How to create printable version of a man page..?

Most of us are always feel boring to read man pages in terminal window. what if we have a printable version of a particular command's manpage.? Nice isn't it.. so, how we can create a printable version of a manpage...

Step 1: Issue the following command in terminal
$man -t > destination_file_path.ps

Ex:$man -t mkdir > ~/Desktop/mkdir_manpage_printableversion.ps

Now you got a file named " mkdir_manpage_printableversion.ps " in your Desktop :). you can now print and use it..

Note: .ps(Postscript) is the default file type used to print.  It can be opened with any PDF viewer and can be printed.

How to find filesystem type in linux machine?

There are many ways to find the filesystem of a partition in linux (provided the partition mounted)
Following are the command line tools run these commands as is in terminal.

1.  cat /etc/fstab

2.  cat /etc/mtab

3.  mount

4.  df -T

Note:  You should know the partition number (like /dev/sda2, /dev/sda4 etc.,) or the partition label (Like mypendrive, 8GB_drive etc.,) or the UUID number.

How to lock a linux user from logging into a machine?

In some scenarios its needed to lock a user to login into his own account.  This can be achieved by many ways.

1.  GUI way

 1.1 Go to System -> Administration -> Users and Groups

 1.2 Now select the particular user from the left side, then click on the advanced settings button

 1.3 Click on the Advanced tab then tick the check box with value "Disable Account"

 1.4 To revoke follow the 1.1 & 1.2 now you can see a "Enable account" button click and enable

2. Terminal way

1. As a root user issue the following command in the terminal

    $sudo passwd -l "username of the user to lock"