10 Powerful Bash Tricks Every Beginner Should Know 💡📚

Bash is a must-know tool for developers, but many only use basic commands. Here are 10 powerful Bash tricks to speed up your workflow and make you feel like a terminal ninja.

1. Use !! to Repeat the Last Command

Typed a command but forgot sudo? Instead of retyping, just run:

sudo !! 

This reruns the last command with sudo.

2. Use !$ to Reuse the Last Argument

Instead of retyping the last argument, use !$:

mkdir my_project cd !$ 

This changes into the newly created directory.

3. Find Large Files Quickly

Need to free up space? Find large files with:

find . -type f -size +100M 

This lists all files larger than 100MB in the current directory.

4. Extract Any Compressed File with One Command

No need to remember different extract commands. Just use:

extract() { if [ -f "$1" ]; then case "$1" in *.tar.bz2) tar xjf "$1" ;; *.tar.gz) tar xzf "$1" ;; *.zip) unzip "$1" ;; *.rar) unrar x "$1" ;; *.7z) 7z x "$1" ;; *) echo "Unknown file format" ;; esac else echo "'$1' is not a valid file" fi } 

Save this in your .bashrc or .bash_profile and run extract filename.zip.

5. Monitor Real-Time File Changes

To see live changes in a file, use:

tail -f filename.log 

Great for monitoring logs or debugging.

6. Rename Multiple Files at Once

Easily rename .txt files to .md using:

for file in *.txt; do mv "$file" "${file%.txt}.md"; done 

This renames all .txt files to .md.

7. Kill a Process by Name

Instead of finding and killing a process manually, run:

pkill -f process_name 

This kills any process matching process_name.

8. Copy Files Over SSH Like a Pro

Instead of scp every time, mount a remote folder using SSH:

sshfs user@remote:/path/to/folder /local/mount 

Now, you can access remote files like they’re local!

9. Create a Quick and Simple HTTP Server

Serve the current directory over HTTP with:

python3 -m http.server 8000 

Now, open http://localhost:8000 in your browser.

10. Make Your cd Command Smarter

Tired of typing long paths? Add this to .bashrc:

shopt -s autocd 

Now, typing a directory name alone will cd into it.

Final Thoughts

These Bash tricks will speed up your workflow and help you work like a pro. Got your own favorite Bash trick? Share it in the comments!

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