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Syslog-ng

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This website http://www.campin.net/syslog-ng/faq.html has amble information on syslog-ng. It also collected a goodly number of links on various log processing information:

CentOS SSH X11 Forwarding

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To setup SSH X11 forwarding on CentOS, we need to:

1. On the remove server, edit /etc/ssh/sshd_config, and set the following values:

X11Forwarding yes
X11DisplayOffset 10
X11UseLocalhost yes

2. On the remove server, install the package xorg-x11-xauth:

Convert PDF to JPEG on Linux

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There is a small tool called Imagemagick that helps to convert PDF file into JPEG. Just install it:

# aptitude update
# aptitude install imagemagick

Then run the command "convert":

$ convert abc.pdf abc.jpg

That's it. Very simple.

 

Multi-Langauge in Drupal 6

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Here are some modules, posts and discussion on how to do multiple languages in Drupal 6:

Zimbra Ports

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Here are some posts related to Zimbra mail server's ports and configuration:

Install Zimbra on OpenVZ CentOS

Prepare the VPS

Before we install Zimbra, we must install the follow packages

root@HN# vzctl exec 101 yum install ant sysstat gmp compat-libstdc++-296 compat-libstdc++-33

The above list should be good enough for Zimbra 6. If installing Zimbra 5, then we also have to have:

Virtual Users And Domains With Postfix, Courier And MySQL

The following are a serie on "Virtual Users And Domains With Postfix, Courier And MySQL (CentOS 5.1)" in howtoforge:

/dev/sda1 does not have any corresponding BIOS drive

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After a grub update, we were instrusted to do install the new version's stage1 to MBR. A first attempt failed as follow:

# grub-install hd0
/dev/sda1 does not have any corresponding BIOS drive.

(hd0 was the boot disk for this system. You can find out yours from your grub.conf file.) To fix this problem, we just needed to add the "--recheck" option:

Newer Software Versions in CentOS

The general, the software version in CentOS are behind. It's just the way CentOS and Red Hat operate. They aim for long term support and stability.

But if you have to use a newer software package, you may find the some newer packages in CentOS's test repository, as listed in this page Available Repositories for CentOS. For CentOS 5 testing packages, you can find them in http://dev.centos.org/centos/5/testing/.

Test DNS Blacklist

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There are a number of tools out there that helps you to test if a domain has been blacklisted. There is a good one:

http://www.blacklistalert.org/

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