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sudo mdutil -a -i off

Enable Spotlight
sudo mdutil -a -i on

md5sum on Snow Leopard

The MD5 hash (or checksum) functions as a compact digital fingerprint of a file.

You can check the md5 hash of a file with the md5 command
md5 test.txt

The output looks like this
MD5 (test.txt) = ab41fdba223f971be13b1845122353cb

Apache on Snow Leopard, "ulimit: open files: cannot modify limit: Invalid argument"

When I started apache on my Snow Leopard i got a weird exception

/usr/sbin/apachectl: line 82: ulimit: open files: cannot modify limit: Invalid argument


So I opened the script and found that there is something wrong with $ULIMIT_MAX_FILES

The error message says that 'cannot modify limit' so i changed its value to empty string

# ULIMIT_MAX_FILES="ulimit -S -n `ulimit -H -n`"
ULIMIT_MAX_FILES=""


Voila, it works, but deeper investigation need.

Command-line tools on Mac OS X, Snow Leopard

allmemory, fs_usage, fuser, latency, sar, sc_usage, spindump: Display various system usage statistics.

bless, disklabel, disktool, diskutil, drutil, fsck, hdiutil, pdisk: Create, identify, manage, and fix Mac OS X disks, file systems, and disk images.

ioreg, kextstat: Show device drivers and other kernel extensions in use.

mDNS, dns-sd: Test Bonjour service discovery with these diagnostic tools.

open: Invoke launch services on an arbitrary document or application as if doubleclicking it in the Finder.

pbcopy, pbpaste: Move data between stdin/stdout and the Mac OS X pasteboard.

say: Convert text to audio output or a file via Speech Synthesizer.

shasum: Compute or validate SHA message digests.

sips: Manipulate the format and color space of bitmap images (for example, rotate,

sw_vers, uname: Display Mac OS X version information.

syslog and logger: Send, view, and manage system log messages with these modern

xattr: List, display, set, and delete file system extended attributes

You can find more information on apple.com in this documentation.