The a option requests that all files be listed and the l option requests a full description of each file. An example of a command which requires arguments is the cp command, which can be used with or without a string of options. Editing the Command Line Special characters can be used to edit the current command line before pressing the return key. Control u Delete the line from the cursor to the beginning of the line. Control w Delete the word preceding the cursor.
Control c Cancel the command.
You can change your password during any session with the chpw command. After some basic rules for selecting a secure password are displayed, you will be prompted for your old password. A message will be displayed to indicate the job number in brackets and process number. Another message is displayed when execution ends. In general, a job that writes to the screen or one that requires user input should not be run in the background.