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Linux
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Linux is a Unix-like operating system. It is a free and open-source operating system, which means that it is available to everyone to use and modify. Linux is used by millions of people around the world, and it is the operating system of choice for many servers, supercomputers, and embedded devices.
less Command in Linux: Complete Guide to Advanced File Paging, Navigation, and Parameters
Somewhere around my second year of using Linux seriously, someone watched me open a huge log file with…
fold Command in Linux: Complete Guide to Text Wrapping, Line Width Control, and Parameters
I ran into fold while trying to format some plain-text output for a fixed-width terminal that a legacy…
file Command in Linux: Complete Guide to File Type Identification and Parameters
Years ago I inherited a directory full of files with no extensions — a legacy export process had…
expand Command in Linux: Complete Guide to Tab-to-Space Conversion and Parameters
I still remember the first time a script I wrote broke because of a stray tab character sitting…
diff Command in Linux: Complete Guide to File Comparison, Line Differences, and Parameters
I use diff almost every single day, usually without even thinking about it, because it’s baked into git,…
dd Command in Linux: Complete Guide to Disk Duplication, Data Conversion, and Parameters
dd has a reputation, and it’s earned one. It’s the command people jokingly call “disk destroyer” because a…
cat Command in Linux: Complete Guide to File Concatenation, Display, and Parameters
cat was probably the second or third Linux command I ever learned, right after ls and cd, and…
which Command in Linux: Complete Guide to Locating Executable Files and Parameters
Every time I’ve debugged a “wrong version of a tool is running” problem — and there have been…
whereis Command in Linux: Complete Guide to Finding Binary, Source, and Manual Files and Parameters
I didn’t really understand what whereis was for until I ran it side-by-side with which on the same…
locate Command in Linux: Complete Guide to Fast File Searching, Database Update, and Parameters
The first time I ran locate on a server after being used to find, the speed difference genuinely…