Limiting CPU Usages in Linux using cpulimit

You might have already know how to check the CPU usages of any process. However, worried about any process consuming too much CPU? You should know, you can control the CPU usages of any process by CPU limiter. cpulimit is a free software to limit the CPU of any process. Here is the excepts from [...]

Delivery to the following recipient failed permanently, Verification failed

Today, I was getting the following error while trying to send email to any account of the server. The mail bounced with the following error messages.
This is an automatically generated Delivery Status Notification
Delivery to the following recipient failed permanently:
test@mydomain.com
Technical details of permanent failure:
Google tried to deliver your message, but it was rejected by the [...]

Effective Solutions for 500 error (Premature End of Script Headers)

There may a number of reasons and solutions for it. We listed a few here for your conveniences.

File/Directory Permission

error: directory is writable by others: (/home/user/public_html/)
This could be easily fixed by just changing the permissions of the file/directory in question. You can change the permissions by using the File Manager within cPanel, or an FTP [...]

Installing Suhosin by Patching PHP Source

Preparation
When you want to install PHP with the Suhosin-Patch you have to first perform some preparation steps.

Step 1: Installing the Hardened-PHP Project Signaturekey
You should first grab a copy of the Hardened-PHP Project’s Release Signaturekey and import it into your GNU Privacy Guard keychain. (For further information on the usage of gnupg please consult it’s [...]

Installing Suhosin as PHP Extension in Linux

Unlike the Hardening-Patch for PHP, nearly all of Suhosin´s features are within the extension. Therefore you might want to only install the extension and use a plain unpatched PHP. Depending on the system we might already offer binary packages. You can check our Suhosin Downloads page. In that case you only need to activate the [...]

Secure your Linux Servers

Securing a linux server is a continuous job as new types of exploits are discovered almost everday. Here, we tried to collect a number of quick guides that will help you securing your linux box.However, this guide covers only basic linux server security tips intended for linux learners. I am writing this [...]

Installing and configuring monit to monitor your server(s)

Monit is a utility for managing and monitoring, processes, files, directories and filesystems on a UNIX system. Monit conducts automatic maintenance and repair and can execute meaningful causal actions in error situations.
Pre Install Step:
yum install openssl*

Step 1: Installing monit from Source
cd /usr/local/src
wget http://mmonit.com/monit/dist/monit-5.0.3.tar.gz
tar -zxvf monit-5.0.3.tar.gz
cd monit-5.0.3
./configure –sysconfdir=/etc/monit/
make && make install

Step [...]

Hardening/Securing SSHD (Secure SHell Daemon)

A quick guide on how to secure your sshd. Hope it helps.
Step 1: First of all we need to make a regular user, since we are disabling direct root login:
adduser admin && passwd admin

Step 2: Backup your current sshd_config
mv /etc/ssh/sshd_config /etc/ssh/sshd_config.bak

Step 3: Create a new sshd_config file

DNS Records Types

The list below covers all of the supported types, and explains what they are used for.
* Address (A) An Address records associates an IP address with a hostname. Any system that you want to be able to connect to via HTTP, telnet or some other protocol using its hostname must [...]

Adding/Editing Zone Records using Webmin

Adding and editing records
The most useful feature of the BIND DNS Server module is the ability to add, edit and delete records in the master zones hosted by your server. For example, if you wanted to set up a webserver in your domain example.com, you would need to add an Address record for www.example.com with [...]

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