Trouble opening java applications in Leopard

I was having trouble executing applications that were developed in java the other day. Here goes a snippet of the error I was getting:

com.apple.launchd[191] ([0x0-0x1fdefdd].????[36322]) posix_spawnp("/Applications/.../Contents/MacOS/JavaApplicationStub", ...): Permission denied

You can easily fix the problem by giving Read, Write and Execute permissions to the user to the JavaApplicationStub executable file.
You do so by running the following command: chmod 777 /[your application path].app/Contents/MacOS/JavaApplicationStub .

Hope that helps.

Installing code repository subversion (SVN) on Linux Ubuntu

To install subversion, open a terminal and run the following command:

sudo apt-get install subversion libapache2-svn

We're going to create the subversion repository in /svn, although you should choose a location that has a good amount of space.

sudo svnadmin create /home/svn

Next we'll need to edit the configuration file for the subversion webdav module. You can use a different editor if you'd like.

sudo vim /etc/apache2/mods-enabled/dav_svn.conf

The Location element in the configuration file dictates the root directory where subversion will be accessible from, for instance: http://www.server.com/svn

(Don't forget to uncomment the Location closing tag at the end of the document)

The DAV line needs to be uncommented to enable the dav module

#Uncomment this to enable the repository
DAV svn

The SVNPath line should be set to the same place your created the repository with the svnadmin command.

#Set this to the path to your repository
SVNPath /home/svn

The next section will let you turn on authentication. This is just basic authentication, so don't consider it extremely secure. The password file will be located where the AuthUserFile setting sets it to

#Uncomment the following 3 lines to enable Basic Authentication
AuthType Basic
AuthName "Subversion Repository"
AuthUserFile /etc/apache2/dav_svn.passwd

To create a user on the repository use, the following command:

sudo htpasswd -cm /etc/apache2/dav_svn.passwd

Note that you should only use the -c option the FIRST time that you create a user. After that you will only want to use the -m option, which specifies MD5 encryption of the password, but doesn't recreate the file.

Restart apache by running the following command:

sudo /etc/init.d/apache2 restart

Now if you go in your browser to http://www.server.com/svn, you should see that the repository is enabled for anonymous read access, but commit access will require a username.

If you want to force all users to authenticate even for read access, add the following line right below the AuthUserFile line from above. Restart apache after changing this line.

Require valid-user

Now if you refresh your browser, you'll be prompted for your credentials.

Credit goes to Jason Meridith (http://www.lostechies.com/blogs/jason_meridth/)

How to update Ubuntu Server from command line

1. First you need to update /etc/apt/sources.list. Just open it up with your favorite editor
   sudo vi /etc/apt/sources.list
2. Since I was using 5.10, at the end of all the URL’s it should say ‘breezy’. You need to change all of these to ‘edgy’. Write the file out and quit.
3. Next, we need to update the source list by using the following command
   sudo apt-get update
4. To upgrade to the new distro, just enter dist-upgrade!
   sudo apt-get dist-upgrade
5. It will ask you if you want to update all of these packages, just say yes. Also, I had a few times that I had to hit ‘OK’ to confirm some postfix stuff. Since im not running any mail services, I dont need to set this up. Just keep an eye on the update since these messages delay the update.
6. You may have to force some installs/updates. If so (I had to do this), just enter
   sudo apt-get -f install
7. Once the upgrade is complete (it took mine forever since I was also downloading a trial game AND cygwin), restart your machine
   sudo shutdown -r now
8. Done!

Credits go to Jon (http://crazytrain.wordpress.com/)