linux

This runbook outlines the steps to configure Nginx as a reverse proxy for an application. Prerequisites Access to the server Nginx installed Application running on a specific port Steps Install Nginx sudo apt install -y nginx Create Nginx Configuration File sudo nano /etc/nginx/sites-available/app_proxy Add the Configuration server { listen 80; server_name yourdomain.com; location / { proxy_pass http://localhost:3000; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header X-Forwarded-Proto $scheme; } } Enable the Configuration sudo ln -s /etc/nginx/sites-available/app_proxy /etc/nginx/sites-enabled/ sudo nginx -t sudo systemctl restart nginx Verification Check the application at http://yourdomain....

This runbook provides instructions on how to create a cron job on a Linux server. Prerequisites Access to the server Root or sudo privileges Steps Open Crontab crontab -e Add a Cron Job # m h dom mon dow command 0 2 * * * /usr/bin/backup.sh Save and Exit Save the file and exit the editor. Verify the Cron Job crontab -l Verification Ensure the cron job is listed. Check logs to verify the cron job runs at the specified time....

This runbook provides steps to monitor system performance on a Linux server. Prerequisites Access to the server Steps Check CPU Usage top Check Memory Usage free -h Check Disk Usage df -h Check Network Usage iftop Install Monitoring Tools (Optional) sudo apt install -y htop glances nload Run Monitoring Tools htop glances nload Verification Ensure system resources are within acceptable limits. Identify and troubleshoot any bottlenecks or issues.

This runbook explains how to set up a firewall on a Linux server using UFW. Prerequisites Access to the server Root or sudo privileges Steps Install UFW sudo apt install -y ufw Allow SSH Connections sudo ufw allow OpenSSH Enable the Firewall sudo ufw enable Allow Other Essential Services sudo ufw allow http sudo ufw allow https Check Firewall Status sudo ufw status verbose Verification Ensure SSH connection remains intact. Verify that the web server and other allowed services are accessible....

This runbook provides the steps to set up a new Linux server. Prerequisites Access to the server Root or sudo privileges Steps Update Package Lists sudo apt update Upgrade Packages sudo apt upgrade -y Install Common Utilities sudo apt install -y curl wget git vim Set Up Firewall sudo ufw allow OpenSSH sudo ufw enable Create a New User sudo adduser newuser sudo usermod -aG sudo newuser Configure SSH Access sudo cp /root/....