To force a DHCP client (dhclient) on FreeBSD to renew its IP address and get a new lease, you can use the following command: dhclient -r dhclient The first command, dhclient -r, releases the current DHCP lease, and the second command, dhclient, obtains a new lease from the DHCP server. After running these commands, the … Read more

To install the X Window System XQuartz on macOS for ssh X11 forwarding, follow these steps: Download the XQuartz installer from the official website: https://www.xquartz.org/ Install XQuartz by double-clicking on the downloaded installer package and following the instructions. Once XQuartz is installed, log out and log back in to your macOS account to activate X11 … Read more

In Bash on Linux, macOS, and Unix, you can reissue and repeat a long command without retyping it by using the following methods: Using the up arrow key: Press the up arrow key to recall the previous command. You can scroll through previous commands using the up and down arrow keys. (https://www.beyondbeaute.com/) Once you have … Read more

To show mounted file systems in FreeBSD Unix, you can use the mount command. The mount command displays information about mounted file systems, including the file system type, mount point, and options. To view the list of mounted file systems, run the following command in the terminal: mount This will show a list of all … Read more

To configure a site-to-site IPsec VPN tunnel for remote access in pfSense, follow these steps: Log in to the pfSense web interface and go to VPN > IPsec. Click the “Add P1” button to create a new Phase 1 configuration. In the General Information tab, fill in the following details: Key Exchange version: IKEv2 Remote … Read more

To install the Memcached server on Ubuntu Linux 12.04/14.04 LTS for Python and PHP applications, you can follow these steps: Update the package list: sudo apt-get update Install Memcached: sudo apt-get install memcached Install the Python Memcached library: sudo apt-get install python-memcache Install the PHP Memcached extension: sudo apt-get install php5-memcache Restart the Apache web … Read more

To edit and open files that require administrator privileges on Ubuntu Linux, you can use the sudo command to run a text editor with elevated privileges. The most commonly used text editors on Ubuntu are nano and vi. For example, to edit the /etc/sudoers file using nano, run the following command: sudo nano /etc/sudoers And … Read more

To use ssh-copy-id with an OpenSSH server listening on a different port, specify the port number using the -p option followed by the port number. For example: ssh-copy-id -p <port_number> user@hostname Here, port_number is the number of the port on which the OpenSSH server is listening, user is the username for the account on the … Read more

To change the disk label on an EXT2, EXT3, or EXT4 file system in Linux, you can use the e2label command. Here’s an example of how to change the label of an EXT4 file system located on the /dev/sda1 device to new_label: sudo e2label /dev/sda1 new_label After running this command, you can verify that the … Read more

To find out which programs are listening on a given port number on a FreeBSD Unix system, you can use the sockstat command. Here’s an example to find the program listening on port 80 (HTTP): sockstat -4l | grep :80 The sockstat command displays information about active sockets, and the -4 option specifies that you … Read more