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I'm writing a bash wrapper script that will pass arguments to the command. I need to find out the last argument if I call the wrapper as follows:

./wrapper -a -b --longarg=foo thisfilename.txt
./wrapper -a -b thisfilename.txt
./wrapper -a --next=true thisfilename.txt

Where,
=> $@ is all of them.
=> $0 is script name.
=> $1 is first arg.

I want thisfilename.txt stored in a shell variable called $last. How do I find the last argument passed to a shell script written in bash or ksh under Unix like operating systems?
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Firefox Disable / Hide New Tab Page

I've upgraded to Firefox v13. However, I don't like the new tab page. I'm concerned about my privacy. How do disable or hide new tab page while using Firefox browser version 13? How do you get rid of the "new tab" page that shows recently visited pages?
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Unix Copy Command Examples [ cp command ]

How do I copy files under Unix operating system using ksh or csh or bash shell prompt?
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I'm a home user and how do I install VirtualBox virtualization software for my home use under Debian Linux 6 operating systems?
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How do I see a list of all exported variables and functions under Unix bash shell?
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HowTo: Open a Tar.gz File In Linux / Unix

I've received a file called date.tar.gz. How do I open/extract/unpack a tar.gz file on Linux or Unix like operating systems using shell prompt?
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Linux / Unix: Find Inode Of a File Command

How do I find out an inode (index-node) of a file under Unix like operating systems?
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HowTo: Nginx Block User Agent

How do I block a http user agent or a software agent using Nginx web server under Linux or Unix like operating systems?
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I'm writing a shell script for automation purpose. The output the path of the current working directory is stored in $PWD or it can be obtained using the pwd command. How do I find out find out 3rd field separated by the forward slash (/) delimiter using $PWD under Unix like operating systems?
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My router configured by ISP tech and it is set to get DNS server address automatically from upstream. Is there is a way to find out the IP address of the dns server used by my router which is located at 192.168.1.1? Is there Linux, Unix, Apple OS X, or MS-Windows command that I can use get the same information?
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