Sudo is a program or package for Unix or linux operating systems that allows users to run programs with the security privileges of another user. With sudo, linux system administrator is allow to give certain users (or groups of users) the ability to run some (or all) commands as root or another user while logging the commands and arguments. In this post, i will show the quick steps on how to install sudo on CentOS 5.7. This steps may working on other version such as CentOS 5.1, CentOS 5.2, CentOS 5.3, CentOS 5.4, CentOS 5.5 and CentOS 5.6.
[root@CentOS57 ~]# yum install sudo -y Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: mirror.oscc.org.my * extras: mirror.oscc.org.my * rpmforge: ftp-stud.fht-esslingen.de * updates: mirror.oscc.org.my base | 1.1 kB 00:00 extras | 2.1 kB 00:00 rpmforge | 1.1 kB 00:00 updates | 1.9 kB 00:00 Setting up Install Process Resolving Dependencies --> Running transaction check ---> Package sudo.i386 0:1.7.2p1-13.el5 set to be updated --> Finished Dependency Resolution Dependencies Resolved ==================================================================================================== Package Arch Version Repository Size ==================================================================================================== Installing: sudo i386 1.7.2p1-13.el5 base 351 k Transaction Summary ==================================================================================================== Install 1 Package(s) Upgrade 0 Package(s) Total download size: 351 k Downloading Packages: sudo-1.7.2p1-13.el5.i386.rpm | 351 kB 00:02 Running rpm_check_debug Running Transaction Test Finished Transaction Test Transaction Test Succeeded Running Transaction Installing : sudo 1/1 Installed: sudo.i386 0:1.7.2p1-13.el5 Complete!
sudo help command and options can be display using “sudo -h” command :
[root@CentOS57 ~]# sudo -h
usage: sudo -h | -K | -k | -L | -V
usage: sudo -v [-AknS] [-p prompt]
usage: sudo -l[l] [-AknS] [-g groupname|#gid] [-p prompt] [-U username] [-u username|#uid] [-g
groupname|#gid] [command]
usage: sudo [-AbEHknPS] [-r role] [-t type] [-C fd] [-g groupname|#gid] [-p prompt] [-u
username|#uid] [-g groupname|#gid] [VAR=value] [-i|-s] []
usage: sudo -e [-AknS] [-r role] [-t type] [-C fd] [-g groupname|#gid] [-p prompt] [-u
username|#uid] file ...
The visudo command is a text editor that mimics the vi editor that is used to edit the /etc/sudoers configuration file.
[root@CentOS57 ~]# visudo
or
[root@CentOS57 ~]# vi /etc/sudoers
