Asianet Dataline is an ISP in Kerala and they use a web browser based authentication system to log the user onto their network. One of their most popular plans the - Homenet 475 offers free unlimited downloads from 2AM to 8AM. Now if there was a way to turn on your system at 2AM, automatically login to Asianet and turn your download manager on and then shutdown at 8AM it would have been perfect. The only problem is that the http based authentication system makes it a bit unwieldy to automate. Well not really :-). We have created a bash script to automate this login process.
One of the most common compression formats used in GNU/Linux and variants is tar.gz. A tar.gz file is nothing but a gzipped tar archive. These days users of GNU/Linux system seldom have to use the command line to create or extract tar.gz archives. But it is a useful command to keep in your arsenal if you are a system administrator.