Currently viewing the category: "tips"

Report space remaining on disk on unix login

By On March 23, 2008 · Leave a Comment

I get a kick out of stuff like this. Add this to your .bash_profile to be greeted with the remaining space on your disk.

df -h | awk ‘NR==2 {print “Space available ” $4}’

This will actually change depending on which version of df you’re using (i think). I get different output on my Mac [...]

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Western Digital Drive with Leopard – “File system formatter failed.”

By On February 26, 2008 · 118 Comments

I just bought a 1TB Western Digital drive. I am stoked.

However, I tried to format the drive on my Mac (Leopard) and got the error “File system formatter failed” when I tried to format the disk as MacOS Extended (Journaled). Not cool.

I found this forum thread which suggested using multiple partitions to [...]

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Compiling Imagemagick on MacOS X – Not finding libjpeg

By On November 1, 2007 · Leave a Comment

I ran into an issue trying to get Imagemagick (convert) working on OSX last night. I had compiled libjpeg and installed it, but when I would compile convert, it would not have jpeg support.

I found this post on dzone, which I followed and was able to use libjpeg just fine.

tar zxvf jpegsrc.v6b.tar.gz

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PHP compile error on CentOS Install

By On July 15, 2007 · 6 Comments

I installed CentOS 5 on my VMWare a few days ago. I installed gcc via yum, compiled and installed libxml2. I then tried to install PHP 5.2.3 and received this error:

configure: error: installation or configuration problem: C++ compiler cannot create executables.

It took me forever to figure this out, but I had to install [...]

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Calculating the queries per second average in Mysql

By On May 30, 2007 · 1 Comment

I didn’t find any simple ways to determine how hard our mysql database was working, so I whipped this up. It uses a 10 second delay to figure out the queries per second average.

time=10
orig=`mysql -e “show status” | awk ‘{if ($1 == “Questions”) print $2}’`
sleep $time
last=`mysql [...]

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Helpful SVN Script For Adding all Unknown files to Repository

By On May 30, 2007 · 1 Comment

I use SVN from the command line a lot. I also hate typing things over and over. I wrote this script to add all files to a repository that are not already in there.

svn status | awk ‘{if ($1 == “?”) print $2 }’ | xargs svn add

I have [...]

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Public / private key set up but not working?

By On April 25, 2007 · 1 Comment

When you set up public key authentication, make sure your authorized_keys2 file has the permissions set to 600. If you don’t, it’s likely that you will still be prompted for your password.

chmod 600 authorized_keys*

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How to roll back commits to an earlier version of a repository in SVN

By On April 6, 2007 · 6 Comments

I’ve always wanted to know how to do this, and for some reason I always had a hard time finding out how. I needed to rollback a change I had committed to my SVN repository.

The way you rollback to an earlier version of your repository is to do a reverse merge.

Here’s the [...]

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10 (very) Basic Tips for PHP Web Application Security

By On February 23, 2007 · 1 Comment

Barebones list for the things you should be looking for when developing a web app in PHP. Some of it applies to all web apps, not just PHP.

Use HTML_Safe (or a similar javascript stripping library) to check for and remove javascript when you’re accepting data that will be output to a page. [...]

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Pretty URLs using Multiviews

By On October 12, 2006 · 11 Comments

I saw a post on digg.com about how it’s nice to have “pretty urls” that are easy to tell people. While i’m not sure anyone would remember rustyrazorblade.com slash some ridiculous post name, it’s nice to have for search engines. Unfortunately, it didn’t really go into detail about how to accomplish the urls. A lot [...]

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