Comments on: 9 Command Line Tricks for Mac OS X You Should Know

By: jch

jch — Fri, 14 Dec 2012 21:05:14 +0000

From the purge man page:

“Purge can be used to approximate initial boot conditions with a cold disk buffer cache for performance analysis. It does not affect anonymous memory that has been allocated through malloc, vm_allocate, etc.”

The first thing that happens when you flush the buffer cache is that all the files that were in use and in the buffer cache and being used by applications have to be read in again. Releasing inactive memory doesn’t help machine performance at all, it actually makes it worse. In some cases, especially on a server of any kind, much, much worse.

By: ag2web

ag2web — Sat, 08 Dec 2012 21:22:20 +0000

Or use XLine instead of terminal for some commands:
http://www.cycliccode.com/XLine/index.html

By: Dino Trudel

Dino Trudel — Fri, 07 Dec 2012 02:15:32 +0000

Just a funny observation, your first screenshot for this post with the echo command shows that the echo doesn’t echo the real thing, it introduces a typo in “should”

By: Daniel

Daniel — Thu, 06 Dec 2012 21:12:39 +0000

Just press CTRL + ‘C’. It terminates the current process from the terminal.

By: Will

Will — Thu, 06 Dec 2012 16:34:15 +0000

Interesting, didn’t even notice that, and didn’t photoshop the image either! It’s ksh, inexplicable…

By: NoName

NoName — Thu, 06 Dec 2012 15:56:54 +0000

A little tip:
You can enable notifications in notifications center for crashed apps:
You need:
- CrashReporterPreferences from Xcode Auxiliary Tools
Open CrashReporterPrefs and enable the “Use Notification Center” checkbox.
There you can also enable two other modes for crash notifications.

NoName

By: Dirk-Jan

Dirk-Jan — Thu, 06 Dec 2012 12:11:56 +0000

Great tips, but you why did you photoshop the image above the article?
An echo of “should” does not result in “shoudld”

(If you didn’t want your username@server to show, just type `PS1=’$ ‘` in the terminal first)

By: Aberto I

Aberto I — Thu, 06 Dec 2012 10:13:58 +0000

how to stop caffeinate command?

By: hipciu

hipciu — Thu, 06 Dec 2012 07:36:02 +0000

Thanks!

By: Greg Pennefather

Greg Pennefather — Thu, 06 Dec 2012 07:28:17 +0000

As always, a great tip. I checked out the download database and thought it empty too. But it seems that it stores every file downloaded as an email attachment too and these show up blank using this query because the selected field is blank i those entries. If you change the query to sqlite3 ~/Library/Preferences/com.apple.LaunchServices.QuarantineEventsV* ‘select LSQuarantineDataURLString from LSQuarantineEvent where LSQuarantineAgentName is “Safari”‘
You will see only the files downloaded by Safari

By: Linus

Linus — Wed, 05 Dec 2012 23:19:27 +0000

My personal favourite is kind of the opposite of caffeinate;

sudo shutdown -h +45

Perfect to use for not having to get out of bed to turn of the computer after watching that last episode before lights out.

By: Will

Will — Wed, 05 Dec 2012 21:51:56 +0000

This is what you are looking for:

http://osxdaily.com/2012/02/10/run-macbook-with-lid-closed-without-sleep-nosleep/

By: hipciu

hipciu — Wed, 05 Dec 2012 21:37:12 +0000

Is there a way to make caffeinate works when my MacBook is closed? I mean, it works fine but the moment I close my laptop, the OS goes to sleep.

By: Wonder

Wonder — Wed, 05 Dec 2012 21:16:21 +0000

Great list! I think the sql database of files downloaded is no longer stored though, at least in OS X 10.8.2 mine returns nothing?