To update a Debian or Ubuntu Linux container (LXC) virtual machine, you can use the following steps: Log in to the container: lxc exec container-name bash Update the package list: sudo apt-get update Upgrade all installed packages: sudo apt-get upgrade Upgrade the distribution to the latest version: sudo apt-get dist-upgrade Remove any unused packages: sudo … Read more

To find the WiFi password on Mac OS X, follow these steps: Open the Keychain Access application, which can be found in the Applications > Utilities folder. Search for the network name in the search bar and select the network from the list. Right-click (or Control-click) on the network name and select “Get Info”. In … Read more

To install the Suhosin PHP extension on Debian 8 and Ubuntu 14.04 LTS, you need to perform the following steps: Add the PPA repository for Suhosin: sudo add-apt-repository ppa:ondrej/php Update the package list: sudo apt-get update Install the Suhosin extension: sudo apt-get install php-suhosin Restart the Apache web server: sudo service apache2 restart Verify the … Read more

You can temporarily clear environment variables in the Bash shell on a Linux or Unix-like system by using the following command: env -i bash –norc –noprofile This will start a new instance of the Bash shell with a clean environment, without any environment variables set. The -i option specifies that the environment should be cleared, … Read more

In Linux and Unix-like operating systems, you can run a cron job on the last day of the month by using the following syntax in your crontab file: 59 23 28-31 * * [ “$(date +\%d -d tomorrow)” == “01” ] && /path/to/script This cron job will run on the 28th, 29th, 30th, and 31st … Read more

In FreeBSD, you can add a user to the “wheel” group using the pw command. The “wheel” group is a special group in FreeBSD that has the ability to run the su command to switch to the root user. Here’s how: Add the user to the “wheel” group: sudo pw groupmod wheel -m username Replace … Read more

In Ubuntu, you can use the ufw (Uncomplicated Firewall) tool to open a specific port. Here’s how: Install ufw if it’s not already installed: sudo apt-get update sudo apt-get install ufw Enable the firewall: sudo ufw enable Allow incoming traffic on the desired port: sudo ufw allow port_number Replace port_number with the actual port number … Read more

To make a folder (also known as a directory) in Linux or Unix, use the mkdir command. For example: mkdir folder_name This will create a new folder named folder_name in the current working directory. You can also specify the path where you want to create the folder. For example: mkdir /path/to/folder_name Note: Replace folder_name and … Read more

The dd command can be used to test disk I/O performance on Linux and Unix systems. Here’s an example of how to use it: Create a test file with a specified size and block size: dd if=/dev/zero of=testfile bs=1M count=1024 This creates a file named “testfile” of 1 GB (1024 MB) in size, with a … Read more

Here are a few ways to find your public IP address from the Linux command line interface (CLI): Use curl: curl ifconfig.co Use dig: dig +short myip.opendns.com @resolver1.opendns.com Use wget: wget -qO- http://ipecho.net/plain Use ip command: ip addr show dev eth0 | grep ‘inet ‘ | awk ‘{print $2}’ | cut -d/ -f1 Note: Replace … Read more