`apropos` is not to find "forgotten (or unknown!) commands", but rather a manual page relating to a specific subject. On my machine, `tzconfig` doesn't have a manual page (it's nothing more than a shell script), so nothing will show up.

But why not use `locate` with a grep on bin? In this specific example (tzconfig), that helped me more than this perl snippet, since "/usr/sbin" is not in my $PATH.

$ locate tzconfig | grep bin
/usr/sbin/tzconfig
[download]

Or if you know you've recently used the command, `history` will guide you, and if you know the first n letters of your command, and the application is in your path, a double [Tab] will do just fine :)

# tz[Tab][Tab]
tzconfig tzselect
# tz
[download]

---

---

Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!

Titles consisting of a single word are discouraged, and in most cases are disallowed outright.

Read Where should I post X? if you're not absolutely sure you're posting in the right place.

Please read these before you post! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

Posts may use any of the Perl Monks Approved HTML tags:

a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr

You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)

	For:		Use:
	&		&
	<		&lt;
	>		&gt;
	[		&#91;
	]		&#93;

Link using PerlMonks shortcuts! What shortcuts can I use for linking?

See Writeup Formatting Tips and other pages linked from there for more info.