base64 - encode and decode to base64
$ base64 [-d|--decode] [file]
base64
encodes or decodes to base64 the data in file file
or from stdin if file is not specified or file is -
.
-d|--decode
: Decode data# base64 encode the text 'foo'
$ echo 'A' | base64
# base64 encode the content of foo.txt
$ base64 hi.txt
# base64 decode the text 'Zm9v'
$ echo 'Zm9v' | base64 -d
# base64 decode the content of foo.txt
$ base64 -d foo.txt