How do I loop through files in a directory under UNIX like operating systems?
How do I truncate or shrink large text file under UNIX / Linux operating systems?
How do I remove a directory in Linux using the shell prompt?
How do I set the prefixlen for an IPv6 address under FreeBSD operating systems?
How do I start or stop Apache web server using shell prompt option under Apple OS X UNIX operating systems?
ow do I clear the shell history in Ubuntu Linux?