Stop Guessing in Linux: locate, find, grep, awk & sed Explained
In this CS221 lesson on Linux file searching, we walk step-by-step through the most important command-line tools every Linux user, developer, and system administrator must know.
You’re on a Linux system… you know a file exists… but you don’t know where it is — or even what’s inside it.
How do you actually find it?
In this video we break down the five essential search and text-processing tools:
• locate – lightning-fast filename search
• find – accurate, permission-aware filesystem search
• grep – search inside files for meaningful text
• awk – extract structured data from columns
• sed – automate text transformation
We also explore:
Why locate is fast (and its limitation with updatedb)
How find interacts with Linux permissions
Recursive searches with grep
The power of the pipe (|) and command chaining
Field-based processing with awk
Safe vs dangerous use of sed -i
When to escalate from simple tools to more advanced ones
By the end of this video, you’ll understand not just how to run these commands — but when to use each one.
Progression to remember:
Do I know the filename? → locate
Need accuracy? → find
Searching content? → grep
Need structure? → awk
Need to automate changes? → sed
If you made it this far… leave a comment:
“Enough Sed!” 😄
Next up: Editing files in Linux with vim and nano.
If this helped you, be sure to like and subscribe — it really helps the channel grow.
Blessings,
Mike
CWM – Coding With Mike