Usage of Bash command find

find_usage.sh

# Find filename with gcc under folder /usr
find /usr -name gcc

# Find directory based on filename gcc under folder /usr
find /usr -type d -name gcc

# Find file which modified today under current directory
find -type f -mtime 0

# Find file which filesize is zero
find -type f -size 0

# Find filename with pattern a.* and echo them out
# `{}`
# a place holder that will be filled with all the file names that result from the find expression,
# and the preceding command will be run on each one individually.
find . -name 'a.*' -exec echo {} ';'

# For example,
#
# $> find . -name 'a.*' -exec echo {} ';'
# ./a.py
# ./a.txt