Jerry Zhao

How To Fix Error Job For [email protected]:1.service Failed Because The Control Process Exited With Error Code. See “systemctl Status [email protected]:1.service” And “journalctl -xe” For Details When Start VNC Server.

Jerry Zhao March 13, 2020 0

After install VNC server on CentOS, when i run command # systemctl start [email protected]:1.service to start it, i meet bellow error message.

How To Fix Another App Is Currently Holding The Yum Lock Waiting For It To Exit Error

Jerry Zhao March 12, 2020 0

When i install tigervnc server in CentOS with yum command # yum install tigervnc tigervnc-server -y, i meet below error messages. Loaded plugins: fastestmirror, langpacks Existing lock /var/run/yum.pid: another copy […]

How To Enable TCP BBR On Linux To Boost Internet Access Speed

Jerry Zhao March 11, 2020 0

TCP BBR congestion control algorithm is a google open source project that can make full use of server bandwidth. It is used in linux os. This article will tell you […]

How To Enable SSH On CentOS 7

Jerry Zhao March 11, 2020 0

This article will tell you how to install, start, stop, restart OpenSSH server on CentOS. It will also tell you how to connect to it through ssh client software.

virtualbox - devices - drag and drop - bidirectional

How To Enable Copy Paste ( Shared Clipboard ) Between VirtualBox Host And Guest OS

Jerry Zhao March 11, 2020 0

After install a linux ( Ubuntu or CentOS ) in oracle VirtualBox, you should want to enable copy & paste function between the virtual machine and the host machine. This […]

How To Resolve VirtualBox Guest Additions: Kernel Headers Not Found For Target Kernel Error

Jerry Zhao March 11, 2020 1

In this example, i install a CentOS in VirtualBox virtual machine. Then i click the virtual machine to focus it, and then i click Devices —> Insert Guest Additions CD […]

How To Switch Between VirtualBox Host And Guest OS

Jerry Zhao March 10, 2020 0

I run VirtualBox in my Mac OS. And i install CentOS linux as a virtual machine OS in VirtualBox. When i start the CentOS virtual machine, and when i focus […]

centos - applications - system tools - settings

How To Enable GUI Mode In CentOS 7

Jerry Zhao February 29, 2020 0

After install CentOS, when you start it, it will give you a command line interface, this is not user friendly. This article will tell you how to install GUI desktop […]

install centos 7.7 in virtualbox select redhat linux

How To Fix CentOS Network Is Unreachable & Could Not Retrieve MirrorList Could Not Resolve Host mirrorlist.centos.org Unknown Error

Jerry Zhao February 29, 2020 0

Recently i installed CentOS 7.7 on oracle VirtualBox. After installation, when i run command yum update, it shows could not retrieve mirrorlist could not resolve host mirrorlist.centos.org unknown error.

bt configure nginx settings to redirect ssl request to v2ray server

How To Use Nginx Redirect Function To Decorate V2ray Request As Https Request

Jerry Zhao February 27, 2020 0

In previous article How To Install BT VPS Control Panel And Restore WordPress Website Into It i had do following things. Install BT(宝塔) VPS control panel in a Linux VPS. […]