To install the Java SDK on a CentOS system using the yum command, follow these steps: Import the Oracle GPG key by running the following command: sudo rpm –import https://yum.oracle.com/RPM-GPG-KEY-oracle-ol7 Create a file called /etc/yum.repos.d/java.repo with the following content: [ol7_developer_EPEL] name=Oracle Linux $releasever Developer (EPEL) baseurl=http://yum.oracle.com/repo/OracleLinux/OL7/developer/EPEL/x86_64/ gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-oracle gpgcheck=1 enabled=1 Update the package index by running … Read more

To install the Lighttpd web server on a CentOS system using the yum command, follow these steps: Update the package index by running sudo yum update. Install Lighttpd by running the following command: sudo yum install lighttpd Start the Lighttpd service using the following command: sudo systemctl start lighttpd Enable Lighttpd to start automatically at … Read more

To minify and compress CSS and JavaScript files at a Linux/Unix shell prompt, you can use the following tools: For CSS files: CSSMin: A simple command line tool to minify CSS files. To install it, run the following command: npm install -g cssmin To minify a CSS file, run the following command: cssmin input.css > … Read more

The chroot command in Linux/Unix allows you to change the root directory for a process and its child processes. This can be useful in several scenarios, such as system recovery, testing, or sandboxing. Here are some examples of using the chroot command: Change the root directory to a new location: The following command changes the … Read more

Setting up SSH keys is a secure way to log into a remote Linux/Unix system without entering a password. Here’s how to set up SSH keys on a Linux/Unix system: Generate a key pair: Open a terminal and run the following command to generate a new SSH key pair: ssh-keygen -t rsa -b 4096 You … Read more

To change the root password on SUSE / OpenSUSE Linux, you can use the passwd command. Here’s how to do it: Log in as root: Log in to the system as the root user. Run the passwd command: Run the following command in the terminal: passwd Enter the new password: You will be prompted to … Read more

In Linux/Unix, you can perform a case-insensitive search using the find command by using the -iname option. The -iname option allows you to match file names case-insensitively. Here’s an example of how to use find to search for files with a certain extension (e.g. .txt) in the current directory and all its subdirectories, ignoring case … Read more

To uninstall MySQL Server in Ubuntu Linux, you can follow these steps: Stop the MySQL service: Run the command sudo service mysql stop to stop the MySQL service. Remove MySQL packages: Use the apt-get command to remove the MySQL packages and its dependencies. Run the command sudo apt-get remove –purge mysql-server mysql-client mysql-common. Remove MySQL … Read more

The error “X11 forwarding request failed on channel 0” occurs when there is a problem with forwarding X11 graphical user interface (GUI) applications over SSH. The X11 forwarding feature allows you to run GUI applications on a remote server and display the results on your local system. Possible solutions to this error include: Checking the … Read more

The error message “/bin/dbus-launch terminated abnormally without any error message” usually occurs when there is a problem with the D-Bus daemon, which is a system message bus that is used to provide inter-process communication on Unix-like systems. Possible solutions to fix this issue include: Restarting the D-Bus daemon: Try restarting the D-Bus daemon by running … Read more