Software Development & Operating Systems
Notes on Software Development & Operating Systems
Linux
How to determine type of RAM installed in CentOS
su – dmidecode –type 17 I have not determined if this command works in other linux distros.
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How to determine CPU type in CentOS
lscpu I have not verified if this works in other linux distros.
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Install CentOS 7 Server with GUI
Boot from the CentOS 7 Installation DVD and select Install CentOS 7. Select language to use during the installation process and click [Continue]. You should now be at the Installation Summary screen. Under SOFTWARE, click Software Selection. Select Server with GUI and click [Done]. Note for this next part of configuring RAID 0 at the [...]
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Install and run Minecraft Server on CentOS 7 Server
Create a CentOS Installation DVD The first thing you need to do if you do not have it already is Create a CentOS Installation DVD Install CentOS 7 Server with GUI Follow the steps in this article to install CentOS 7, but note that you will want to use a static IP so that you [...]
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Create a CentOS Installation DVD
Point your browser at https://www.centos.org. Click the [Get CenotOS Now] button. Click the DVD ISO button. choose a mirror and download the .iso image. Burn the .iso image to a blank writable DVD.
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Open mysql on firewall in CentOS 7
Login or set user to root su – See the before of what services are open on the public zone firewall-cmd –zone=public –list-services Open up access to mysql on the public zone firewall-cmd –zone=public –add-service=mysql See the after of what services are open on the public zone firewall-cmd –zone=public –list-services Once verified, modify the permanent [...]
Install MariaDB on CentOS 7
Starting in CentOS 7, MariaDB has replaced MySQL as the default database installation. MariaDB is a 100% compatible binary replacement of MySQL. Login as root su – Download and Install MariaDB yum install mariadb-server Configure MariaDB to start on System boot systemctl enable mariadb Start the mariadb service systemctl start mariadb Make MariaDB more secure [...]
Installing Oracle JDK on Ubuntu
You must run these 3 commands: sudo apt-get install python-software-properties sudo add-apt-repository ppa:webupd8team/java sudo apt-get update To install Java 7, run this command: sudo apt-get install oracle-java7-installer To install Java 8, run this command: sudo apt-get install oracle-java8-installer To change the default Java installation, run this command: sudo update-alternatives –config java
Change default version of java on CentOS
Perform these steps to change the default version of java: Login in or switch user to root: su – Type this command: alternatives –config java If you do not see the version you want listed then you must use the alternatives –install command, so your version of java can be “installed”. List the versions of [...]
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Fix error with making a screenshot in CentOS
Perform these steps if you are getting this error: Failed to execute child process “gnome-screenshot” (No such file or directory) Login in or switch user to root: su – Type this command: yum install gnome-utils -y
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