Leveling Up — Linux Commands You’ll Actually Use (30-Day RHCSA + Ansible Journey)

You survived your first Linux commands? Congratulations, you’re officially dangerous! Now let’s add some serious power moves to your toolbox — still beginner-friendly, but with enough spice to impress. Commands That Make Life Easier 1. uname -r — Know Your Kernel Like You Know Your Coffee uname -r Purpose: Displays your Linux kernel version. Use it when: You're troubleshooting or bragging about running the latest and greatest. 2. whoami — Existential Crisis, Solved whoami Purpose: Tells you which user you're currently logged in as. Use it when: You forgot who you are (at least digitally). 3. df -h — How Much Room Left for Bad Decisions? df -h Purpose: Shows disk space usage in a human-readable format. Use it when: You want to check if you’re running out of space before downloading more cat memes. 4. top — The Pulse of Your Machine top Purpose: Live view of running processes and system resource usage. Use it when: You hear the fans spinning like a jet engine. 5. cat — Fastest Way to Peek at a File cat filename.txt Purpose: Displays the contents of a file. Use it when: You need a quick look without opening an editor. 6. chmod — Because Permissions Matter chmod 755 myscript.sh Purpose: Changes file permissions. Use it when: Your script refuses to run because it's "not executable." 7. man — The Book of Secrets man ls Purpose: Opens the manual for a command. Use it when: You want to dive deeper into how a command works.

Apr 28, 2025 - 02:25

Leveling Up — Linux Commands You’ll Actually Use (30-Day RHCSA + Ansible Journey)

You survived your first Linux commands? Congratulations, you’re officially dangerous!

Now let’s add some serious power moves to your toolbox — still beginner-friendly, but with enough spice to impress.

Commands That Make Life Easier

1. `uname -r` — Know Your Kernel Like You Know Your Coffee

uname -r

Purpose: Displays your Linux kernel version.

Use it when: You're troubleshooting or bragging about running the latest and greatest.

2. `whoami` — Existential Crisis, Solved

whoami

Purpose: Tells you which user you're currently logged in as.

Use it when: You forgot who you are (at least digitally).

3. `df -h` — How Much Room Left for Bad Decisions?

df -h

Purpose: Shows disk space usage in a human-readable format.

Use it when: You want to check if you’re running out of space before downloading more cat memes.