There are various solutions depending on your need, you can link it from the server or have it installed on local machine.
Check out vmware.com,...
Have you tried using virtual machines, you can give one machine for each user. and delete them when not required.
you can use the commands listed here
The [ in bash programming is a command in itself which basically tests the condition and returns true or false. Hence the if and the [ have to be...
Separate names with a comma.