You can use the iptables firewall tool to limit the number of connections that can be established to your server from a single IP address. This is useful for preventing denial-of-service attacks and other types of abuse. Here’s an example of how to use iptables to limit the number of connections per IP: Open a … Read more
To show Linux partitions on your system, you can use the lsblk command, which lists all available block devices (i.e., storage devices) in a tree-like format. Here’s how to use the lsblk command: Open a terminal window on your Linux system. Type the following command: lsblk This will list all available block devices on your … Read more
The cat command in Linux/UNIX is used to concatenate and display files, as well as to create and edit files. Here are some basic examples of how to use the cat command: Display the contents of a file: To display the contents of a file, simply use the cat command followed by the file name. … Read more
To make a directory (i.e., create a new directory) on a Linux system, you can use the mkdir command. Here’s how to do it: Open a terminal window on your Linux system. Navigate to the location where you want to create the new directory using the cd command. For example: cd /home/yourusername This will navigate … Read more
The error message “LinuxACPI: I/O resource it87 [0x295-0x296] conflicts with ACPI region IP__ [0x295-0x296]” indicates that there is a resource conflict between two devices in your system. This can cause problems with system stability and performance. Here’s how to resolve this error: Open a terminal window on your Linux system. Use the lspci command to … Read more
To display a list of Ethernet adapters on an Ubuntu Linux system, you can use the ifconfig command. Here’s how to do it: Open a terminal window by pressing Ctrl + Alt + T or by searching for “Terminal” in the application launcher. Type the following command and press Enter: ifconfig -a This will display … Read more
To start, stop, or restart the Apache web server via SSH, you can use the systemctl command. Here’s how to do it: Connect to your server using SSH. To start Apache, enter the following command: sudo systemctl start httpd This will start the Apache web server. To stop Apache, enter the following command: sudo systemctl … Read more
You can turn on SELinux in Redhat or CentOS Linux over a remote SSH session by following these steps: Connect to your remote server using SSH. Open the /etc/selinux/config file using a text editor. You will need root privileges to edit this file. For example: sudo vi /etc/selinux/config Find the following line: SELINUX=enforcing This line … Read more
To transfer files from one UNIX server to another server using a Windows or Linux desktop, you can use several different methods. Here are a few common ways to do this: SCP (Secure Copy): SCP is a command-line tool that allows you to securely copy files between servers using the SSH protocol. To use SCP, … Read more
To configure OpenSSH to listen on an IPv6 address, you need to modify the sshd_config file. Here’s how to do it: Open the sshd_config file: sudo vi /etc/ssh/sshd_config Find the line that begins with ListenAddress: If the line exists, you can skip this step. If not, add the following line: ListenAddress :: This line tells … Read more