base64 encode/decode files or standard input and output
base64 encode or decode file or standard input to standard output;
base64 [OPTION]... [FILE]-d, --decode # Decode
-i, --ignore-garbage # Ignore non-alphabetic characters when decoding
-w, --wrap=COLS # Automatically wrap lines after the specified number of characters (default is 76), 0 disables automatic line wrapping
--help #Display this help description and exit
--version # Output version information and exitencoded string
printf foo|base64encoding file
base64 filedecoding
printf Zm9v|base64 -ddecode file
base64 -d file