Postfix is fast and popular SMTP server widely used. The main job of postfix is to relay mail locally or to the intended destination outside the network. Some of the most popular SMTP servers are Sendmail, Postfix, and Qmail. By default, Sendmail comes pre-installed with CentOS/RHEL 5. We will need to remove it and...
Links or Symbolic links are a special type of file that contains a reference to another file or directory. In simple world a single file or directory available at 2 or more locations. There are two types of symbolic links can be create 1- Soft Link and 2- Hard Link. Difference Between Soft Links...
Some times we required to secure a single url or few specific urls in our site, and all other site url keep remain with public access. This is very easy to manage with are using directory and file structure in sites. But some of framework like cakephp work on routing structure which is different...
Sometimes SQL Server logs files acquire a large space on disk. In that case, we need to reduce the size of the log file to claim some space. But truncating or reducing database log file in SQL Server 2008 can be quite difficult. It also has its own issues. This article contains a set...
Linux provides a number of tools for network configuration. Most important network settings for you Linux machine to access over network are IP configuration Device activation DNS configuration Default gateway 1. Default Network Configuration Files: Default linux interfaces configuration file exists in /etc/sysconfig/network-scripts/ named ifcfg-ethX ( ‘X’ is replace with number 0,1 or 2...
RPM (RedHat Package Manager) is a package management system for RHEL based systems. You may have seen that all the packages in Redhat based systems have extension .rpm. This tutorial will help you to how to create RPM for your own script I had created a script to take database backup, Today I have...
HAProxy Stats provides a lot of information about data transfer, total connection, server state etc. After installing HAProxy if you want to view HAProxy stats in your web browser, You can easily configure it by making few changes in your HAProxy configuration using following steps. Step 1: Enable Stats in HAProxy To enable stats...
Hi Guys, If you want to add a line in file at specific line number through script. Below examples will help you to do it. For example you have a file named file1.txt, file content are as below. [email protected]:~ # cat file1.txt tecadmin 1 tecadmin 2 tecadmin 4 Now you required to add text...
Being a system administration you have all responsibilies to maintain your systems. System admin is a person having good knowledge about operating systems and applications, as well as hardware and software troubleshooting. Many of reponsibilies vary from organization to organization. Basic responsibilities of system administrator’s typically include: 1. User account management. Creating new users...
Being a system administrator, we always need to keep our systems up to date with latest packages. Its difficult to go to server daily and check for available packages. For the same we can use yum-updatesd service to get email notifications to our mailbox or we can also configure this service to update any...