# Basic SSH connection
ssh root@your-server-ip

# Using a specific SSH key
ssh -i ~/.ssh/your-key root@your-server-ip

# Connect on a custom port
ssh -p 2222 root@your-server-ip

# CPU and memory usage
htop

# Disk usage
df -h

# Network connections
netstat -tulpn

# System uptime and load
uptime

# List running processes
ps aux

# Kill a process
kill -9 PID

# Find processes by name
pgrep -a nginx

# Update package list
apt update

# Upgrade all packages
apt upgrade -y

# Install a package
apt install nginx

# Remove a package
apt remove nginx

# Update packages
yum update -y

# Install a package
yum install nginx

# Remove a package
yum remove nginx

# Start a service
systemctl start nginx

# Stop a service
systemctl stop nginx

# Restart a service
systemctl restart nginx

# Enable service on boot
systemctl enable nginx

# Check service status
systemctl status nginx

# View recent log entries
tail -f /var/log/syslog

# Search logs
grep "error" /var/log/syslog

# Rotate logs manually
logrotate -f /etc/logrotate.conf