Rasberry Pi 4 can't connect to WiFi ubuntu server [fixed]

 In this tutorial, How to connect to WiFi ubuntu server on Rasberry Pi  4. Today, I buy Rasberry PI 4 new and install ubuntu 20.04 LTS. root...

How to Upgrade php version on Centos 7

 In this tutorial, How to upgarde php version on Centos 7. My Server have installed php71. I will upgrade php to version php74 Type the fol...

How to resolve Error: rpmdb open failed In CentOS

In this tutorial, How to resolve Error: rpmdb open failed Error In CentOS. I was testing on nginx web server in Centos 7 VM Linode . Unfortu...

How to install aide centos

In this tutorial, How to install aide Centos. What does Aide mean AIDE is one of the most popular tools for monitoring the server chang...

After install setup Fedora 30

In this tutorial, Things to Do After Fresh Installation Fedora 30. Let do it! TO DO 1. Update your Fedora Always keep your system ...

Leverage browser caching for Nginx

In this tutorial, How to configure Leverage browser caching for nginx. What does Leverage browser caching mean? Page load times can be si...

New reverse proxy tool Modlishka

You can Bypass Two-Factor Authentication and Automate Phishing Attacks by New Reverse Proxy Tool call Modlishka. A Polish cybersecurity rese...

Vagrant up error while executing `VBoxManage`

This day, I running vagrant up in my laptop then isuse. I can not start VM in vagrant. My laptop use windows 10. Error code as below: $ v...

How to install 3proxy on centos 7

In this tutorial, How to install 3proxy on centos 7 ? How to configure 3proxy for multiple 3G USB modems. Pre-install The package for Centos...

How to install wvdial on ubuntu 18.04

In this tutorial, How to install wvdial on ubuntu 18.04. You want to install wvdial for USB 3G/4G Modem. Link download wvdial package for ub...

INSTALLING AND CONFIGURING USB 3G DATA ON CENTOS/RHEL

In this tutorial, How to installing and configuring USB 3G/4G Data on CENTOS /RHEL. INSTALLING AND CONFIGURING USB 3G DATA ON CENTOS/RHEL...

mount.nfs stale file handle Solve Problem

How to Solve Problem "mount.nfs stale file handle". Cause, your server reboot or another issue you can not input command terminal ...

How to Image compression faster web pages

Web developers want to fast loading web pages. How to optimize image for web site with PNGs image. I using Linux operating system. Che...

How to MySQL change user password

In this tutorial, How do i use MySQL change user password. MySQL and MariaDB are the popular open source Database for Linux Opearating Syste...

How to create a local yum repository for Centos/Redhat/Fedora

In this tutorial, How to create a local yum repository for Centos / Redhat / Fedora . Step 1: mount your ISO file Create folder path /mnt...

How to Install sublime text editor on Fedora with DNF

In this tutorial, How to Install sublime text editor on Fedora with DNF. Sublime Text is a powerful tool for web developer. I love it Inst...

Recover Data from Crashed Disks with ddrescue command

How to save and recover Data from Crashed Disks with ddrescue command? This is program is useful to rescue data in case I/O error. How to so...

How to using NGINX Multiple ssl certificates on one ip

I experienced setup and configure nginx multiple domain on one VPS. In this tutorial, How to using NGINX Multiple ssl certificates on one i...

How to setup OpenVPN Server on Centos 7

In this tutorial, I will setup OpenVPN Server on Centos 7.   Step 1: Prepare install OpenVPN server sudo yum update -y sudo yum insta...

Failed to create the VirtualBox COM object solve problem

Someday, your Virtualbox not start and the display error "Failed to create the VirtualBox COM object". it got somewhat corrupted...