# groups <username>
To delete a member from the wheel group:
1. Edit the file /etc/group.
2. Remove the username from the line with wheel::XX:<user1>,<user2>,<user3>.
Sudo command
Using the sudo (superuser do) command, a user can execute a command using the privileges of
another user (often root), as specified in the /etc/sudoers file. The user is authenticated using his
own password, not the root password. The /etc/sudoers file logs all commands and arguments.
Syntax:
sudo <command>
Configuring sudo
A system administrator configures the /etc/sudoers file to give groups or users access to some or
all commands not authorized with their normal account. An administrator should log into the
console server as a root user and edit the /etc/sudoers file by using the /usr/sbin/visudo
command to configure sudo.
The sudoers file is composed of aliases and user specifications. When multiple entries match for
a user, they are applied in order. Where there are conflicting values, the last match is used.
Since the sudoers file is parsed in a single pass, order is important. You should structure sudoers
so that the Host_Alias, User_Alias, and Cmnd_Alias specifications come first, followed by any
Default_Entry lines, and finally the Runas_Alias and user specifications.
An example of an /etc/sudoers file:
#User alias specification
User_Alias FULLTIMERS = millert, mikef, dowdy
User_Alias PARTTIMERS = bostley, jwfox, crawl
#Cmnd alias specification
Cmnd_Alias KILL = /bin/kill
Cmnd_Alias SHUTDOWN = /sbin/shutdown
Cmnd_Alias REBOOT = /sbin/reboot
Cmnd_Alias SU = /bin su
FULLTIMERS ALL = KILL, SHUTDOWN, REBOOT, SU
PARTTIMERS ALL = SHUTDOWN, REBOOT
60 Cyclades™ ACS6000 Advanced Console Server Command Reference Guide
