devsetgo · October 3, 2025 23:28 · devsetgo · Aug 1, 2025
diff --git a/custom bashrc b/custom bashrc
 # System monitoring and maintenance functions
 # These functions provide comprehensive system status information
 # and help identify potential issues with the system

 run_system_checks() {
    echo "=== SYSTEM STATUS CHECKS ==="
    echo "Running routine system checks that don't require elevated privileges..."
    echo ""
    
    # Docker container status - shows running containers and their health
    echo "Displaying Docker containers status..."
    echo "This shows all running containers, their status, ports, and resource usage"
    docker ps
    echo ""
    
    # Disk usage - critical for preventing out-of-space issues
    echo "Checking disk usage..."
    echo "Monitors available disk space on all mounted filesystems (-h = human readable)"
    df -h
    echo ""
    
    # Memory usage - helps identify memory leaks or high usage
    echo "Checking memory usage..."
    echo "Shows total, used, free, and available memory (-h = human readable)"
    free -h
    echo ""
    
    # Network connections - shows active ports and connections
    echo "Listing active network connections..."
    echo "Shows listening ports and established connections (-t=TCP, -u=UDP, -l=listening, -n=numeric)"
    netstat -tuln
    echo ""
    
    # Failed services - identifies system service issues
    echo "Checking for failed systemd services..."
    echo "Lists any systemd services that have failed - helps identify system problems"
    systemctl --failed
    echo ""
    
    # System uptime - shows how long system has been running
    echo "Displaying system uptime..."
    echo "Shows system boot time, uptime, users logged in, and load averages"
    uptime
    echo ""
 }

 run_sudo_checks() {
    echo "=== SYSTEM LOGS (requires sudo) ==="
    echo "Running system log checks that require administrative privileges..."
    echo ""
    
    # System logs - shows recent system events and errors
    echo "Showing system logs (last 10 lines)..."
    echo "Displays recent system events from /var/log/syslog - useful for troubleshooting"
    echo "This requires sudo to access system log files"
    sudo tail -n 10 /var/log/syslog
    echo ""
 }

 check_uptime_and_restart() {
    echo "=== UPTIME CHECK ==="
    
    # Get uptime in days
    uptime_days=$(awk '{print int($1/86400)}' /proc/uptime)
    
    echo "Current system uptime: $uptime_days days"
    
    if [ "$uptime_days" -ge 25 ]; then
        echo ""
        echo "⚠️  WARNING: System has been running for $uptime_days days (25+ days)"
        echo "Long uptimes can lead to memory fragmentation and potential issues."
        echo "It's recommended to restart the system for optimal performance."
        echo ""
        echo "Do you want to restart the server now? (y/n)"
        read restart_answer
        if [ "$restart_answer" != "${restart_answer#[Yy]}" ]; then
            echo "Scheduling system restart in 1 minute..."
            echo "You can cancel with: sudo shutdown -c"
            sudo shutdown -r +1 "System restart scheduled via .bashrc maintenance check"
        else
            echo "Restart skipped. Consider restarting during your next maintenance window."
        fi
    else
        echo "✅ System uptime is acceptable ($uptime_days days < 25 days threshold)"
    fi
    echo ""
 }

 # Prompt for system updates
 echo "Do you want to run system updates? (y/n)"
 read answer
 if [ "$answer" != "${answer#[Yy]}" ] ;then
    echo "Running system updates..."
    sudo apt update && sudo apt upgrade -y && sudo apt autoremove -y
    echo ""
 fi

 # Run non-sudo system checks
 run_system_checks

 # Prompt for sudo-required checks
 echo "Do you want to run system log checks? (requires sudo) (y/n)"
 read sudo_answer
 if [ "$sudo_answer" != "${sudo_answer#[Yy]}" ] ;then
    run_sudo_checks
 fi

 # Check system uptime and offer restart if needed
 check_uptime_and_restart

 # Function to check recent login activity
 check_recent_logins() {
    echo "=== RECENT LOGIN ACTIVITY ==="
    echo "Showing login activity from the last 10 days..."
    echo "This displays user logins, logouts, and system reboots"
    echo ""
    
    # Get current date for comparison (10 days ago)
    cutoff_date=$(date -d '10 days ago' '+%Y-%m-%d')
    echo "Showing logins since: $cutoff_date"
    echo ""
    
    # Show recent logins using a simpler approach (oldest to newest)
    echo "Recent logins (last 10 days - oldest to newest):"
    
