... unix¹

unix implies Unix, POSIX, AIX, HP/UX, NeXT STEP, Mac on Mach (whatever it's called). Oh! And Linux.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

... element.²

To be honest, I don't have a need for print-log's XML output, so I haven't even tested it.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

...Unix³

...and unix-like systems, which includes POSIX, HP/UX, AIX, Minix, Ultrix, Dynix, A/UX, NeXT STEP, BSD, & yes, Linux.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

... line,⁴

This is your best source of information about any unix command line program.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.