Category Archives: Administration

Admin Panel Administration CDN EzPanel

Purging and Loading assets onto your CDN

Step 1: Login to the Webair EZPanel (https://ezpanel.webair.com) Step 2: On the left side menu, click on CDN.   Step 3: Click on the “Webair CDN” button. This will open up your Media Control Center to control all aspects of the Webair CDN.     Step 4: Select the “Purge/Load” option from the content platform you …

Administration CentOS Fedora FreeBSD Linux Tips and Tricks

Identify the process that is using some specific port

Sometimes, you may encounter a situation where you see some ports being used by some service, but you cannot exactly determine which application/service is using it. This article talks about how to identifying such services. FreeBSD In the case of FreeBSD, you can use “lsof” command to determine the service that is reserving port as below. lsof -i :199 …

Administration FreeBSD Linux Tips and Tricks

Some useful ‘find’ commands

The ‘find’ command is quite useful as it helps to identify files with specific permissions, users,groups, size, etc.  Also, it is quite helpful to as it allows to process its results when combined with other commands. This article talks about some useful ‘find’ commands. Find all files named ‘test.jpg’ inside /home directory             …

Administration Database MySQL

How to Display MySQL Storage Engines

How to Display MySQL Storage Engines From the MySQL command line, issue the following command: SHOW ENGINES; You should receive a result similar to:   Typically the default storage engine will be set to MyISAM. This storage engine normally provides the best combination of performance and functionality, although it lacks transaction capabilities and uses table-level …

Administration CentOS Debian Fedora Linux Tips and Tricks Ubuntu

How to Manage a Linux Server with systemd

What Operating Systems Have Adopted systemd? CentOS: Yes, by default since CentOS 7 Fedora: Yes, since the release of Fedora 15 RedHat: Yes Debian: Yes, shipped since Debian 7 as a technology preview Arch: Yes Ubuntu: Available Gentoo: Available OpenSUSE: Available Slackware: No   What About chkconfig and Other Legacy Commands? With systemd it is …

Administration CentOS Debian Fedora Linux Ubuntu

Assign range of IP addresses to an interface.

Sometimes you may need to assign a wide range of IP addresses to your network interface in Linux systems. Instead of manually creating aliases for the network interface, it is much quicker to use the network ip range instead. For example, you need to assign the IP range 192.168.10.6 – 192.168.10.100 to your eth0 interface. …

Administration Apache Security Tips and Tricks

Prevent hot linking of images.

Hot linking is displaying an image on a website by linking to the same image on another website, rather than saving a copy of it on the website on which the image will be shown. Lets say, you have an image at www.yourdomain.com/image.jpg and it is not well protected. If someone links this image to …

Administration FreeBSD Linux Tips and Tricks

Setting files as immutable.

Wouldn’t it be nice if we can set files so that even root cannot modify or delete it ? Both FreeBSD and Linux come with commands that allows us to set files as immutable. If you have files that you don’t want anyone to modify/delete by mistake, then these commands are quite useful.   FreeBSD …

Administration CentOS Fedora Linux

Disable SELinux

Security-Enhanced Linux (SELinux) is a mandatory access control (MAC) security mechanism implemented in the Linux kernel. This mechanism adds an extra layer of access security to your files,directories,devices, ports and even processes. I strongly recommend that you implement SELinux in your environment. But, in some cases, you may want to disable it to avoid some …