After migration our site TecAdmin.net to new VPS (CentOS 6.5) on digital ocean hosting we found that Crontab is not installed on server, When I try to execute crontab -l command, I found following error. # crontab -l -bash: crontab: command not found After checking the package of crontab command in our older system,...
Openfire is a real time collaboration server. It uses XMPP protocol for instant messaging. This tutorial will help you to install and configure your won instant messaging server using Openfire and Spark. You can configure it to use in your LAN as well as over internet also. Step 1 – Prerequisites Before installing Openfire...
Git is a free and open source distributed version control system designed to handle everything from small to very large projects with speed and efficiency. Git is easy to learn and has a tiny footprint with lightning fast performance. It outclasses SCM tools like Subversion, CVS, Perforce, and ClearCase with features like cheap local...
Sudo is used for providing access to root (Super admin) commands to non-root users. For example, As an administrator, you want to provide access to restart the webserver to user nick, but he cannot make any changes to its configuration. You can provide sudo access to user nick to do it. To edit sudo...
RPM Stands for Redhat Package Manager. RPM command is used for managing rpm software packages in your linux machine. Using rpm command we can install, upgrade, remove, list packages. 1. Installing RPM in System. Use below command to install and vsftpd RPM in system. # rpm -ivh vsftpd-2.3.5-2.el6.i686.rpm Sample output: warning: vsftpd-2.3.5-2.el6.i686.rpm: Header V3...
Command named-checkconf checks the syntax only of a named ( bind ) configuration file. The file is parsed and checked for syntax errors, along with all files included by it. If there is no file is specified with the command, /etc/named.conf is read by default. 1. Check DNS (Bind) Configuration In case of any...
The DNS (Domain Name System) is a distributed system, used for translate domain names to IP address and vice a versa.For example when we type domain name in browser url like “https://tecadmin.net”, Our computer sends a request to DNS and get an ip address of domain. This article will help you to step by...
Fsniper is a useful tool for directory monitor, and execute predefined actions on files created or modified in that directory. For example, if we want to make a backup of each files created in your web upload folder or ftp directory, Using fsniper we can copy all files created in that folder to backup...
.htaccess stands for “hypertext access”. This is the default Apache directory level configuration file. .htaccess can be used to secure a particular directories in web server. One of the most common uses is to require user authentication in order to serve certain web pages. Create .htaccess File. First create a .htaccess file in your...
This tutorial will help you to under the Sticky bit, SUID and SGID file permissions under Linux system. What is Sticky Bit? The sticky bit is used to indicate special permissions for files and directories. If a directory with sticky bit enabled will restrict deletion of the file inside it. It can be removed...