To add comments to iptables rules on Linux, you can use the -m comment option. For example, to add a comment “Allow SSH” to an iptables rule that allows incoming traffic on port 22 (the default port for SSH), you can use the following command: iptables -A INPUT -p tcp –dport 22 -m comment –comment … Read more
In Bash, you can use the basename command to get the base name of a file or directory name. The basic syntax is as follows: basename <path> For example, to get the base name of a file called /path/to/myfile.txt, you can use the following command: basename /path/to/myfile.txt This command will return “myfile.txt” You can also … Read more
You can use the find command in combination with the du command to recursively search a directory and find the largest file. The following command will search the current directory and its subdirectories, and display the largest file in human-readable format: find . -type f -exec du -Sh {} + | sort -rh | head … Read more
To install VIM enhanced on Fedora Linux 33/34, use the following command: sudo dnf install vim-enhanced This command will install the enhanced version of VIM, which includes additional features and functionality not found in the basic version. Once the installation is complete, you can start using VIM by running the command vim in the terminal.
To update installed packages for security on SUSE 15, you can use the zypper command-line tool. First, update the package lists by running the following command: sudo zypper refresh Then, to update all installed packages that have security updates available, run the following command: sudo zypper update –type patch If you want to update all … Read more
To secure Nginx with Let’s Encrypt on Ubuntu 18.04 using DNS validation, you will need to perform the following steps: Install certbot: sudo apt-get update sudo apt-get install certbot Install the certbot Nginx plugin: sudo apt-get install python3-certbot-nginx Run certbot and specify the domain name for your Nginx server: sudo certbot –nginx -d example.com Follow … Read more
To hide the progress bar output when using the curl command in a Linux/Unix shell script, you can use the -s or –silent option. This will make the curl command run in silent mode, which means that it will not display any progress information or error messages. (Diazepam) For example, if you want to download … Read more
To install LXD pure-container hypervisor on Ubuntu 18.04 LTS, you can use the following steps: Add the LXD PPA (Personal Package Archive) to your system by running the command: sudo add-apt-repository -y ppa:ubuntu-lxc/lxd-stable Update the package lists by running: sudo apt-get update Install the LXD package by running: sudo apt-get install lxd After the installation … Read more
To mount an LVM volume or partition on Linux, you will first need to have the LVM utilities installed. You can install them using the package manager of your distribution. For example, on Ubuntu, you can use the command sudo apt-get install lvm2. Once the LVM utilities are installed, you can use the lvdisplay command … Read more
TigerVNC is a popular VNC server that allows you to remotely access the desktop of a Linux system. Here’s how you can install and configure TigerVNC on Ubuntu: Install TigerVNC server by running the following command: sudo apt-get install tigervnc-standalone-server tigervnc-common Create a new VNC user by running the following command, replacing “username” with the … Read more