@@ -78,12 +78,12 @@ What is the effect of the `-3` parameter ?
You can add as many parameters as you want to your command, try `-3 -1` what is the meaning of the `-1` parameter ?
The `-H` option display the month of a given date in a `yyyy-mm-dd` format. Try to display your month of birth in vertical format.
The `-d` option display the month of a given date in a `yyyy-mm` format. Try to display your month of birth.
Traditionally, parameters are *named* which means that they are in the form of:
*`-X` for an on/off option (like `cal -3`)
*`-X something` for an input option (like `cal -H yyyy-mm-dd`)
*`-X something` for an input option (like `cal -d yyyy-mm`)
Here the name of the parameter is `X`, but software can also accept list of unnamed parameters. Try the following:
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@@ -139,7 +139,7 @@ What changed compared to the `ls` command without this option ?
Go to your home folder with the bare `cd` command and run the `ls -a` command again. The `-a` option makes the `ls` command list hidden files and folders. On Unix systems, hidden files and folders are all files and folders whose name starts with a "**.**".
