A lot of information is available about individual files on a Unix system. For example, the ls -l command will display the permissions matrix and ls -i will display a file’s inode. But, if we want to ...

One of the files that the average Unix sysadmin rarely looks at, almost never changes and yet depends on every time he or she reboots a system is the /etc/inittab file. This modest little file ...

Log files on Unix systems can easily grow to hundreds of thousands or even millions of lines. Here's a simple way to pluck out every Nth line. Head and tail are great commands when you want to look ...

Have you ever wanted to read a file one line at a time in a shell script and found the task to be a lot more trouble than you ever imagined? If you use a “for line ...

November 28, 2012 Add as a preferred source on Google Add as a preferred source on Google You are not alone. In fact, I was pretty confused by file permissions for a long time, but it’s actually very ...

GUIs are great—we wouldn’t want to live without them. But if you’re a Mac or Linux user and you want to get the most out of your operating system (and your keystrokes), you owe it to yourself to get ...

is the name of a UNIX command, executable program, or shell script to which you want to route output or from which you want to read input. The command(s) must be enclosed in either double or single ...

The operating system your MacBook runs, OS X, is built on top of UNIX, and Terminal provides you with access to the underlying UNIX system commands. Most server software that your business would want ...