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Linux
How to Install Zimbra Mail Server on CentOS 7
Zimbra Collaboration Suite (ZCS) is a collaborative software suite that includes a mail & chat server with a web client. Zimbra is developed and maintained by Synacor. Zimbra is available in two editions one as Zimbra Network Edition…
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How to Install ClamAV on CentOS 7
ClamAV is an open source antivirus tool. Its basic usage is for detecting viruses, malware, and malicious software on Linux-based machines. The threat from viruses, Trojans, and other forms of malware is real. They have grown exponentially…
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How to Install Kubernetes on Ubuntu 18?
Kubernetes is an open-source container orchestration tool developed by Google. In this article, you will learn how to set up Kubernetes with a master node and a worker node. Make sure you have Docker installed on both master and worker…
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Understand the Basics of Linux terminal commands
About 90% of the Internet is powered by Linux servers. If you want to manage or deploy applications on these Linux servers, such as a virtual private server (VPS), you need to have a decent understanding of Linux command line basics. But,…
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Understanding Linux File Permissions – 755 and rwxr-xr-x
Understanding Linux permissions might seem like a near-impossible task—what does 755 or u=rwx,g=rw,o=r mean, anyway?—but it’s actually easier than you think. Let’s take a look. Linux is a multi-user operating system that can be accessed…
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15+ cp Commands for Linux Beginners
Being a Linux user, copying files and directories is one of the most common day to day operations task.cp command is used to copy the files and directories from one local place to another using command line. cp command is available in…
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Introduction To Shell Scripting
A shell is an interpreter in UNIX like Operating system. It takes commands typed by the user and calls the operating system to run those commands. In simple terms a shell acts as form of wrapper around the OS. An Operating is made of…
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How to get started with Firewalld in RHEL7
Firewalld is the new userland interface in RHEL 7. It replaces the iptables interface and connects to the netfilter kernel code. It mainly improves the security rules management by allowing configuration changes without stopping the current…
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How to disable Firewalld and use Iptables instead.
If you don’t get used to Firewalld, you can still rely on Iptables by following the instructions below provided by the Fedora project. Procedure Install the Iptables package: # yum install -y iptables-services Disable the Firewalld …
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How To Migrate from FirewallD to Iptables on CentOS 7
Like most other Linux distributions, CentOS 7 uses the netfilter framework inside the Linux kernel in order to access packets that flow through the network stack. This provides the necessary interface to inspect and manipulate packets in…
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