Show disk usage in human-readable format
Useful Linux one-liner
df -h
Categories
Browse grouped command cards or search directly below.
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One-liners
AI tools
System information
System control
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Printing
JSON
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Search & Find
Git
SSH
Video & Audio
Package manager
Text Processing
Compression & Archiving
Backup & Imaging
Hacking tools
Terminal games
Cryptocurrencies
Shell Scripting
Tmux
Regular Expressions
VIM Text Editor
Emacs Text Editor
Nano Text Editor
Pico Text Editor
Micro Text Editor
File inspection
21 commands
Show directory sizes sorted
Useful Linux one-liner
du -sh * | sort -hr
Generate random password
Useful Linux one-liner
< /dev/urandom tr -dc A-Za-z0-9 | head -c 32; echo
Count lines in a file
Useful Linux one-liner
wc -l file.txt
Remove duplicate lines
Useful Linux one-liner
sort file | uniq
Download file with resume
Useful Linux one-liner
wget -c url
Empty/truncate a file
Useful Linux one-liner
> file.txt
Monitor file changes
Useful Linux one-liner
tail -f logfile
Encrypt file with gpg
Useful Linux one-liner
gpg -c file
Split large file
Useful Linux one-liner
split -b 1G largefile part-
Reassemble split files
Useful Linux one-liner
cat part-* > largefile
Check file checksum
Useful Linux one-liner
sha256sum file
Show file with line numbers
Useful Linux one-liner
nl file.txt
Convert DOS to Unix line endings
Useful Linux one-liner
dos2unix file
Progress bar for any command
Useful Linux one-liner
command | pv -s $(du -b input | cut -f1)
View PDF in terminal
Useful Linux one-liner
pdftotext file.pdf - | less
Rainbow text
Useful Linux one-liner
echo "text" | lolcat
Show most used commands
Useful Linux one-liner
history | awk '{print $2}' | sort | uniq -c | sort -nr | head
Extract any archive
Useful Linux one-liner
a() { case $1 in *.tar.gz) tar xzf $1;; *.zip) unzip $1;; esac; }; a file
Create sparse 10GB file
Useful Linux one-liner
truncate -s 10G file.img
Merge multiple PDFs
Useful Linux one-liner
gs -dBATCH -dNOPAUSE -sDEVICE=pdfwrite -sOutputFile=out.pdf in1.pdf in2.pdf
Directory listing
7 commands
Create 100 numbered directories
Useful Linux one-liner
mkdir project{01..100}
Find largest files/directories in current directory
Useful Linux one-liner
du -h . | sort -hr | head -20
List files by modification time
Useful Linux one-liner
ls -lt
Create directory and cd into it
Useful Linux one-liner
mkdir dir && cd dir
Show only directories
Useful Linux one-liner
ls -d */
Tree view of directory
Useful Linux one-liner
tree
Count files in directory
Useful Linux one-liner
ls | wc -l
HTTP and downloads
7 commands
Spin up a local HTTP server
Useful Linux one-liner
python3 -m http.server 8000
Get your public IP address
Useful Linux one-liner
curl ifconfig.me
Show weather in terminal
Useful Linux one-liner
curl wttr.in
Get full weather report
Useful Linux one-liner
curl v2.wttr.in
Quick HTTP server in Ruby
Useful Linux one-liner
ruby -run -e httpd . -p 8000
Quick HTTP server in PHP
Useful Linux one-liner
php -S localhost:8000
Quick HTTP server in Node.js
Useful Linux one-liner
npx http-server
Search and filters
7 commands
Find files by name
Useful Linux one-liner
find . -iname "*.log"
Find files larger than 100MB
Useful Linux one-liner
find . -type f -size +100M
Grep recursively ignoring case
Useful Linux one-liner
grep -ir "text" .