    # Create a temporary file to store recent logins
    temp_file=$(mktemp)
    
    last -n 50 | while read line; do
        if [[ $line =~ ^(mike|root|[a-zA-Z][a-zA-Z0-9_-]*)[[:space:]] ]]; then
            # Extract date from the line (format: Day Mon DD HH:MM)
            if [[ $line =~ [[:space:]]([A-Z][a-z][a-z])[[:space:]]+([0-9]{1,2})[[:space:]] ]]; then
                month_name="${BASH_REMATCH[1]}"
                day="${BASH_REMATCH[2]}"
                
                # Convert month name to number
                case $month_name in
                    Jan) month="01" ;;
                    Feb) month="02" ;;
                    Mar) month="03" ;;
                    Apr) month="04" ;;
                    May) month="05" ;;
                    Jun) month="06" ;;
                    Jul) month="07" ;;
                    Aug) month="08" ;;
                    Sep) month="09" ;;
                    Oct) month="10" ;;
                    Nov) month="11" ;;
                    Dec) month="12" ;;
                    *) continue ;;
                esac
                
                # Format the date for comparison
                current_year=$(date '+%Y')
                # Convert day to decimal integer first, then zero-pad
                day_int=$((10#$day))
                day_padded=$(printf "%02d" $day_int)
                login_date=$(printf "%04d-%s-%s" $current_year $month $day_padded)
                
                # Compare dates (only show if within last 10 days)
                if [[ $login_date > $cutoff_date ]] || [[ $login_date == $cutoff_date ]]; then
                    echo "$line" >> "$temp_file"
                fi
            fi
        elif [[ $line =~ ^reboot ]]; then
            # Also show reboots if they're recent
            if [[ $line =~ [[:space:]]([A-Z][a-z][a-z])[[:space:]]+([0-9]{1,2})[[:space:]] ]]; then
                month_name="${BASH_REMATCH[1]}"
                day="${BASH_REMATCH[2]}"
                
                case $month_name in
                    Jan) month="01" ;;
                    Feb) month="02" ;;
                    Mar) month="03" ;;
                    Apr) month="04" ;;
                    May) month="05" ;;
                    Jun) month="06" ;;
                    Jul) month="07" ;;
                    Aug) month="08" ;;
                    Sep) month="09" ;;
                    Oct) month="10" ;;
                    Nov) month="11" ;;
                    Dec) month="12" ;;
                    *) continue ;;
                esac
                
                current_year=$(date '+%Y')
                # Convert day to decimal integer first, then zero-pad
                day_int=$((10#$day))
                day_padded=$(printf "%02d" $day_int)
                reboot_date=$(printf "%04d-%s-%s" $current_year $month $day_padded)
                
                if [[ $reboot_date > $cutoff_date ]] || [[ $reboot_date == $cutoff_date ]]; then
                    echo "$line" >> "$temp_file"
                fi
            fi
        fi
    done
    
    # Display the logins in reverse order (oldest to newest) and clean up
    if [[ -s "$temp_file" ]]; then
        tac "$temp_file" | sed 's/^/  /'
    else
        echo "  No recent login activity found in the last 10 days"
    fi
    rm -f "$temp_file"
    echo ""
    
    # Show unique users who logged in recently (simpler version)
    echo "Unique users with recent login activity:"
    last -n 50 | grep -E "^(mike|root|[a-zA-Z][a-zA-Z0-9_-]*)[[:space:]]" | \
    while read line; do
        if [[ $line =~ [[:space:]]([A-Z][a-z][a-z])[[:space:]]+([0-9]{1,2})[[:space:]] ]]; then
            month_name="${BASH_REMATCH[1]}"
            day="${BASH_REMATCH[2]}"
            
            case $month_name in
                Jan) month="01" ;;
                Feb) month="02" ;;
                Mar) month="03" ;;
                Apr) month="04" ;;
                May) month="05" ;;
                Jun) month="06" ;;
                Jul) month="07" ;;
                Aug) month="08" ;;
                Sep) month="09" ;;
                Oct) month="10" ;;
                Nov) month="11" ;;
                Dec) month="12" ;;
                *) continue ;;
            esac
            
            current_year=$(date '+%Y')
            # Convert day to decimal integer first, then zero-pad
            day_int=$((10#$day))
            day_padded=$(printf "%02d" $day_int)
            login_date=$(printf "%04d-%s-%s" $current_year $month $day_padded)
            
            if [[ $login_date > $cutoff_date ]] || [[ $login_date == $cutoff_date ]]; then
                user=$(echo $line | awk '{print $1}')
                echo "  $user"
            fi
        fi
    done | sort | uniq
    echo ""
    
