Ubuntu

Dpkg is the abbreviation of the Debian package. It is a suite management system specially developed for the “Debian” operating system, which is used for software installation, update, and removal. All Linux distributions from “Debian” use dpkg, such as “Ubuntu”.

Recently, I run the command $ sudo apt update in my Ubuntu virtual machine, it runs successfully. But after that, when I run the command $ sudo apt upgrade, it show me the warning message Waiting for cache lock: Could not get lock /var/lib/dpkg/lock-frontend. It is held by process 12827 (unattended-upgr). This article will tell

When I run the command sudo apt-get install vnc4server in ubuntu 20’s terminal, I get the error message E: Package ‘vnc4server’ has no installation candidate. This article will tell you how to fix it.

This article will tell you how to enable / disable ubuntu firewall, it also tell you how to manage ( open, close, list ) firewall port number. If you find your service which is running on ubuntu server can not be accessed, you should first confirm that the service’s port number is allowed in ubuntu

This article will tell you how to install a VNC server on amazon ec2 ubuntu Linux. It also tells you how to connect to the VNC server from your local machine use TightVNC client.

After I set up an Amazon EC2 Ubuntu Linux server, I can only access it with ssh command. But I really need the GUI interface to browse the ubuntu server easily. After investigating, I finally find the below method of how to enable the XServer on the amazon EC2 Ubuntu Linux server and how to

There are two methods to install/uninstall software on ubuntu, one is through the graphical user interface, another is by command line.