find – search for files in directory hierarchy

$ find /home -name "*.txt"
$ find . -iname "readme*"    # Case-insensitive

$ find /var/log -type f      # Files only
$ find . -type d -name "test"  # Directories named "test"

$ find /home -size +100M     # Larger than 100MB
$ find . -size -1k           # Smaller than 1KB
$ find /tmp -size 0          # Empty files

$ find . -mtime -7           # Modified in last 7 days
$ find . -mtime +30          # Modified more than 30 days ago
$ find . -mmin -60           # Modified in last 60 minutes

$ find . -name "*.log" -exec rm {} \;
$ find . -type f -exec chmod 644 {} \;
$ find . -name "*.txt" -exec grep "error" {} +

$ find /tmp -type f -mtime +7 -delete
$ find . -name "*.tmp" -delete

$ find /var/www -perm 777    # Exactly 777
$ find . -perm -u+x          # User executable

$ find /home -user greys
$ find /var -group www-data

# AND (default)
$ find . -name "*.log" -size +1M

# OR
$ find . -name "*.jpg" -o -name "*.png"

# NOT
$ find . -type f ! -name "*.txt"

$ find . -maxdepth 1 -type f    # Current dir only
$ find . -maxdepth 2 -name "*.md"

$ find . -type f -empty
$ find . -type d -empty

$ find . -name "*.py" | wc -l

$ find . -mmin -30 -type f    # Last 30 minutes

$ find / -type f -size +500M 2>/dev/null

$ find . -name "*.log" -exec tar -rvf logs.tar {} \;

$ find . -type f -name "*.txt" | xargs -I{} basename {} | sort | uniq -d