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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.
vmstat Command in Linux: Complete Guide to Virtual Memory Statistics and Parameters
There’s a particular moment every sysadmin has: a server is “slow,” nobody can say exactly why, and top…
uptime Command in Linux: Complete Guide to System Uptime and Load Average Parameters
uptime is one of the first commands I ever learned on Linux, and it’s still one of the…
How to Use Vi Editor in Linux: Complete Beginner’s Guide to Text Editing and Commands
I still remember the panic the first time I accidentally opened vi on a remote server, typed a…
Linux File System: Complete Guide to Directory Structure, Mount Points, and File Management
The first time I hopped from Windows to Linux full-time, the thing that threw me off most wasn’t…
Repeating Previously Typed Commands in Linux: Complete History and Command Recall Guide
Somewhere around my second month of using the Linux command line seriously, I stopped retyping long commands from…
cal and date Commands in Linux: Complete Guide to Calendar Display, Date Settings, and Parameters
Between the two commands in this guide, I use date constantly — in scripts, logs, cron expressions, filenames…
umount Command in Linux: Complete Guide to Unmounting File Systems and Parameters
The classic frustration with umount isn’t the command syntax — it’s the moment you run it and get…
tty Command in Linux: Complete Guide to Terminal Identification and Parameters
tty is one of those commands that looks almost too simple to write a guide about — it…
sync Command in Linux: Complete Guide to Flushing File System Buffers and Parameters
I learned to respect sync the hard way — years ago, pulling a USB drive right after a…
swapon Command in Linux: Complete Guide to Enabling Swap Space and Parameters
Swap gets a bad reputation it doesn’t fully deserve. A lot of people hear “swap is being used”…