Try It Yourself - SyntaxStudy Editor

HTML / CSS / JS

# Display entire file
cat /etc/hosts

# Display with line numbers
cat -n /etc/os-release

# Paginate through a large file
less /var/log/syslog
# Inside less: /pattern  search | n  next | q  quit | G  end | g  start

# Show first 10 lines (default)
head /var/log/syslog

# Show first 20 lines
head -n 20 /var/log/syslog

# Show last 10 lines
tail /var/log/syslog

# Follow a log file in real time
tail -f /var/log/auth.log

# Follow and show last 50 lines
tail -n 50 -f /var/log/syslog

# Count lines, words, characters
wc /etc/passwd
wc -l /etc/passwd     # lines only

# Identify file type
file /bin/bash
# /bin/bash: ELF 64-bit LSB pie executable, x86-64 ...
file image.png
# image.png: PNG image data, 800 x 600, 8-bit/color RGB

# Detailed file metadata
stat /etc/hosts

# Edit with nano (beginner-friendly)
nano /tmp/test.txt
# Ctrl+O  save | Ctrl+X  exit

# Quick vim cheat-sheet (as comments)
# vim file.txt
# i       — enter insert mode
# Esc     — return to normal mode
# :w      — save
# :q      — quit
# :wq     — save and quit
# :q!     — quit without saving
# dd      — delete current line