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March 13, 2019: End-of-Life for All TLS-SNI-01 Validation Support

Let’s Encrypt allows subscribers to validate domain control using any one of a few different validation methods....

Netstat Cheatsheet

To view the total number of connections to a port, run the following command in ssh netstat -tuna |...

How to stop using TLS-SNI-01 with Certbot

Let’s Encrypt is removing support for domain validation with TLS-SNI-01. If you’re using Certbot and received an email titled “Action required: Let’s...

Hypervisor KVM

Have you ever wondered how a cloud works? It is the most fast-growing IT-trend which attracts billions...

How To Make Changes In resolv.conf Permanent in Ubuntu

When you change the DNS configuration using /etc/resolv.conf file, you must have noticed that the changes are not permanent. A reboot and...

How to Setup FTP with ProFTPD in Webmin

After installing Webmin on a VPS or Dedicated Server, you may be wondering how to add and...

How To Backup Mailbox Daily, Weekly and Monthly

For backup mailbox, i am usually using zmmailbox command who has been provided by Zimbra. The command...

Installing PHP 7 on CentOS 6

Installing PHP 7 on CentOS 6 1. To install latest PHP 7, you need to...

How To Find Folder or File Older Than x Days and Move Them To Other Directory or Path

– Create folder /var/www/old_www-7days/ as destination path – Run find and move (in this case older than 7 days) to old_www-7days

How to Install JAVA 8 on Ubuntu 18.04/16.04 using PPA

There are two standard types of installation available are JDK and JRE. JDK (Java Development Kit) provides...

Enable Nginx Status Page

Nginx status page can give realtime data about Nginx’s health. It can help you tweak few Nginx config. Status data can be...

How to install and use snmpwalk

Snmpwalk is a great tool for Linux boxes. You can easily list all OIDs an SNMP host has to offer then filter...
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Proxmox 5x “e1000 driver hang” fix

Problem: I started to experience proxmox servers going up and down, an intermittent response on the network (SSH),...

How To Fix “Device eth0 does not seem to be present, delaying initialization” Error on Centos

check network: # ifconfig lo        Link encap:Local Loopback           inet addr:127.0.0.1  Mask:255.0.0.0           inet6 addr: ::1/128 Scope:Host           UP...

Create Blocking Bad Bots Through Apache in WHM/cPanel

we see a lot of traffic from 'bad robots', these bots cause problems such as high server load, server instability and can...

Tools for load-testing HTTP servers

Knowing how much traffic your web server can handle when under stress is essential for planning future grow of your website or...