Here’s how you can set up SSH tunneling on a Linux/Unix/BSD server to bypass NAT (Network Address Translation): Connect to the remote server with ssh: ssh [user]@[remote_server_IP] -L [local_port]:[remote_server_IP]:[remote_port] For example, if you want to connect to a remote MySQL server running on remote_server_IP on port 3306, you would use the following command: ssh [user]@[remote_server_IP] … Read more

Here’s how you can add, delete, and grant sudo privileges to users on a FreeBSD server: Add a new user: pw useradd [username] Delete a user: pw userdel [username] Grant sudo privileges to a user: pw usermod [username] -G wheel Note: The pw command is used to manage users and groups in FreeBSD. The useradd … Read more

Here’s how you can install the LEMP (Linux, Nginx, MySQL, and PHP) stack on an Ubuntu Linux 14.04 LTS server: Update the package repository: sudo apt-get update Install Nginx web server: sudo apt-get install nginx Start Nginx and enable it to start at boot: sudo service nginx start sudo update-rc.d nginx defaults Install MySQL server: … Read more

Here are some common tasks for managing processes in FreeBSD and OS X Unix operating system using the ps, kill, nice, and killall commands: List running processes: ps aux Kill a process by PID: kill [pid] Change the priority of a process: nice -n [priority] [command] Kill all processes with a specific name: killall [process … Read more

To check the number of open database connections in MySQL on a Linux or Unix-like server, you can use the following command: mysqladmin status | grep “Threads_connected” Alternatively, you can also use the following SQL query to check the number of open connections in MySQL: SHOW STATUS WHERE `variable_name` = ‘Threads_connected’; Both of these methods … Read more

Here’s how you can install the Apache, MySQL, and PHP stack on a FreeBSD Unix server: Update the package repository: sudo pkg update Install Apache HTTP server: sudo pkg install apache24 Start Apache and enable it to start at boot: sudo sysrc apache24_enable=”YES” sudo service apache24 start Install MySQL server: sudo pkg install mysql80-server Start … Read more

To extract a tar archive to a different directory, you can use the tar command with the -C option. The -C option allows you to specify the destination directory where the files will be extracted. Here’s an example: tar -xf archive.tar.gz -C /path/to/destination In this example, the -xf options specify that the archive should be … Read more

To install MariaDB on a FreeBSD 11 server, you can use the following steps: Add the MariaDB repository to your system’s package sources list. This can be done by creating a file in the /usr/local/etc/pkg/repos directory with the following contents: sudo nano /usr/local/etc/pkg/repos/MariaDB.conf MariaDB: { url: “pkg+http://ftp.osuosl.org/pub/mariadb/repo/10.5/freebsd11-amd64”, enabled: yes } Update your system’s package database … Read more

To initialize dot files without restarting the current shell session, you can use the source command. The source command is used to run a script in the current shell environment, without starting a new shell process. For example, if you have made changes to your .bashrc file and want to apply the changes without logging … Read more

You can run a command when you log out of a Linux session by using a shell script that is executed by the logout process. There are different methods for executing a script on logout, depending on the shell you are using. For the bash shell: Create a shell script with the commands you want … Read more