man

man

Man command internally invokes the sed command to modify the contents of manual pages(documentation written for the commands) and delivers a user readable output.

Examples:

Example 1:

To read documentation on sed  command  page-wise

/home/b3456/$ man sed | pg

Example  2:

suppose that you want to read the entire documentation of all the commands present  in an unix environment and to save all of its  pages in a single text file, you can run the following script from the command line to do so.

/home/b3456/$  cd  /usr/bin

/usr/bin/$for   i   in  `ls * `   

>do

>man $i  >>/home/b3456/man_all.txt  2>/dev/null

>done

Note: “>” symbol comes by default in all the lines

Here 2> indicates standard error.It is redirected to /dev/null(which is discarded)

Now you can  take a print out of the text file you have just generated( make full  use of office printer  umm!!) and study all commands at home.