Rahul Sahu AIDE (Advanced Intrusion Detection Environment) is a popular and powerful tool for monitoring file system changes on a Linux system. It can be used to detect and alert on any unauthorized changes to files, directories, and other system objects. Here are the steps to install and configure AIDE on Debian and Ubuntu Linux systems: Install … Read more
To run a crontab job every minute on a Linux or Unix-like system, you can use the following syntax: * * * * * command-to-be-executed This will run the command-to-be-executed every minute of every hour of every day of the week. Here’s a breakdown of what each * represents: * in the first field represents … Read more
The networking performance of a Linux system can be improved by tuning the network stack buffers sizes. The buffer sizes can be adjusted using the sysctl command. Here are the steps to tune the network stack buffers size: Open a terminal or shell prompt on your Linux system. Verify that the net.core.rmem_max, net.core.wmem_max, net.ipv4.tcp_rmem, and … Read more
You can verify an SSL certificate from a shell prompt using the openssl command-line tool. Here’s how to do it: Open a terminal or shell prompt on your Linux or Unix system. Run the following command to check the SSL certificate of a website: openssl s_client -connect example.com:443 Replace example.com with the domain name or … Read more
In Linux, you can limit the CPU usage of a process by using the cpulimit command. Here’s how to use it: Install cpulimit on your Linux system, if it is not already installed. You can do this using your distribution’s package manager. For example, on Ubuntu or Debian, you can run: sudo apt-get install cpulimit … Read more
To add a swap file in Solaris or OpenSolaris, follow these steps: Determine the size of the swap file that you want to create. The size of the swap file should be at least as large as the amount of RAM installed on the system. For example, if you have 1GB of RAM, you may … Read more
The error message “pkg_version: corrupted record (pkgdep line without argument), ignoring” indicates that the pkg_version utility is encountering a package database issue on your FreeBSD system. This error is typically caused by a corrupted or incomplete package database, and can occur when you install or remove packages. Here are the steps you can take to … Read more
By default, on FreeBSD, users can see information about processes owned by other users by running the ps command. However, you can prevent users from seeing this information by enabling the security.bsd.see_other_uids sysctl option. Here are the steps to prevent users from seeing information about processes owned by other users on FreeBSD: Log in as … Read more
To restart a network interface in Linux, you can use the ifdown and ifup commands, which are used to bring network interfaces down and up, respectively. Here are the steps to restart a network interface in Linux: Open a terminal or command prompt on your Linux system. Type the following command to bring the network … Read more
Slackware Linux uses the rc.inet1 script to manage the network configuration and services. To start, stop, or restart the networking service, you can use the rc.inet1 script with the appropriate options. Here are the commands to start, stop, or restart the networking service on Slackware Linux: To start the networking service, type the following command … Read more