Useful date Command Options
The Unix date command displays the date and the time of day. The standard output of the date command looks like this:
Sat Sep 25 14:38:35 PDT 1999
The date command lets you use options to display pieces of the date and time information in a selected format. If you want to display only the day of the month, you would use this command:
$ date +%e
Start the format specification with a plus sign. Follow this with one or more percent-sign-marked letters, which indicate which piece of the date you want.
%e represents the day of the month.
%b represents the 3-letter abbreviation for the month:
$ date +%b
To display the month and the day of the month, use the command below.
$ date +%b-%e
The dash in this command is literal. You can insert characters between the percent-sign-marked pieces of the date and they will be displayed literally in your output:
Test out these date command options by logging into your UNIX account and typing them in at the shell prompt.