Delete files older than 30 days
Useful Linux one-liner
find . -mtime +30 -delete
Find and delete empty directories
Useful Linux one-liner
find . -type d -empty -delete
Check battery percentage
Useful Linux one-liner
upower -i $(upower -e | grep BAT) | grep percentage
Find broken symlinks
Useful Linux one-liner
find . -xtype l
Media tools
6 commands
Play a video in terminal
Useful Linux one-liner
mplayer -vo caca video.mp4
Convert image to different format
Useful Linux one-liner
convert input.jpg output.png
Create animated GIF from images
Useful Linux one-liner
convert -delay 10 -loop 0 *.png animation.gif
Download YouTube video
Useful Linux one-liner
yt-dlp url
Play YouTube video in terminal
Useful Linux one-liner
mpv url
Convert video to GIF
Useful Linux one-liner
ffmpeg -i input.mp4 output.gif
Network diagnostics
6 commands
Simulate slow typing
Useful Linux one-liner
echo "text" | pv -qL 10
Kill process by name
Useful Linux one-liner
pkill process_name
Pipe output to clipboard
Useful Linux one-liner
command | xclip -sel clip
Burn ISO to USB
Useful Linux one-liner
dd if=iso.iso of=/dev/sdX bs=4M status=progress
Disk speed test
Useful Linux one-liner
dd if=/dev/zero of=test bs=1G count=1 oflag=dsync
One-liner web server in bash
Useful Linux one-liner
while true; do echo -e "HTTP/1.1 200 OK\n\n$(date)" | nc -l 8080; done
File operations
4 commands
Quickly backup a file
Useful Linux one-liner
cp file{,.bak}
List open network ports
Useful Linux one-liner
ss -tuln
Create symlink
Useful Linux one-liner
ln -s target link
Batch rename files
Useful Linux one-liner
for f in *.txt; do mv "$f" "${f%.txt}.bak"; done
Shell workflow
4 commands
Change to the previous directory
Useful Linux one-liner
cd -
Search command history interactively
Useful Linux one-liner
Ctrl+R
Reload shell configuration
Useful Linux one-liner
source ~/.bashrc
Alias to repeat last command
Useful Linux one-liner
alias r='fc -s'
Archive and compression
3 commands
Create a tar.gz backup
Useful Linux one-liner
tar czf backup.tar.gz directory/
Extract a tar.gz archive
Useful Linux one-liner
tar xzf archive.tar.gz
Compress with bzip2
Useful Linux one-liner
tar cjf archive.tar.bz2 dir/
SSH and remote access
2 commands
Copy with progress bar
Useful Linux one-liner
rsync -ah --progress src dest
Mount remote directory over SSH
Useful Linux one-liner
sshfs user@host:/remote /local
Text processing
2 commands
Play ASCII Star Wars
Useful Linux one-liner
telnet towel.blinkenlights.nl
Search and replace in files
Useful Linux one-liner
sed -i 's/old/new/g' *.txt
cal commands
2 commands
Show calendar
Useful Linux one-liner
cal
Show colorful calendar
Useful Linux one-liner
cal -3
command commands
2 commands
Check if command exists
Useful Linux one-liner
command -v cmd >/dev/null && echo yes
Run command in background
Useful Linux one-liner
command &
git commands
2 commands
Show current git branch
Useful Linux one-liner
git branch --show-current
Show git status nicely
Useful Linux one-liner
git status -sb
watch commands
2 commands
Watch command output refresh every 2 seconds
Useful Linux one-liner
watch command
Display clock in terminal
Useful Linux one-liner
watch -n 1 date
!! commands
1 commands
Repeat the last command
Useful Linux one-liner
!!
Disk and filesystems
1 commands
Create RAM disk
Useful Linux one-liner
mount -t tmpfs -o size=1G tmpfs /mnt/ram
Processes and services
1 commands
View processes sorted by CPU
Useful Linux one-liner
top
Users and permissions
1 commands
Run the previous command with sudo
Useful Linux one-liner
sudo !!
^wrong^correct^ commands
1 commands
Fix typo in the previous command
Useful Linux one-liner
^wrong^correct^
cmatrix commands
1 commands
Matrix digital rain
Useful Linux one-liner
cmatrix
crontab commands
1 commands
List cron jobs
Useful Linux one-liner
crontab -l
ctrl+x commands
1 commands
Edit current command line in your editor
Useful Linux one-liner
Ctrl+X Ctrl+E
dd commands
1 commands
Securely wipe drive
Useful Linux one-liner
dd if=/dev/urandom of=/dev/sdX
echo commands
1 commands
for commands
1 commands
Fireworks animation
Useful Linux one-liner
for i in {1..50}; do echo -e "\e[${((RANDOM%7+31))}m✨\e[0m"; sleep 0.1; done
fortune commands
1 commands
Display fortune and cow
Useful Linux one-liner
fortune | cowsay
jq commands
1 commands
Pretty-print JSON from stdin
Useful Linux one-liner
jq .
lshw commands
1 commands
List hardware info
Useful Linux one-liner
lshw -short
neofetch commands
1 commands
Display system info with ASCII art
Useful Linux one-liner
neofetch
nohup commands
1 commands
Run detached from terminal
Useful Linux one-liner
nohup command &
qrencode commands
1 commands
Generate QR code
Useful Linux one-liner
qrencode -t ANSI "text"
screenfetch commands
1 commands
Display system information beautifully
Useful Linux one-liner
screenfetch or neofetch
script commands
1 commands
Record terminal session
Useful Linux one-liner
script session.log
scriptreplay commands
1 commands
Replay terminal session
Useful Linux one-liner
scriptreplay -t timing.log session.log
sensors commands
1 commands
Monitor CPU temperature
Useful Linux one-liner
sensors
sl commands
1 commands
Run the train animation
Useful Linux one-liner
sl
timedatectl commands
1 commands
Show current timezone
Useful Linux one-liner
timedatectl
uptime commands
1 commands
Check system uptime
Useful Linux one-liner
uptime
xmllint commands
1 commands
Pretty-print XML
Useful Linux one-liner
xmllint --format file.xml
sudo !!
