Solved : Check without telnet if port is open on remote host – Linux

Earlier many system admins were using telnet to check if a port is open on remote machine. But, because of security concerns telnet is now not recommended to be installed on most linux boxes.

But hey we still need to check the remote port. This is part of normal troubleshooting in a linux admin’s life.

So, instead of using telnet you can use  nc.  netcat or nc is a  simple tool which is generally installed by default in linux distributions or you can install it with instructions below.

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Must have skills for DevOps Engineer and Free methods to learn them

Many people have asked us how to become a DevOps engineer so in this post we will show you the skills and technologies which can get you there.

Before we start we should know what is “DevOps”. As you can see the word is combination of “Developer” and “Operations”. So a DevOps engineer is suppose to be a bridge between the development and operations processes.

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Let’s see which skills do you need to become a DevOps engineer. In this post we will also discuss how you can acquire these skills for free. We have also mentioned some advanced paid courses which can help you acquire these skills quickly.

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Solved: Install Python 3 in Linux and set it as default

In this post we will show you how to install python 3 in a Linux box. We have Centos 7 installed in our server.

Check installed python version

Most of the Linux versions by default have python installed. So let’s check the current version.

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[ec2-user@cloudvedas ~]$ python --version
 Python 2.7.5
[ec2-user@cloudvedas ~]$

As we can see from the above output, currently we have Python 2 installed and we need Python 3 so let’s install it.

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Solved: Block spam in WordPress for free without plugin or coding

Hello!

In this post we will show you how you can manage the spam comments on your website without installing a plugin or tweaking the code.

All of us who manage a website or blog knows what a menace are spam comments. These spam can easily ruin the experience of your visitors and may also degrade your ranking in search engines.

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Solved: How to extend or grow a linux filesystem under LVM

In this post we will see how to grow a Linux filesystem without reboot.

  • Let’s check our current filesystem. We want to extend this filesystem by 200MB.
[root@cloudvedas CVFS1]# df -h /CVFS1
Filesystem                  Size Used Avail Use% Mounted on
/dev/mapper/cvsvg-cldvdsvol1 47M 12M    32M  26%   /CVFS1
[root@cloudvedas CVFS1]#
  • First check if we have free space in VG

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