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What's GNU in Old Utilities

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Old-timers (such as some Linux Magazine columnists) have been using Unix and Linux since the days of… well, it’s been a while. If you’re a long-time user too, you may think you know all of the command-line options and features of common utilities like ls. However, a quick glance through the ls man or info pages, though, shows that hackers have been busy adding capabilities to ls and many other longstanding utilities.

Even if you aren’t old as the hills (and you’ve never heard of the FORTRAN carriage-control utility asa), you may still be surprised at some of the things common utilities can do. That’s especially true if you’ve just come to Linux from another system that doesn’t have GNU versions of standard Unix utilities.

This month, let’s take a tour of new features of ls that could have you brushing the cobwebs off of your documentation. Along the way, we’ll also see how “block size” is calculated in GNU utilities. Let’s dig in.

Full Article.

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Learning The Linux File System

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