May affect permissions or system state. Check the target first.
python3 -m http.server 8000
Copy it and replace filenames, paths, or keywords as needed.
telnet towel.blinkenlights.nl
Requires network or a remote resource.
mplayer -vo caca video.mp4
Copy it and replace filenames, paths, or keywords as needed.
screenfetch or neofetch
Copy it and replace filenames, paths, or keywords as needed.
fortune | cowsay
Uses pipes, overwrite, or deletion. Check paths and options first.
echo "text" | pv -qL 10
Uses pipes, overwrite, or deletion. Check paths and options first.
cmatrix
Copy it and replace filenames, paths, or keywords as needed.
mkdir project{01..100}
Copy it and replace filenames, paths, or keywords as needed.
cd -
Copy it and replace filenames, paths, or keywords as needed.
cp file{,.bak}
Copy it and replace filenames, paths, or keywords as needed.
^wrong^correct^
Copy it and replace filenames, paths, or keywords as needed.
curl ifconfig.me
Requires network or a remote resource.
!!
Copy it and replace filenames, paths, or keywords as needed.
Ctrl+X Ctrl+E
Copy it and replace filenames, paths, or keywords as needed.
jq .
Copy it and replace filenames, paths, or keywords as needed.
du -h . | sort -hr | head -20
Uses pipes, overwrite, or deletion. Check paths and options first.
df -h
Copy it and replace filenames, paths, or keywords as needed.
du -sh * | sort -hr
Uses pipes, overwrite, or deletion. Check paths and options first.
tar czf backup.tar.gz directory/
Copy it and replace filenames, paths, or keywords as needed.
tar xzf archive.tar.gz
Copy it and replace filenames, paths, or keywords as needed.
watch command
Copy it and replace filenames, paths, or keywords as needed.
pkill process_name
May affect permissions or system state. Check the target first.
top
Copy it and replace filenames, paths, or keywords as needed.
ss -tuln
Copy it and replace filenames, paths, or keywords as needed.
< /dev/urandom tr -dc A-Za-z0-9 | head -c 32; echo
Uses pipes, overwrite, or deletion. Check paths and options first.
Ctrl+R
Copy it and replace filenames, paths, or keywords as needed.
wc -l file.txt
Copy it and replace filenames, paths, or keywords as needed.
sort file | uniq
Uses pipes, overwrite, or deletion. Check paths and options first.
find . -iname "*.log"
Copy it and replace filenames, paths, or keywords as needed.
find . -type f -size +100M
Copy it and replace filenames, paths, or keywords as needed.
rsync -ah --progress src dest
Requires network or a remote resource.
wget -c url
Requires network or a remote resource.
sshfs user@host:/remote /local
Requires network or a remote resource.
command -v cmd >/dev/null && echo yes
Uses pipes, overwrite, or deletion. Check paths and options first.
ls -lt
Copy it and replace filenames, paths, or keywords as needed.
grep -ir "text" .
Copy it and replace filenames, paths, or keywords as needed.
> file.txt
Uses pipes, overwrite, or deletion. Check paths and options first.
mkdir dir && cd dir
Uses pipes, overwrite, or deletion. Check paths and options first.
tar cjf archive.tar.bz2 dir/
Copy it and replace filenames, paths, or keywords as needed.
curl wttr.in
Requires network or a remote resource.
curl v2.wttr.in
Requires network or a remote resource.
xmllint --format file.xml
Copy it and replace filenames, paths, or keywords as needed.
convert input.jpg output.png
Copy it and replace filenames, paths, or keywords as needed.
convert -delay 10 -loop 0 *.png animation.gif
Copy it and replace filenames, paths, or keywords as needed.
sl
Copy it and replace filenames, paths, or keywords as needed.
neofetch
Copy it and replace filenames, paths, or keywords as needed.
tail -f logfile
Copy it and replace filenames, paths, or keywords as needed.
sed -i 's/old/new/g' *.txt
Copy it and replace filenames, paths, or keywords as needed.
ls -d */
Copy it and replace filenames, paths, or keywords as needed.
tree
Copy it and replace filenames, paths, or keywords as needed.
command | xclip -sel clip
Uses pipes, overwrite, or deletion. Check paths and options first.
