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10 rsh: Remote shell

rsh executes command on host and copies its standard input to the remote command, the standard output of the remote command to its standard output, and the standard error of the remote command to its standard error. Interrupt, quit and terminate signals are propagated to the remote command; rsh normally terminates when the remote command does.

When using the rsh command, you can create a link to your path using a host name as the link name. For example:

     # ln -s /usr/bin/rsh hostname
     # hostname ls

hostname will be passed to rsh as the default host.

rsh allows access to the remote host without the use of a passwd. For details, See rcmd.

10.1 Invoking

The options are as follows :

-K
--kerberos
Turns off all Kerberos authentication.
-d
--debug
Turns on socket debugging used for communication with the remote host.
-k realm
--realm=realm
The option requests rsh to obtain tickets for the remote host in realm realm instead of the remote host's realm.
-x
--encrypt
Turns on DES encryption for all data passed via the rsh session. This may impact response time and CPU utilization, but provides increased security.
-l
--user
By default, the remote username is the same as the local username. The -l option or the ‘username@host’ format allow the remote name to be specified. Kerberos authentication is used, and authorization is determined as in rlogin (see rlogin invocation).

If no command is specified, you will be logged in on the remote host using rlogin.

Shell metacharacters which are not quoted are interpreted on the local machine, while quoted metacharacters are interpreted on the remote machine. For example:

     rsh otherhost cat remotefile >> localfile
     rsh otherhost cat remotefile ">> "localfile

The first command appends the remote file file remotefile to the local file localfile, while the later command appends remotefile to other_remotefile.