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Author Archives: systemadmin

How To Install Nginx on Ubuntu 18
How To Install Nginx on Ubuntu 18   Installing Nginx Since Nginx is available in Ubuntu’s default repositories, it is possible to install it from these repositories using the apt packaging system....
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How to Configure Static IP Address on Ubuntu 18
How to Configure Static IP Address on Ubuntu 18 The newer versions of Ubuntu uses ‘Predictable Network Interface Names’ that, by default, start with en[letter][number]. The first step is to identify the name...
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How to Test Network Throughput with iPerf on Debian and Ubuntu
How to Test Network Throughput with iPerf on Debian and Ubuntu   Install iPerf The iperf package is included in most Linux distribution’s repositories.   Debian and Ubuntu apt-get install iperf  ...
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Started Service enabling compressing RAM with zRam – CentOS/RHEL 7 Installation hung
Started Service enabling compressing RAM with zRam – CentOS/RHEL 7 Installation hung When installing CentOS/RHEL 7 on a hardware box with huge amount of ram installed, the installation gets hung...
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How to add a second IP address, permanent or temporary in Linux
How to add a second IP address, permanent or temporary in Linux Add a second temporary IP address Using ifconfig If you want to add a secondary IP address to...
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Using ipset to block IP addresses – firewall
Using ipset to block IP addresses – firewall ipset is an excellent tool that can be used to efficiently block a list of IP addresses at the firewall level (it uses iptables).  It...
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How to Whitelist/Allow an IP address on CentOS, Redhat, Fedora Linux Server
How to Whitelist/Allow an IP address on CentOS, Redhat, Fedora Linux Server Steps to Allow incoming and outgoing connection in IPtables Firewall is given below.   How to Whitelist/Allow Incoming...
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How to use iptables
How to use iptables The user-space application program iptables allows configuring the tables provided by the Linux kernel firewall, as well as the chains and rules it stores. The kernel module currently...
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How to install java on CentOs.
How To Install Java On CentOs. First update all packages. Use these command: 2. Install OpenJDK package with these comand: 3. Install OpenJDK-devel package: 4. Check if the package is...
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How To Use grep Command In Linux
How To Use Grep Command In Linux Grep is an essential Linux and Unix command. It is used to search text and strings in a given file. In other words,...
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