You can delete a directory in Linux terminal using the rmdir or rm command. To delete an empty directory, you can use the rmdir command followed by the name of the directory you want to delete: rmdir directory_name If the directory is not empty, you can use the rm command with the -r (or –recursive) … Read more

To extract and decompress a .bz2 or .tbz2 file in Linux or Unix, you can use the tar command with the j option to handle bzip2 compression: tar xvjf file.tbz2 or tar xvjf file.bz2 Here, x option is used to extract the contents of the archive, v option is used to display verbose output, and … Read more

A LAMP server is a web server that uses the Linux operating system, Apache web server software, MySQL database management system, and PHP scripting language. To set up a LAMP server on Debian Linux 8 (Jessie), follow these steps: Install Apache web server: sudo apt-get install apache2 Install MySQL database: sudo apt-get install mysql-server Install … Read more

To find the version and patch level number of a FreeBSD system, you can use the following command: freebsd-version -ku This will print the version and patch level of the FreeBSD operating system. For example, if your system is running FreeBSD 12.2, the output will be: 12.2-RELEASE If your system has any patches installed, the … Read more

In Bash, you can find out the exit code of each piped command by checking the exit code of the last command in the pipe. To do this, you can use the special shell variable $? which contains the exit code of the last executed command. For example, consider the following command: command1 | command2 … Read more

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