On Ubuntu, we can add JAVA_HOME environment variable in /etc/environment file. Note /etc/environment system-wide environment variable settings, which means all users use it. It is not a script file, but rather consists of assignment expressions, one per line. We need admin or sudo to modify this it. Further Reading Ubuntu – EnvironmentVariables 1. JAVA_HOME 1.1 […]
In this tutorial, we will show you how to Dockerize a Java Application (an executable Jar file). Tested with Docker 19.03 Ubuntu 19 Java 8 Maven At the end of the article, we will create an executable Jar file and run inside a docker container. 1. Project Directory 1.1 A standard Maven project structure. See […]
To solve the Ubuntu UI slow performance issue on VirtualBox, increase the “Video Memory” and “Enable 3D Acceleration” Environment VirtualBox 5.1.14 Ubuntu 16 Solution 1. Shutdown VM, clicks “Settings” 2. Display –>> Screen tab –>> Increase the “Video Memory” to Max, and checked the “Enable 3D Acceleration” Done. References What is ‘Ubuntu Unity’ (for the […]
This article shows you how to enable the backlight feature (Screen Lock key) on a CMSTORM keyboard. Environment VirtualBox 5.1.14 Ubuntu 16 1. Solution – Quick To fix it quickly, run the following command in a terminal, and press the “Screen Lock key” again, the backlight should be enabled. Terminal $ xmodmap -e ‘add mod3 […]
In this tutorial, we will show you how to install Oracle JDK 8 On Debian, manually. Environment : Debian 7 OpenJDK 1.7 is installed. (Switch to Oracle JDK 8 later) At the time of writing, OpenJDK 1.8 is not included in the default apt-get repository yet. I just don’t like the default apt repository schedule, […]
Dual boot Windows and Ubuntu, but Ubuntu is unable to access the Windows partition /dev/sdb3, shows the following error message : Error mounting /dev/sdb3 … status 14: The disk contains an unclean file system (0, 0). Metadata kept in Windows cache, refused to mount. Failed to mount ‘/dev/sdb3’: Operation not permitted The NTFS partition is […]
This guide shows you how to install MongoDB on Ubuntu. Ubuntu 12.10 MongoDB 2.2.3 1. Add 10gen package to source.list.d Ubuntu 12 comes with a “mongo” package, but not the latest version. $ sudo apt-cache search mongodb mongodb mongodb-clients mongodb-dev mongodb-server It’s recommended to add 10gen package to /etc/apt/sources.list.d, as it contains the latest stable […]
Problem Ubuntu doesn’t has build-in tool for browsing or accessing the Windows share in network. Is there any ways to access the Windows share in Ubuntu? Solution Ubuntu has smb installed by default, you can use smb to access the Windows shares. 1. File Browser Open “Computer – File Browser”, Click on “Go” –> “Location…” […]
Steps to install Maven on Ubuntu.
There is two ways to install Apache Http server on Ubuntu : Use apt command to install it automatically. Configure and build the source code, and install it manually. 1. Install it automatically 1. Search Apache package with “apt-cache search” command apt-cache search apache 2. Get Apache package name “apache2”, issue the “apt-get” install command. […]
This tutorial shows you how to install OpenJDK 8, 11, 16, and other JDK builds on Ubuntu 20. 1. APT Install JDK (OpenJDK 8 and 11) 2. Install JDK manually (OpenJDK 16) 3. Install Oracle JDK on Ubuntu 4. Switch between different JDK versions 5. Add JAVA_HOME to Ubuntu environment variable 6. References 1. APT […]
Problem Ubuntu…beside Default VI is suck, here is another issue for me. My mouse wheel scrolling is not working in Ubuntu8.04. However i installed Ubuntu in vmware, but i do not think it is vmware cause of this issue. Solution Here i find some useful information regarding Mouse Wheel Scrolling malfunction issuse, please check Ubuntu […]
This tutorial shows you how to install Tomcat on Ubuntu, with help of the buith-in apt-get command. 1. apt-get install 1.1 Find an available Tomcat package to install $ sudo apt-cache search tomcat //… tomcat7 – Servlet and JSP engine tomcat7-admin – Servlet and JSP engine — admin web applications tomcat7-common – Servlet and JSP […]
On Ubuntu, there are two system-wide environment variables, both files need admin or sudo to modify it. /etc/environment – It is not a script file, purely assignment expressions, one per line. /etc/environment PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games" JAVA_HOME=/usr/lib/jvm/adoptopenjdk-11-hotspot-amd64 LD_LIBRARY_PATH=/usr/local/lib:/usr/lib/postgresql/8.3/lib /etc/profile.d/*.sh – Files with .sh extension in the /etc/profile.d/ folder. /etc/profile.d/myenv.sh export JAVA_HOME=JAVA_HOME=/usr/lib/jvm/adoptopenjdk-11-hotspot-amd64 export LD_LIBRARY_PATH=/usr/local/lib:/usr/lib/postgresql/8.3/lib export PATH=$PATH:$JAVA_HOME/bin Further Reading: Ubuntu […]
Default VI for Ubuntu is suck, i have to go install a full package of vi myself. However when i try to compile the vi source code, i hit following error error: C compiler cannot create executables It’s cause all my gcc compiler error, hmm…Ubuntu, why you have so many problem? Compiler also hit error….. […]
