Script for monitoring the temperature of the server

temparature_check.sh

+#!/bin/bash
+
+#Cheking lm-sensors command
+
+if command -v sensors 2>&1 >/dev/null
+then
+    echo "sensors command already found"
+
+else
+
+	# Check for internet connection
+	if ! wget -T 3 --spider https://www.google.com 2>&1; then
+    		echo "No internet connection. Exiting."
+    		exit 1
+	fi
+
+	# Detect OS and install lm-sensors
+	if [ -f /etc/os-release ]; then
+    		. /etc/os-release
+   		OS=$ID
+	else
+    		echo "Unable to detect operating system. Exiting."
+    		exit 1
+	fi
+
+	echo "Detected OS: $OS"
+
+	# Install lm-sensors based on the OS
+	if [[ "$OS" == "ubuntu" || "$OS" == "debian" ]]; then
+    		echo "Installing lm-sensors using apt..."
+    		sudo apt update
+    		sudo apt install -y lm-sensors
+	elif [[ "$OS" == "centos" || "$OS" == "rhel" || "$OS" == "fedora" ]]; then
+    		echo "Installing lm-sensors using yum..."
+    		sudo yum install -y lm_sensors
+	else
+    		echo "Unsupported OS. please install lm-sensors manually and run the script again."
+    		exit 1
+	fi
+
+	# Run sensors-detect to set up sensors (Auto-detect all)
+	echo "Running sensors-detect..."
+	yes | sudo sensors-detect > /dev/null
+
+fi
+
+# Create the monitoring script
+LOG_FILE="$HOME/temp_monitor.log"
+MONITOR_SCRIPT="/usr/local/bin/temp_monitor.sh"
+echo "Creating temperature monitoring script..."
+
+sudo tee $MONITOR_SCRIPT > /dev/null << 'EOF'
+#!/bin/bash
+
+# Maximum allowed temperature in Celsius
+MAX_TEMP=75.0
+
+# Get the current CPU temperature
+CURRENT_TEMP=$(sensors | awk '/Core [0-9]+:/ {print $3}' | sed 's/+//g;s/°C//g' | sort -nr | head -n 1)
+
+# Log file location
+LOG_FILE="$HOME/temp_monitor.log"
+
+# Log the current temperature
+echo "$(date): Current temperature is $CURRENT_TEMP°C" >> $LOG_FILE
+
+# Check if temperature exceeds the threshold
+if [ $(echo "$CURRENT_TEMP > $MAX_TEMP" | bc -l) -eq 1 ]; then
+    echo "$(date): WARNING: Temperature exceeded $MAX_TEMP°C. Shutting down server!" >> $LOG_FILE
+    echo "Temperature exceeded on $(hostname) - Shutting down the server in 10 seconds!"
+    sleep 10 
+    sudo /sbin/shutdown -h now
+fi
+EOF
+
+# Make the script executable
+sudo chmod +x $MONITOR_SCRIPT
+
+# Set up log rotation for the log file to prevent filling up space
+echo "Setting up log rotation..."
+LOGROTATE_CONF="/etc/logrotate.d/temp_monitor"
+sudo tee $LOGROTATE_CONF > /dev/null << EOF
+$LOG_FILE {
+    weekly
+    rotate 4
+    compress
+    missingok
+    notifempty
+    create 640 root root
+}
+EOF
+
+# Set up a cron job to run the monitoring script every minute
+CRON_CHECK=$(sudo crontab -l |grep temp_monitor | wc -l )
+if [ $CRON_CHECK -gt 0 ]
+then
+	echo "Please remove the existing cronjob /usr/local/bin/temp_monitor.sh"
+else
+	echo "Setting up cron job for temperature monitoring..."
+	(sudo crontab -l 2>/dev/null; echo "*/5 * * * * /usr/local/bin/temp_monitor.sh 1>&2 > ~/temp_monitor_cron.out") | sudo crontab -
+
+	echo "Temperature monitoring setup completed."
+fi