The uuencode and uudecode utilities are used to transmit binary files over transmission mediums that do not support other than simple ASCII data. The b64encode utility is synonymous with uuencode with the -m flag specified. The b64decode utility is synonymous with uudecode with the -m flag specified.
The uuencode utility reads file (or by default the standard input) and writes an encoded version to the standard output, or output_file if one has been specified. The encoding uses only printing ASCII characters and includes the mode of the file and the operand name for use by uudecode.
The uudecode utility transforms uuencoded files (or by default, the standard input) into the original form. The resulting file is named either name or (depending on options passed to uudecode) output_file and will have the mode of the original file except that setuid and execute bits are not retained. The uudecode utility ignores any leading and trailing lines.
The following options are available for uuencode: