🖥️ Terminal Cheat Sheet

pwd

ls              # basic
ls -la          # all files + details
ls -lhS         # sort by size
ls -lt          # sort by modified time

cd /path/to/dir
cd ~            # home
cd ..           # parent
cd -            # previous dir
cd ~/Desktop

open .          # open current dir in Finder
open ~/Desktop

touch file.txt
mkdir my-folder
mkdir -p parent/child/grandchild    # create nested

cp file.txt copy.txt
cp -r folder/ destination/    # recursive (folder)

mv file.txt newname.txt
mv file.txt ~/Documents/

rm file.txt
rm -r folder/          # recursive
rm -rf folder/         # force (no prompts) ⚠️

du -sh folder/         # folder size
du -sh *               # all in current dir
df -h                  # disk usage

ln -s /path/to/real /path/to/link

find . -name "*.dart"                  # by name
find . -type f -name "*.json"          # files only
find . -mtime -1                       # modified last 24h
find . -size +1M                       # larger than 1MB

cat file.txt
less file.txt       # scroll with arrows, q to quit
head -20 file.txt   # first 20 lines
tail -20 file.txt   # last 20 lines
tail -f log.txt     # follow live log

grep "pattern" file.txt
grep -r "pattern" ./          # recursive
grep -i "pattern" file.txt    # case-insensitive
grep -n "pattern" file.txt    # with line numbers
grep -l "pattern" ./*.dart    # only file names

wc -l file.txt    # lines
wc -w file.txt    # words

sort file.txt
sort -r file.txt      # reverse
sort | uniq           # remove duplicates
sort | uniq -c        # count occurrences

chmod 755 script.sh      # rwxr-xr-x
chmod +x script.sh       # add execute
chmod -w file.txt        # remove write
chmod -R 755 folder/     # recursive

777  # rwxrwxrwx — full access (avoid!)
755  # rwxr-xr-x — scripts, dirs
644  # rw-r--r-- — files
600  # rw------- — private keys

sudo chown user:group file.txt
sudo chown -R user:group folder/

sudo command
sudo !!       # re-run last command as sudo

ps aux                        # all processes
ps aux | grep flutter         # filter
top                           # live process monitor
htop                          # better top (brew install htop)

kill PID              # graceful
kill -9 PID           # force kill
killall Xcode         # by name
pkill -f "flutter"    # by pattern

command &      # run in background
jobs           # list background jobs
fg %1          # bring job 1 to foreground
Ctrl+Z         # pause current process
Ctrl+C         # stop current process

lsof -i :8080             # who uses port 8080
lsof -i :8080 | grep LISTEN

ping google.com
ping -c 4 google.com    # 4 times
nslookup google.com
dig google.com

curl https://api.example.com
curl -X POST https://api.example.com/data \
  -H "Content-Type: application/json" \
  -d '{"key": "value"}'
curl -o file.txt https://example.com/file

ifconfig          # network interfaces
ifconfig en0      # Wi-Fi info (IP address)
netstat -an       # active connections

ssh user@host
ssh -i ~/.ssh/id_rsa user@host    # with key
ssh-keygen -t ed25519 -C "email"  # generate key
cat ~/.ssh/id_ed25519.pub         # show public key

nano file.txt
nano ~/.zshrc

Ctrl+O      # Save (WriteOut)
Enter       # Confirm filename
Ctrl+X      # Exit
Ctrl+K      # Cut line
Ctrl+U      # Paste line
Ctrl+W      # Search
Ctrl+\      # Search & replace
Ctrl+G      # Help
Ctrl+A      # Go to start of line
Ctrl+E      # Go to end of line
Ctrl+_      # Go to line number

vim file.txt

i         # Insert mode (start typing)
Esc       # Back to Normal mode

:w        # Save
:q        # Quit
:wq       # Save & quit
:q!       # Force quit without saving

dd        # Delete line
yy        # Copy line
p         # Paste below
/pattern  # Search (n = next, N = prev)
:%s/old/new/g   # Replace all

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

brew install package       # install
brew uninstall package     # remove
brew update                # update Homebrew
brew upgrade               # upgrade all
brew list                  # installed packages
brew search name           # search
brew info package          # package details
brew doctor                # diagnose issues

brew install --cask visual-studio-code
brew install --cask android-studio
brew install --cask iterm2

Ctrl+C      # cancel current command
Ctrl+D      # exit / EOF
Ctrl+L      # clear screen
Ctrl+A      # move cursor to start of line
Ctrl+E      # move cursor to end of line
Ctrl+U      # clear from cursor to start
Ctrl+K      # clear from cursor to end
Ctrl+W      # delete word before cursor
Ctrl+R      # reverse search history
!!          # repeat last command
!$          # last argument of previous command
Tab         # autocomplete

history             # list command history
history | grep git  # search history
!123                # run command #123

sh -c "$(curl -fsSL https://raw.github.com/ohmyzsh/ohmyzsh/master/tools/install.sh)"

nano ~/.zshrc
source ~/.zshrc    # reload config

alias gs="git status"
alias gp="git push"
alias fl="flutter"
alias fpr="flutter pub run"

export PATH="$PATH:/path/to/flutter/bin"
export PATH="$PATH:$HOME/.pub-cache/bin"

export MY_VAR="value"
echo $MY_VAR
printenv    # print all env vars