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14Switched Rack PDU User Guide
Command Line Interface
About the Command Line Interface
You can use the command line interface to view the status of and configure and manage the Rack PDU
(and any connected Rack PDUs if using the Network Port Sharing Feature). In addition, the command
line interface enables you to create scripts for automated operation. An Administrator has full access to
the command line interface, a Device user and Outlet User have limited access, and a Read-Only user is
completely restricted.
You can configure all parameters of a Rack PDU (including those for which there are not specific CLI
commands) by using the CLI to transfer an INI file to the Rack PDU. The CLI uses XMODEM to
perform the transfer. However, you cannot read the current INI file through XMODEM.
Log on to the Command Line Interface
To access the command line interface, you can use either a local (serial) connection or a remote (Telnet
or SSH) connection with a computer on the same network as the Rack PDU.
Remote access to the command line interface
You can access the command line interface through Telnet or SSH. Telnet is enabled by default. Enabling
SSH disables Telnet.
To enable or disable these access methods, use the Web interface. On the Administration tab, select
Network on the top menu bar, and then the access option under Console on the left navigation menu.
Telnet for basic access. Telnet provides the basic security of authentication byuser name and
password, but not the high security benifits of encryption.
To use Telnet to access the command line interface:
1. From a computer that has access to the network on which the Rack PDU is installed, at a
command prompt, type
telnet and the IP address for the Rack PDU (for example, telnet
139.225.6.133, when the Rack PDU uses the default Telnet port of 23), and press ENTER.
If the Rack PDU uses a non-default port number (from 5000 to 32768), you must include a colon
or a space, depending on your Telnet cliet, between the IP address (or DNS name) and the port
number. (These are commands for general usage. Some clients do not allow you to specify the
port as an argument and some types of Linux might want extra commands).
2. Enter the user name and password (by default, apc and apc for an Administrator, or device and
apc for a Device User).
If you cannot remember your user name or password, see “Recovering from a Lost Password” on
page 8.
SSH for high-security access. If you use the high security of SSL for the Web interface, use SSH for
access to the command line interface. SSH encrypts user names, passwords, and transmitted data. The
interface, user accounts, and user access rights are the same whether you access the command line
interface through SSH or Telnet, but to use SSH, you must first configure SSH and have an SSH client
program installed on your computer.