# find . -name blaat.txt

./blaat.txt

# find /home -name blaat.txt

/home/blaat.txt

# find /home -iname blaat.txt

./blaat.txt
./Blaat.txt

# find / -type d -name blaat

/blaat

# find . -type f -name blaat.php

./blaat.php

# find . -type f -name "*.php"

./blaat.php
./login.php
./index.php

# find . -type f -name "*.txt" -exec rm -f {} \;

OR

# find . -type f -name "*.mp3" -exec rm -f {} \;

# find / -mtime 50

# find / -atime 50