SquidGuard is a URL redirector used to use blacklists with the proxysoftware Squid. There are two big advantages to squidguard: it is fast and it is free.
chflag
http://www.macosxhints.com/article.php?story=20031017061722471
arch
- "archived flag"opaque
- "opaque flag"nodump
- "nodump flag"sappnd
- "system append-only flag"schg
- "system immutable flag"uappnd
- "user append-only flag"uchg
- "user immutable flag"
Lock a file from being moved, renamed or deleted:
chflags uchg filename
Undo it with:
chflags nouchg filename
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