Cheatsheet on Nerdsid.com

Linux Journalctl Command Cheat Sheet

Wed, 15 Apr 2026 06:39:17 +0000

I recently needed to free up disk space by removing old system logs, so I collected the command I used and other useful journalctl commands for future reference.

Disk usage & vacuum (remove old logs)

Show journal disk usage:

 
 BASH
 
sudo journalctl --disk-usage

Remove archived journal files until total size is below X:

 
 BASH
 
sudo journalctl --vacuum-size=500M

Remove archived journal files older than a time:

 
 BASH
 
sudo journalctl --vacuum-time=3d

Remove archived journal files, keeping only the most recent N files:

Ultimate Vi Shortcuts Cheat Sheet

Tue, 07 Apr 2026 20:43:00 +0000

Big picture of Vim commands

Normal mode (default)

 
 ├── Navigation (h, j, k, l, G)
 ├── Editing (d, c, x)
 ├── Insert triggers (i, a, o, O, A)

Insert mode → typing text
Visual mode → selecting text
Command mode (:) → commands like :w, :q, :10,20d

 
 TEXT
 
G

G → go to last line

2. Editing / insertion commands

o, O, A : These change the file and switch you to insert mode.

Linux Commands Cheat Sheet (Most Used Commands)

Fri, 03 Apr 2026 07:32:28 +0530

Disk Usage / File Analysis
AWS S3 commands

Disk Usage / File Analysis

Find out space taken by files older than 5 days

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

Keep last 100d fies

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

 
 BASH
 
truncate -s 50M catalina.out

 
 BASH
 
ls -d */

Find out Year month of files

 
 BASH
 
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:

Cheatsheet on Nerdsid.com

Linux Journalctl Command Cheat Sheet

Disk usage & vacuum (remove old logs)

Ultimate Vi Shortcuts Cheat Sheet

Big picture of Vim commands

Navigation (movement commands)

2. Editing / insertion commands

Linux Commands Cheat Sheet (Most Used Commands)

Table of Contents

Disk Usage / File Analysis

Find out space taken by files older than 5 days

Keep last 100d fies

Find out Year month of files

List all files other than `.gz`

Cheatsheet on Nerdsid.com

Linux Journalctl Command Cheat Sheet

Disk usage & vacuum (remove old logs)

Ultimate Vi Shortcuts Cheat Sheet

Big picture of Vim commands

Navigation (movement commands)

2. Editing / insertion commands

Linux Commands Cheat Sheet (Most Used Commands)

Table of Contents

Disk Usage / File Analysis

Find out space taken by files older than 5 days

Keep last 100d fies

Find out Year month of files

List all files other than .gz

List all files other than `.gz`