Avocent ACS 6000 Configuring sudo

# groups <username>

To deletea 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 execut e a command using the privileges of

another user (often root), as speci fied in the /e tc/sudoers file. The user is au thenticated u sing his

own password, not t he root password. The /et c/sudoers file logs all commands and arguments.

Syntax:

sudo <command>

Configuring sudo

A system administrator configures the /etc/sudoers file to giv eg roups oru sersaccess to some or

all commands not a uthorized with their normal account . An administrator shoul d log into the

console server as a root user and edit the /et c/sudoers file by using the /usr/sbin/visudo

command to configure sudo.

The sudoers file is composed of ali ases and user specifications. When multiple entries match for

a user, they are applied in order. Where there are conflict ing values, the last match is used.

Since the sudoers file is parsed i n a single pass, order is important .Y ou should structure sud oers

so that the Ho st_Alias, User_Alias, and Cmnd_Alias specificatio ns come first, followed by a ny

Default_Entry lines, and finally th e 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™ ACS6000 Advan ced Console Server Command Reference Guide

Contents

Main Page Page Symbols Used TA B L E O F C O N T E N T S Page Page Page Introd uctio n, Navi gatio n and Comma nds Access Options and How to Log Into th e CLI 2Cycl ades ACS6000 Advanced Conso le ServerCommand Reference Guid e The CLI utility can be accessed in the foll owing ways: Configuration Tas ks Performed W ith the CLI CLINavigation Autocompleti on Parameters Command Line Syn tax Page Page CLI Com mand S et Commands Used for the CLI help add delete cd pwd connect sniff share disconnect exit/quit ftp scp set commit revert ls show list_configuration cycle, on, off, lock and unlock passwd opiepasswd wiz Special Multi -session Commands list_shared_session kill_shared_session sendmsg show_databuf and show_appliance_databuf cleandbuf and clean_appliance_databuf CLI Equivalent Ac tions to Web Manag er Checkbox Selection Page Port Ac cess a nd Config uratio n Exam ples View Inform ation About the Cons ole Server and Connected Devices Chapter 3: Port Access a nd Configuration Examples 23 Connect to a De vice Console Connected to a Serial Port Accessing Serial Ports using t s_menu Manage Power f or a Device Connected to an Out let on a PDU Port Configuratio n Examples Page 2. Enter show to view th e configuration o f port 3. Chapter 3: Port Access a nd Configuration Examples 27 Page CLI Ove rview for Adm inistra tors System System/Secur ity 30 Cyclades ACS6000 A dvanced Console Server Command Reference Guide Enter cd security t o navigate to the security level. --:- / cli-> cd system/security System/Date and Time Chapter 4: CLI Overvi ew for Administrators 31 Enter cd system/date_and_time to navigate t o the date_and_time level. --:- / cli-> cd system/date_and_time System/Help and Language System/General System/Boot Configuration System/Information System/Usage Network 34 Cyclades ACS6000 A dvanced Console Server Command Reference Guide 1. Enter cd network to navigate to t he Network level 2. Enter ls to view th e list of availab le options. Network/Settings Network/IPv4 and IPv6 Network/Devices Network/Hosts Page Network/Firewall 38 Cyclades ACS6000 A dvanced Console Server Command Reference Guide Enter cd network/firewall to navig ate to the firewall level. Network/IPSec(VPN) Enter cd network/ipsec(vpn) to navi gate to the ipsec(vpn) level. Network/SNM P Wiz command Ports 40 Cyclades ACS6000 A dvanced Console Server Command Reference Guide Enter cd ports to nav igate to the Ports level. Chapter 4: CLI Overvi ew for Administrators 41 Example of how to set a list of serial p orts 2,5 and 6 w ith the CAS Profile and enable the status: 42 Cyclades ACS6000 A dvanced Console Server Command Reference Guide Auxiliary ports 44 Cyclades ACS6000 A dvanced Console Server Command Reference Guide Pluggable Devices Enter cd pluggable_devices to navi gate to the pluggable_d evices level. Authentication Chapter 4: CLI Overvi ew for Administrators 45 Enter cd authentication to navigat et o the authentication lev el. --:- / cli-> cd authentication Users Syslog Events_and_Logs Chapter 4: CLI Overvi ew for Administrators 47 Enter cd events_and_logs to navig ate to the events_and_log sl evel. --:- / cli-> cd events_and_logs Power Manage ment 48 Cyclades ACS6000 A dvanced Console Server Command Reference Guide The Power Management O ptions are described i n the table below. --:- / cli-> cd power_management/pdus 2. Type rename and press Tab Tab t o expand the parameters. Active Sessions I nformation Page Appendix A: Enablin g Firmware Upgra des When the Boot Image is not in Flash AP P E N D I C E S Page Appendix B: Mig ration CLI 54 Cyclades ACS6000 Advan ced Console Server Command Reference Guide Appendices 55 56 Cyclades ACS6000 Advan ced Console Server Command Reference Guide Appendices 57 Page Appendix C: Su and Sudo Comm ands Configuring sudo Page Page Appendix D: Technic al Support