Best/Tutorial

The Extra Packages for Enterprise Linux (EPEL) repository provides additional software packages for CentOS and Red Hat Enterprise Linux (RHEL) systems. To install and enable the EPEL repository on CentOS/RHEL 7, follow these steps: Download the EPEL repository RPM: wget https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm Install the RPM: sudo yum install epel-release-latest-7.noarch.rpm Verify that the EPEL repository is enabled: … Read more

logtop is a tool for analyzing log files in real-time and displaying the most frequent log lines. It provides a dynamic, real-time view of log file activity and can be useful for troubleshooting and monitoring logs. Here’s how to install logtop on a Debian-based system: Install the logtop package: sudo apt-get install logtop Run logtop … Read more

On CentOS/RHEL 7, you can manage the networking service using the systemctl command. Here are some common commands to start, stop, and restart networking: Start networking: sudo systemctl start network Stop networking: sudo systemctl stop network Restart networking: sudo systemctl restart network Check the status of the networking service: sudo systemctl status network These commands … Read more

There is no direct way to hide processes from other users in Linux, as all processes are visible to the root user. However, you can hide a process from other users by changing its name. This can be achieved by using the renice or kill command with the -p option, followed by the PID of … Read more

The process to stop Apache from starting on Linux depends on the distribution and the init system you are using. Here are the common methods to stop Apache from starting: SysV Init Systems: On systems using SysV Init, you can use the following command to disable the Apache service: sudo chkconfig apache2 off Systemd: On … Read more

Here’s how you can create and add a swap file on Ubuntu Linux: Determine the size of the swap file: The recommended size for a swap file is equal to twice the size of your RAM. You can use the following command to determine the size of your RAM: free -m Create a swap file: … Read more

You can install dig on Debian Linux 11/10 using the package manager apt. Here’s the process: Update the package lists: sudo apt update Install dig: sudo apt install dnsutils The dnsutils package contains a collection of DNS utilities, including dig. After the installation, you can use the dig command to query DNS servers and retrieve … Read more

You can check the version of Ubuntu you are running from the command line using the following command: lsb_release -a This command will show you the version of Ubuntu you are running, as well as other information about your Linux distribution, such as the release number and the codename. You can also use the cat … Read more

Here’s how you can set up SSH tunneling on a Linux/Unix/BSD server to bypass NAT (Network Address Translation): Connect to the remote server with ssh: ssh [user]@[remote_server_IP] -L [local_port]:[remote_server_IP]:[remote_port] For example, if you want to connect to a remote MySQL server running on remote_server_IP on port 3306, you would use the following command: ssh [user]@[remote_server_IP] … Read more

Here’s how you can add, delete, and grant sudo privileges to users on a FreeBSD server: Add a new user: pw useradd [username] Delete a user: pw userdel [username] Grant sudo privileges to a user: pw usermod [username] -G wheel Note: The pw command is used to manage users and groups in FreeBSD. The useradd … Read more