Appendix E. Linux Command Quick Reference
The following list describes some of the most useful and popular Linux commands. Consult the man page for each command to learn about additional arguments and details of operation.
Creates a new userid, prompting for necessary information (requires
Searches the manual pages for occurrences of the specified keyword and prints short descriptions from the beginning of matching manual pages.
Executes commands entered via
stdin(or, by using the alternative form, the specified file) at the specified time. The time can be specified in a variety of ways; for example, in hour and minute format
mmor in hour, minute, month, day, and year format
Prints descriptions of jobs pending via the at command.
Cancels execution of a job scheduled via the at command. Use the atq command to discover the identities of scheduled jobs.
Places the current job (or, by using the alternative form, the specified jobs) in the background, suspending its execution so that a new user prompt appears immediately. Use the jobs command to discover the identities of background jobs.
Prints a calendar for the specified month of the specified year.
Prints the contents of the specified files.
Changes the current working directory to the user’s home directory or the specified directory.