Apple Xserve Up Mac OS X Server Specifications download pdf (Page 36)

36 Chapter 2 Connecting to Remote Computers

5 To send a command to the remote computer, enter the command.

6 To close a remote connection, enter logout.

You can authenticate and send a command using a single line by appending the

command to execute to the basic ssh tool. For example, to delete a file you could use:

$ ssh -l anne server1.example.com rm /Users/anne/Documents/report

$ ssh -l [email protected] "rm /Users/anne/Documents/report"

You’re prompted for the user’s password.

Using Telnet

Use the telnet tool to create a Telnet connection to a remote computer.

Because telnet isn’t as secure as SSH, Telnet access is disabled by default.

To enable Telnet access:

$ sudo service telnet start

To disable Telnet access:

$ sudo service telnet stop

You are strongly advised not to enable Telnet. When you log in using Telnet, your

passed over the Internet in clear text.

Any person on the network running tcpdump, ethereal, or similar applications can sniff

the network and take possession of your user name and password. If you run

something as root during your Telnet session, your root user account is also

compromised.

To access a remote computer using telnet:

$ telnet -l

username server

Replace username with the name of an administrator user on the remote computer.

Replace server with the name or IP address of the remote computer. For example:

$ telnet -l anne 10.0.1.2

After being connected, the remote computer prompts for a login name and password.

Depending on the type of computer you are accessing, you may see a message of the

form:

TERM = (vt100)

Press Enter to accept this default setting.

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Apple Xserve Up Mac OS X Server Specifications Page 36