ln -s target link
Copy it and replace filenames, paths, or keywords as needed.
git branch --show-current
Copy it and replace filenames, paths, or keywords as needed.
find . -mtime +30 -delete
Copy it and replace filenames, paths, or keywords as needed.
find . -type d -empty -delete
Copy it and replace filenames, paths, or keywords as needed.
cal
Copy it and replace filenames, paths, or keywords as needed.
cal -3
Copy it and replace filenames, paths, or keywords as needed.
qrencode -t ANSI "text"
Copy it and replace filenames, paths, or keywords as needed.
script session.log
Copy it and replace filenames, paths, or keywords as needed.
scriptreplay -t timing.log session.log
Copy it and replace filenames, paths, or keywords as needed.
upower -i $(upower -e | grep BAT) | grep percentage
Uses pipes, overwrite, or deletion. Check paths and options first.
sensors
Copy it and replace filenames, paths, or keywords as needed.
crontab -l
Copy it and replace filenames, paths, or keywords as needed.
gpg -c file
May affect permissions or system state. Check the target first.
mount -t tmpfs -o size=1G tmpfs /mnt/ram
May affect permissions or system state. Check the target first.
command &
Uses pipes, overwrite, or deletion. Check paths and options first.
nohup command &
Uses pipes, overwrite, or deletion. Check paths and options first.
split -b 1G largefile part-
Copy it and replace filenames, paths, or keywords as needed.
cat part-* > largefile
Uses pipes, overwrite, or deletion. Check paths and options first.
sha256sum file
Copy it and replace filenames, paths, or keywords as needed.
yt-dlp url
Requires network or a remote resource.
mpv url
Requires network or a remote resource.
nl file.txt
Copy it and replace filenames, paths, or keywords as needed.
dos2unix file
Copy it and replace filenames, paths, or keywords as needed.
source ~/.bashrc
Copy it and replace filenames, paths, or keywords as needed.
uptime
Copy it and replace filenames, paths, or keywords as needed.
command | pv -s $(du -b input | cut -f1)
Uses pipes, overwrite, or deletion. Check paths and options first.
pdftotext file.pdf - | less
Uses pipes, overwrite, or deletion. Check paths and options first.
dd if=iso.iso of=/dev/sdX bs=4M status=progress
May affect permissions or system state. Check the target first.
dd if=/dev/urandom of=/dev/sdX
May affect permissions or system state. Check the target first.
lshw -short
Copy it and replace filenames, paths, or keywords as needed.
dd if=/dev/zero of=test bs=1G count=1 oflag=dsync
May affect permissions or system state. Check the target first.
Play beep
文本echo -e "\a"
Copy it and replace filenames, paths, or keywords as needed.
timedatectl
Copy it and replace filenames, paths, or keywords as needed.
for i in {1..50}; do echo -e "\e[${((RANDOM%7+31))}m✨\e[0m"; sleep 0.1; done
Uses pipes, overwrite, or deletion. Check paths and options first.
Rainbow text
文本echo "text" | lolcat
Uses pipes, overwrite, or deletion. Check paths and options first.
watch -n 1 date
Copy it and replace filenames, paths, or keywords as needed.
ls | wc -l
Uses pipes, overwrite, or deletion. Check paths and options first.
find . -xtype l
Copy it and replace filenames, paths, or keywords as needed.
ruby -run -e httpd . -p 8000
Copy it and replace filenames, paths, or keywords as needed.
php -S localhost:8000
Copy it and replace filenames, paths, or keywords as needed.
npx http-server
Copy it and replace filenames, paths, or keywords as needed.
alias r='fc -s'
Copy it and replace filenames, paths, or keywords as needed.
history | awk '{print $2}' | sort | uniq -c | sort -nr | head
Uses pipes, overwrite, or deletion. Check paths and options first.
a() { case $1 in *.tar.gz) tar xzf $1;; *.zip) unzip $1;; esac; }; a file
Uses pipes, overwrite, or deletion. Check paths and options first.
truncate -s 10G file.img
Copy it and replace filenames, paths, or keywords as needed.
gs -dBATCH -dNOPAUSE -sDEVICE=pdfwrite -sOutputFile=out.pdf in1.pdf in2.pdf
Copy it and replace filenames, paths, or keywords as needed.
ffmpeg -i input.mp4 output.gif
Copy it and replace filenames, paths, or keywords as needed.
for f in *.txt; do mv "$f" "${f%.txt}.bak"; done
Uses pipes, overwrite, or deletion. Check paths and options first.
git status -sb
Copy it and replace filenames, paths, or keywords as needed.
while true; do echo -e "HTTP/1.1 200 OK\n\n$(date)" | nc -l 8080; done
Uses pipes, overwrite, or deletion. Check paths and options first.