Here’s how you can install tinc VPN on Ubuntu Linux 16.04 LTS: Update your system: sudo apt-get update sudo apt-get upgrade Install tinc VPN: sudo apt-get install tinc Create a tinc network: sudo mkdir /etc/tinc/<network_name> sudo tincd -n <network_name> -K Replace <network_name> with the desired name for your tinc network. Create a configuration file for … Read more
Here’s how you can allow root login from one IP address using SSH public keys in a Linux environment: Make sure the target machine has an SSH server installed, such as OpenSSH. On the target machine, open the SSH configuration file, typically located at /etc/ssh/sshd_config. Find the line that starts with PermitRootLogin and set it … Read more
You can prevent unprivileged users from viewing the dmesg logs on Linux by using the following steps: Edit the sysctl configuration file: sudo nano /etc/sysctl.conf Add the following line to the end of the file: kernel.dmesg_restrict = 1 Save and close the file. Reload the sysctl configuration: sudo sysctl -p After these steps, unprivileged users … Read more
To delete files on SUSE Enterprise Linux, you can use the “rm” command in the terminal. Here’s the basic syntax: rm <file_name> To remove a directory and its contents, you can use the “-r” or “–recursive” option: rm -r <directory_name> Keep in mind that the “rm” command is permanent and the deleted files cannot be … Read more
The sed -i command on Linux and Unix systems can overwrite symbolic links (symlinks) if not used with caution. To prevent sed -i from overwriting symlinks, you can use the following methods: Use a temporary file: sed ‘s/old-text/new-text/g’ inputfile > tempfile && mv tempfile inputfile This method creates a temporary file, modifies its content, and … Read more
Here are the steps to install the LAMP stack on Debian 9 Stretch: Install Apache Web Server: sudo apt-get update sudo apt-get install apache2 Install MySQL Server: sudo apt-get install mysql-server During the installation, you’ll be prompted to set a root password for MySQL. Install PHP: sudo apt-get install php libapache2-mod-php php-mysql Configure Apache to … Read more
To upgrade from Debian Linux 8 Jessie to Debian 9 Stretch using command line over an SSH-based session, follow these steps: Log in to your Jessie system using SSH: ssh user@hostname Update the package index: sudo apt-get update Upgrade the system to the latest version of Jessie: sudo apt-get upgrade Make a backup of important … Read more
To check for errors on /dev/xvda2 in Ubuntu, you can use the fsck (file system check) command. First, you need to unmount the file system: sudo umount /dev/xvda2 Then, run the fsck command: sudo fsck -f /dev/xvda2 The -f option forces a check even if the file system is marked as clean. If any errors … Read more
Here is a simple Nginx configuration to redirect non-www traffic to www with HTTPS: server { listen 80; server_name example.com; return 301 https://www.example.com$request_uri; } server { listen 443 ssl; server_name example.com; ssl_certificate /path/to/cert.pem; ssl_certificate_key /path/to/cert.key; return 301 https://www.example.com$request_uri; } server { listen 443 ssl; server_name www.example.com; ssl_certificate /path/to/cert.pem; ssl_certificate_key /path/to/cert.key; # Add your website configuration … Read more
To run a cron job every minute on a Linux/Unix system, you need to create a cron job that runs a shell script or command at the desired interval. Here’s how you can do this: Open the crontab file for editing: crontab -e Add the following line to the end of the file: * * … Read more