You can check the version of Ubuntu you are running from the command line using the following command: lsb_release -a This command will show you the version of Ubuntu you are running, as well as other information about your Linux distribution, such as the release number and the codename. You can also use the cat … Read more

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