uuencode, uudecode - Encodes or decodes a binary file
uuencode [file] remotefile
Interfaces documented on this reference page conform to industry standards
Refer to the standards(5) reference page for more information about indus-
try standards and associated tags.
The uuencode and uudecode commands are used to send a binary file via uucp
or other mail. This combination can be used over indirect mail links even
when uusend is not available.
The uuencode command takes the named file (default standard input) and pro-
duces an encoded version on the standard output. The encoding uses only
printing ASCII characters, and includes the mode of the file and the name
for re-creation on the remote system, specified by remotefile.
The uudecode command reads an encoded file, strips off any leading and
trailing lines added by mailers, and recreates the original file with the
specified mode and name. Filter the encode through the uudecode program.
Filtering the file causes the original file to be automatically recreated.
This is possible on the uucp network by using sendmail or by making rmail
be a link to mailx. In each case, an alias must be created in a master file
to get the automatic invocation of uudecode.
If neither of the preceding facilities is available on a user's system,
uudecode can be applied to the file manually by editing the file with any
text editor, removing the trailing and leading lines, and changing the mode
or remote system name. The encoded file is an ordinary text file.
1. In the following example, the ex1 file is encoded; the output is also
redirected to the ex1.out file:
prompt>> uuencode ex1 ex1.en >> ex1.out
If the source ex1 file is as follows:
This example shows
how to encode
a file using
and how to
decode a file
The encoded ex1.out file would be as follows:
begin 644 ex1.en
2. In the following example, the ex1.out file is decoded:
prompt>> uudecode ex1.out
In this example, the uudecode command decodes the file and puts the
output in ex1.en.
3. To package up a source tree using tar, compress it, uuencode it, and
mail it to a user on another system, enter:
tar cf - src_tree | compress | uuencode src_tree.tar.Z
| mail sys1!sys2!user1
(Enter the command entirely on one line, not on two lines as shown
When uudecode is run on the target system, the src_tree.tar.Z file is
created; it may then be uncompressed and dearchived with tar.
Commands: ct(1), cu(1), mailx(1), Mail(1), rmail(1), sendmail(8), tip(1),
uucico(8), uucleanup(8), uucp(1), uulog(1), uuname(1), uupick(1),
uusched(8), uusend(1), uustat(1), uuto(1), uux(1)