, 128.138.204.0/24, 128.138.242.0

Host_Alias SERVERS = master, mail, www, ns

Host_Alias CDROM = orion, perseus, hercules

# Cmnd alias specification

Cmnd_Alias DUMPS = /usr/sbin/dump, /usr/sbin/rdump, /usr/sbin/restore, \

/usr/sbin/rrestore, /usr/bin/mt

Cmnd_Alias KILL = /usr/bin/kill

Cmnd_Alias PRINTING = /usr/sbin/lpc, /usr/bin/lprm

Cmnd_Alias SHUTDOWN = /usr/sbin/shutdown

Cmnd_Alias HALT = /usr/sbin/halt

Cmnd_Alias REBOOT = /usr/sbin/reboot

Cmnd_Alias SHELLS = /sbin/sh, /usr/bin/sh, /usr/bin/csh, /usr/bin/ksh, \

/usr/local/bin/tcsh, /usr/bin/rsh, /usr/local/bin/zsh

Cmnd_Alias SU = /usr/bin/su

Cmnd_Alias VIPW = /usr/sbin/vipw, /usr/bin/passwd, /usr/bin/chsh, \

/usr/bin/chfn

# Override built-in defaults

Defaults syslog=auth

Defaults>root !set_logname

Defaults:FULLTIMERS !lecture

Defaults:millert !authenticate

Defaults@SERVERS log_year, logfile=/var/log/sudo.log

# User specification

# root and users in group wheel can run anything on any machine as any user

root ALL = (ALL) ALL

%wheel ALL = (ALL) ALL

# full time sysadmins can run anything on any machine without a password

FULLTIMERS ALL = NOPASSWD: ALL

# part time sysadmins may run anything but need a password

PARTTIMERS ALL = ALL

# jack may run anything on machines in CSNETS

jack CSNETS = ALL

# lisa may run any command on any host in CUNETS (a class B network)

lisa CUNETS = ALL

# operator may run maintenance commands and anything in /usr/oper/bin/

operator ALL = DUMPS, KILL, SHUTDOWN, HALT, REBOOT, PRINTING,\

sudoedit /etc/printcap, /usr/oper/bin/

# joe may su only to operator

joe ALL = /usr/bin/su operator

# pete may change passwords for anyone but root on the hp snakes

pete HPPA = /usr/bin/passwd [A-z]*, !/usr/bin/passwd root

# bob may run anything on the sparc and sgi machines as any user

# listed in the Runas_Alias "OP" (ie: root and operator)

bob SPARC = (OP) ALL : SGI = (OP) ALL

# jim may run anything on machines in the biglab netgroup

jim +biglab = ALL

# users in the secretaries netgroup need to help manage the printers

# as well as add and remove users

+secretaries ALL = PRINTING, /usr/bin/adduser, /usr/bin/rmuser

# fred can run commands as oracle or sybase without a password

fred ALL = (DB) NOPASSWD: ALL

# on the alphas, john may su to anyone but root and flags are not allowed

john ALPHA = /usr/bin/su [!-]*, !/usr/bin/su *root*

# jen can run anything on all machines except the ones

# in the "SERVERS" Host_Alias

jen ALL, !SERVERS = ALL

# jill can run any commands in the directory /usr/bin/, except for

# those in the SU and SHELLS aliases.

jill SERVERS = /usr/bin/, !SU, !SHELLS

# steve can run any command in the directory /usr/local/op_commands/

# as user operator.

steve CSNETS = (operator) /usr/local/op_commands/

# matt needs to be able to kill things on his workstation when

# they get hung.

matt valkyrie = KILL

# users in the WEBMASTERS User_Alias (will, wendy, and wim)

# may run any command as user www (which owns the web pages)

# or simply su to www.

WEBMASTERS www = (www) ALL, (root) /usr/bin/su www

# anyone can mount/unmount a cd-rom on the machines in the CDROM alias

ALL CDROM = NOPASSWD: /sbin/umount /CDROM,\

/sbin/mount -o nosuid\,nodev /dev/cd0a /CDROM