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Changing hostname and IP on a CentOS server
Written by wiredgorilla   
Friday, 12 September 2008

OK, so you are ready to move your server to a different datacenter with a different IP C class.

Here are a few things you need to change

Last Updated ( Friday, 30 January 2009 )
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CentOS - what happened to netconfig in 5.1
Written by wiredgorilla   
Wednesday, 10 September 2008

For whatever reason CentOS decided to drop netconfig and renamed it to

system-config-network

 

 
How to Reset your Linux Root Password
Written by wiredgorilla   
Thursday, 21 February 2008
Whenever you can't remember Root password, you can read this tutorial and do step by step to Reset it ...
Last Updated ( Thursday, 21 February 2008 )
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The old JavaScript cPanel Server exploit
Written by wiredgorilla   
Tuesday, 12 February 2008

The Javascript exploit has been an old saga on a few Linux distros running cPanel and Plesk .

The compromise is at the root level and a rootkit has been installed. This rootkit will attach to several syscalls within the kernel and begin serving malicious javascript to random web visitors.

This root compromise is not related to cPanel directly, as it has been reported on many different control panels on many different servers. The compromise is at the system level, and only Redhat 4, CentOS 4, and FC6 appear to be vulnerable at this time. We are actively researching this issue and will have an in-depth analysis of current information posted soon.

 

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DDOS check via number of connections
Written by wiredgorilla   
Tuesday, 12 February 2008

A quick and usefull command for checking if a server is under ddos is

That will list the IPs taking the most amount of connections to a server. It is important to remember that the ddos is becoming more sophistcated and they are using fewer connections with more attacking ips. If this is the case you will still get low number of connections even while you are under a DDOS.

Last Updated ( Sunday, 02 March 2008 )
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PRM (Process Resource Monitoring) in Linux Servers
Written by wiredgorilla   
Monday, 11 February 2008

The great people from R-FX Networks are bringing us a number of powerfull tools for the Linux Server enviroment

PRM (Process Resource Monitoring) monitors the process table on a given system and matches process id's with set resource limits in the config file or per-process based rules. Process id's that match or exceed the set limits are logged and killed; includes e-mail alerts, kernel logging routine and more...

Last Updated ( Tuesday, 12 February 2008 )
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Moving large files from one linux server to your new linux server
Written by wiredgorilla   
Thursday, 07 February 2008

Ok, so you like to move your 3 gig backup from your old server to your new server, but the the good old wget command is not doing the trick?

There is an easy way around with the scp command 

 

Last Updated ( Sunday, 22 June 2008 )
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CentOS 5.1 Server Setup: LAMP, Email, DNS, FTP, ISPConfig (a.k.a. The Perfect Server)
Written by wiredgorilla   
Tuesday, 29 January 2008

This tutorial shows how to set up a CentOS 5.1 based server that offers all services needed by ISPs and web hosters: Apache web server (SSL-capable), Postfix mail server with SMTP-AUTH and TLS, BIND DNS server, Proftpd FTP server, MySQL server, Dovecot POP3/IMAP, Quota, Firewall, etc. This tutorial is written for the 32-bit version of CentOS 5.1, but should apply to the 64-bit version with very little modifications as well.

Last Updated ( Wednesday, 30 January 2008 )
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How to mount a new hard drive on your Linux Server
Sunday, 26 November 2006
This is a simple guide on how to mount and parition a new hard drive to be used only for backups.
This guide uses fdisk which is a very powerful tool but you should be fine as long as you are careful in what you do. Use this guide at your own risk!
What ever you do make sure to NOT use the command "fdisk /dev/sda" or "fdisk /dev/hda" as that means you are editing your main and boot partition!
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Adding an IP address to your Linux Server
Sunday, 26 November 2006
This is a quick guide on adding IPs to a system manually. I would only suggest it if you are not using a control panel, such as cpanel, that has a feature to adds ips. If your main ethernet device is eth1 instead of eth0 simply substitute eth1 for eth0. Other then that should be pretty simple to follow, this should work on any standard redhat/centos based system.
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