redhat

  1. Bhawani Singh

    How to change Kloxo Control Panel default access port ?

    What is Kloxo ? Kloxo is a web hosting control panel for Red Hat and CentOS Linux Distributions which was formerly known as Lxadmin. Kloxo is open source and free too which makes it a very popular Web hosting control panel among server administrators. It is a very good alternative for cPanel web...
  2. Bhawani Singh

    How to change SSH port on CentOS Linux Server ?

    In need to secure your server you should avoid default port for SSH as it will increase the security level and decrease risk of vulnerability. We all know that default SSH port is 22, we should change it to something else but you should must take care before choosing a number that it is not in...
  3. Bhawani Singh

    How to check SMTP_BLOCK option in server firewall on CentOS Linux System ?

    SMTP_BLOCK option help to prevent spam email abuse on a CentOS Linux server that bypasses exim and sends spam emails out through port 25. By enabling this option on server you can bind the spammers to send out spam emails using socket connection from your server using any web scripts as it will...
  4. Bhawani Singh

    How to install Memcached on CentOS Linux server ?

    In this article we will learn how to install Memcached on CentOS linux server. But, first we will discuss what is Memcached and for what purpose it is used. What is Memcached ? Memcached is a open source distributed, high performance memory object caching program that is primarily used to...
  5. Bhawani Singh

    How to create a MySQL user on CentOS server and Grant permissions to it through command line ?

    To create MySQL user you should have root access for SSH. First of all you have to login to MySQL server through command line. ----- # mysql -u root -p ****** ----- Here, -u option is for username and -p option is for password. Now, you will be at MySQL prompt and it looks like this : ----- #...
  6. Bhawani Singh

    How to delete MySQL database through command line ?

    Sometimes we need to delete a MySQL database through command line. Before deleting a database you must check these points like you must have root access, before use DROP DATABASE you should check you have DROP privilages or not. First, we will login to the MySQL server through command line ...
  7. Bhawani Singh

    [RESOLVED] Error "Can’t connect to local MySQL server through socket ‘/var/lib/mysql/mysql.sock’ (2)

    This problem occurs when you run command "# mysql -u USER -p". It happens as MySQL is not running or installed on server. To rectify this we have first check whether MySQL is running or not. To check MySQL is Running or not type the following command: ---- # service mysqld status ---- You can...
  8. Bhawani Singh

    How to execute MySQL queries from command line/Bash shell ?

    Many a times we need to run MySQL query directly from command line to perform certain tasks like backup of MySQL database or creation of MySQL database and users, without logging into MySQL prompt. You can either run a single query quickly from command line Or you can run queries from Bash...
  9. Bhawani Singh

    How to setup DNS Resolution with "resolv.conf" file ?

    The "resolv.conf" is a file used to configure the system's Domain Name System (DNS) resolver which contains a list of nameservers IP addresses available for DNS resolution. It contains information which determines the operational parameters of the DNS Resolver. The DNS resolver translate the...
  10. Bhawani Singh

    Introduction to FirewallD CentOS 7. How to start and stop/disable it ?

    Introduction to FirewallD CentOS 7 : FirewallD is a complete firewall solution provided by default with CentOS 7. It control network traffic rules through IP tables and act as frontend controller. It is available with most Linux Distributions. The key features of FirewallD are that it uses zones...
  11. Bhawani Singh

    How to find php.ini location on CentOS server ?

    What is php.ini file ? The php.ini file is the default configuration file for running applications that require PHP. It is used to control variables such as upload sizes, file timeouts, and resource limits. How to find php.ini location ? You can check php.ini file through two ways. 1). Through...
  12. Bhawani Singh

    How to install CentOS Web Control Panel on CentOS system ?

    CentOS Web Panel is a free web hosting control panel which facilitates you to easily manage servers. The latest version of CentOS Web Panel 0.9.8.6 was released on 19th April 2015. This control panel is full with various features that provide an ease to manage and operate server operations...
  13. Bhawani Singh

    How to remove server signature from CentOS/RedHat Linux System

    Web Server signature is an information about the server and hosting operating system i.e. Apache version number and operating system info. By default configuration of Apache, any error page will show the full signature of the server (version number), that can be risky as it can be used by...
  14. Bhawani Singh

    How to empty mail queue on CentOS Linux system ?

    Due to spamming, spoofing and other malpractice email queue become loaded with thousand of unwanted emails. It will slow down your server performance and mainly affect your exim to deliver emails. It's not quite easy to sort out the genuine emails from these bulk spam mails as it is like finding...
  15. Bhawani Singh

    How to check service status on CentOS Linux Systems ?

    How to check service status in Linux system (CentOS) ? Whenever we are troubleshooting any issue on server, we have to check service status on server whether they are running or not like Mysql, Apache, SMTP, TCP etc. To find out status of a service in Linux CentOS system, you can use SERVICE...
  16. Bhawani Singh

    How to fix Nginx Error "413 Request Entity Too Large" ?

    Nginx Error 413 Request Entity Too Large : This error is a very common error in nginx, which normally comes when we requests more information than is limited by PHP and Nginx configurations. It occurs on stand alone nginx server, when nginx acts as a front end server for apache at back end...
  17. Bhawani Singh

    How to add/change a user to a group in Linux operating system ?

    Changing the group of a user is quite easy and simple task, but it is not known to every user. In this topic we will tell you the commands through which not only you can add new user to a group but also change existing user's group too. The basic commands used are "useradd" and "usermod"...
  18. Bhawani Singh

    How to mount USB in Linux CentOS server ?

    In today's world mostly people use USB flash memories for data transfer and storage. CD's and floppies are almost past now. USB Flash memories are compact and store more data with respect to CD's and Floppies. New Linux users find it difficult to use USB devices in Linux systems. The real...
  19. Bhawani Singh

    Error "unable to establish a php session" in cPanel PhpMyAdmin.

    Have you ever faced this error while accessing PhpMyAdmin in cPanlel ? "Access Denied Unable to establish a PHP session. If you believe that this is in error or inadvertent, contact your system administrator and ask them to review your server settings." Well, we have the solution for this error...
  20. Bhawani Singh

    How to check performance of linux system through command line ?

    To monitor and debug a Linux system performance is really a tough job for a system administrator in Linux. It's not quite easy for experts also to monitor and keep system up and running, But, there are many utilities through which monitoring your system becomes easy and reliable too. There are...
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