Define an alias using the alias command, as in the example below. To clear the alias, use the unalias command. In general, you should not define aliases that are the same as actual Unix commands, especially when the alias may require an interactive response, since problems may result when they are used in certain applications. Now when you use rm in a shell script, the script will hang, waiting for a response. You can execute compiled programs and shell scripts by entering the name of the program or script at the prompt.
Successful execution depends on the following factors.
The program or script must be located in a directory that is specified in your PATH variable, or you must include the path of the program. This command causes the C-shell to read commands from a file. The C-shell has a facility that controls the execution of programs and scripts. The C-shell command, jobs lists the job number, the status of the job, and the command that generated them. You can execute a program in background mode in one of two ways.