TAR(1) OpenBSD Reference Manual TAR(1)
NAME
tar - tape archiver
SYNOPSIS
tar {crtux}[014578befHhjLmOoPpqsvwXZz]
[blocking-factor | archive | replstr] [-C directory] [-I file]
[file ...]
tar {-crtux} [-014578eHhjLmOoPpqvwXZz] [-b blocking-factor] [-C
directory] [-f archive] [-I file] [-s replstr] [file ...]
DESCRIPTION
The tar command creates, adds files to, or extracts files from an archive
file in ``tar'' format. A tar archive is often stored on a magnetic
tape, but can be stored equally well on a floppy, CD-ROM, or in a regular
disk file.
...
-j Compress archive using bzip2. The bzip2 utility must be in-
stalled separately.
...
已经支持bzip2了。