This post just saved me a hours of work, thanks 
http://www.d-man.org/news/2009/01/06/91/
It outlines how to remove an old version of ruby and install the version you need.
OTRS is an Open source Support Ticket System, its fairly easy to setup and has the ability to receive emails and add them automatically as tickets.
Personally I like its flexibility and they have just released OTRS 2.4.1 (Aitutaki – One Foot Island, Cook Island) which improves alot of its flexibilty.
It has great documentation at http://doc.otrs.org/2.4/en/html/
I have version 2.3.4 installed and I want to upgrade it to the latest version OTRS 2.4.1.
Download the rpm
wget http://ftp.otrs.org/pub/otrs/RPMS/fedora/4/otrs-2.4.1-01.noarch.rpm
Change the permissions.
chmod 777 otrs-2.4.1-01.noarch.rpm
Run the rpm upgrade.
rpm -Uvh otrs-2.4.1-01.noarch.rpm
Upgrade the database Part 1
MySQL
cat /opt/otrs/scripts/DBUpdate-to-2.4.mysql.sql | mysql -p -f -u root otrs
PostgreSQL
cat /opt/otrs/scripts/DBUpdate-to-2.4.postgresql.sql | psql otrs
Run the migration script as OTRS user.
su otrs /opt/otrs/scripts/DBUpdate-to-2.4.pl
I got this error and ignoreed it.
Message: Need Type! Traceback (10973): Module: Kernel::System::NotificationEvent::NotificationAdd (v1.2) Module: main::MigrateCustomerNotification (v1.6) Line: 218 Module: /opt/otrs/scripts/DBUpdate-to-2.4.pl (v1.6) Line: 99
Update the database Part 2
MySQL
cat /opt/otrs/scripts/DBUpdate-to-2.4-post.mysql.sql | mysql -p -f -u root otrs
PostgreSQL
cat /opt/otrs/scripts/DBUpdate-to-2.4-post.postgresql.sql | psql otrs
Restart httpd and mysqld
service httpd restart service mysqld restart
Restart otrs service
service otrs restart
Goto your otrs installation http://localhost/otrs/index.pl
If you get the error
Could not find the Linux kernel header files – the directories
/lib/modules/2.6.18-128.el5/build/include and /usr/src/linux/include
do not exist.
Then you need to install the following packages.
yum install kernel sources
yum install kernel-devel
yum install gcc
Create the following link
ln -s /usr/src/kernels/2.6.18-92.1.18.el5-i686 /usr/src/linux
And now you should be able to run.
sh VBoxLinuxAdditions-x86.run
Source of this tip – http://forums.virtualbox.org/viewtopic.php?f=6&t=16721
When copying a folder in centos, it interactively asks if you want to overwrite a file, the -f flag does not work. Simple solution, use \cp.
NoMachine developed NX technology to handle remote X window sessions and to make a remote graphical display usable over lower connection speeds.
Google released a open source NX server called Neatx, looks pretty interesting, see it at – http://code.google.com/p/neatx/
Great news, they have released version 1.0 of VLC finally. In my opinion VLC is the best media player out there, it works! Get it here – http://www.videolan.org/vlc/
find / -type f -size +20000k -exec ls -lh {} \; | awk ‘{ print $9 “: ” $5 }’
or
find / -type f -size +20000k -exec ls -lh {} \; | awk ‘{ print $9 “: ” $5 }’ > filelist.txt
To put the results in a text file.
Found here, a good resource for command line stuff – http://snippets.dzone.com/posts/show/1491
Install Ruby on Rails – Use http://www.how-to-linux.com/2008/12/how-to-install-ruby-on-rails-on-centos-52/
Create a database for Tracks
mysql -u root -p
create database tracks;
exit
Download Tracks from http://bsag.bingodisk.com/public/files/tracks-current.zip
Unzip the Tracks archive
unzip tracks-current.zip
Put tracks into /opt
mv tracks-1.7 /opt
Edit /opt/tracks-1.7/config/database.yml
vi /opt/tracks-1.7/config/database.yml
Add you mysql server details
production:
adapter: mysql
database: tracks
hosts: localhost
username: root
password: neveruserrootpassword
Change a config in site.yml
vi /opt/tracks-1.7/config/site.yml
Add something unique in the salt parameter.
Add the Tracks data to the database
rake db:migrate RAILS_ENV=production
If you get this error;
no such file to load — mysql
Download ruby-mysql – http://rubyforge.org/frs/?group_id=4550
tar mysql-ruby-2.7.tar.gz
cd mysql-ruby-2.7
ruby extconf.rb –with-mysql-config
make
make install
Now run the server
script/server -e production
Goto http://localhost:3000
VLC media player is the best video player, it just about runs any type of media. They have just released an update.
VLC media player is a highly portable multimedia player for various audio and video formats (MPEG-1, MPEG-2, MPEG-4, DivX, mp3, ogg, …) as well as DVDs, VCDs, and various streaming protocols. It can also be used as a server to server in unicast or multicast in IPv4 or IPv6on a high-bandwidth network.
Download it at - http://www.videolan.org/vlc/
Yum on one of my centos boxes simply would not work. Once you entered a yum command such as;
yum clean all
yum upgrade
it hung and would not work.
Apparently I needed to remove the __db.* in /var/lib/rpm
rm -f /var/lib/rpm/__db.*
See this link for more info - http://www.serpentine.com/blog/2007/01/04/dealing-with-yum-hangs-on-fc6/
