Linux Commands Cheat Sheet (Most Used Commands)

Table of Contents

• Disk Usage / File Analysis
• AWS S3 commands

Disk Usage / File Analysis

Find out space taken by files older than 5 days

find . -type f -mtime +5 -print0 | du --files0-from=- -ch | grep total

Keep last 100d fies

ls -t | sed -e '1,100d' | xargs -d '\n' rm -f --

truncate -s 50M catalina.out

ls -d */

Find out Year month of files

stat -c '%y' * | awk '{print $1}' | xargs -I{} date -d {} "+%b %Y" | sort -u

List all files other than .gz

If you want this to do recursively:

find . -type f ! -name "*.gz"

! -name "*.gz" → excludes .gz files

If you want only in current directory (no recursion):

find . -maxdepth 1 -type f ! -name "*.gz"

AWS S3 commands

Download files of a particulat date (files having date format in name):

Here’s the AWS CLI command to download only the March 23 files:

aws s3 cp s3://<your-bucket-name>/ . --recursive --exclude "*" --include "*.2026-03-23.*"

This uses --exclude “” to block everything, then --include “.2026-03-23.*” to selectively grab the three 2026-03-23 files.

s3 remove all files from a dir (prefix)

To remove all files from a directory (prefix) in S3:

aws s3 rm s3://your-bucket-name/your-prefix/ --recursive

The --recursive flag deletes everything under that prefix.

Dry run – see what would be deleted without actually deleting:

aws s3 rm s3://your-bucket-name/your-prefix/ --recursive --dryrun