    # Show failed login attempts if available
    echo "Recent failed login attempts (if any):"
    if command -v lastb >/dev/null 2>&1; then
        sudo lastb -n 20 | head -10 2>/dev/null || echo "  No failed login attempts or insufficient permissions"
    else
        echo "  lastb command not available"
    fi
    echo ""
 }

 # Check recent login activity
 check_recent_logins
	# System monitoring and maintenance functions
	# These functions provide comprehensive system status information
	# and help identify potential issues with the system

	run_system_checks() {
	echo "=== SYSTEM STATUS CHECKS ==="
	echo "Running routine system checks that don't require elevated privileges..."
	echo ""

	# Docker container status - shows running containers and their health
	echo "Displaying Docker containers status..."
	echo "This shows all running containers, their status, ports, and resource usage"
	docker ps
	echo ""

	# Disk usage - critical for preventing out-of-space issues
	echo "Checking disk usage..."
	echo "Monitors available disk space on all mounted filesystems (-h = human readable)"
	df -h
	echo ""

	# Memory usage - helps identify memory leaks or high usage
	echo "Checking memory usage..."
	echo "Shows total, used, free, and available memory (-h = human readable)"
	free -h
	echo ""

	# Network connections - shows active ports and connections
	echo "Listing active network connections..."
	echo "Shows listening ports and established connections (-t=TCP, -u=UDP, -l=listening, -n=numeric)"
	netstat -tuln
	echo ""

	# Failed services - identifies system service issues
	echo "Checking for failed systemd services..."
	echo "Lists any systemd services that have failed - helps identify system problems"
	systemctl --failed
	echo ""

	# System uptime - shows how long system has been running
	echo "Displaying system uptime..."
	echo "Shows system boot time, uptime, users logged in, and load averages"
	uptime
	echo ""
	}

	run_sudo_checks() {
	echo "=== SYSTEM LOGS (requires sudo) ==="
	echo "Running system log checks that require administrative privileges..."
	echo ""

	# System logs - shows recent system events and errors
	echo "Showing system logs (last 10 lines)..."
	echo "Displays recent system events from /var/log/syslog - useful for troubleshooting"
	echo "This requires sudo to access system log files"
	sudo tail -n 10 /var/log/syslog
	echo ""
	}

	check_uptime_and_restart() {
	echo "=== UPTIME CHECK ==="

	# Get uptime in days
	uptime_days=$(awk '{print int($1/86400)}' /proc/uptime)

	echo "Current system uptime: $uptime_days days"

	if [ "$uptime_days" -ge 25 ]; then
	echo ""
	echo "⚠️ WARNING: System has been running for $uptime_days days (25+ days)"
	echo "Long uptimes can lead to memory fragmentation and potential issues."
	echo "It's recommended to restart the system for optimal performance."
	echo ""
	echo "Do you want to restart the server now? (y/n)"
	read restart_answer
	if [ "$restart_answer" != "${restart_answer#[Yy]}" ]; then
	echo "Scheduling system restart in 1 minute..."
	echo "You can cancel with: sudo shutdown -c"
	sudo shutdown -r +1 "System restart scheduled via .bashrc maintenance check"
	else
	echo "Restart skipped. Consider restarting during your next maintenance window."
	fi
	else
	echo "✅ System uptime is acceptable ($uptime_days days < 25 days threshold)"
	fi
	echo ""
	}

	# Prompt for system updates
	echo "Do you want to run system updates? (y/n)"
	read answer
	if [ "$answer" != "${answer#[Yy]}" ] ;then
	echo "Running system updates..."
	sudo apt update && sudo apt upgrade -y && sudo apt autoremove -y
	echo ""
	fi

	# Run non-sudo system checks
	run_system_checks

	# Prompt for sudo-required checks
	echo "Do you want to run system log checks? (requires sudo) (y/n)"
	read sudo_answer
	if [ "$sudo_answer" != "${sudo_answer#[Yy]}" ] ;then
	run_sudo_checks
	fi

	# Check system uptime and offer restart if needed
	check_uptime_and_restart

	# Function to check recent login activity
	check_recent_logins() {
	echo "=== RECENT LOGIN ACTIVITY ==="
	echo "Showing login activity from the last 10 days..."
	echo "This displays user logins, logouts, and system reboots"
	echo ""

	# Get current date for comparison (10 days ago)
	cutoff_date=$(date -d '10 days ago' '+%Y-%m-%d')
	echo "Showing logins since: $cutoff_date"
	echo ""

	# Show recent logins using a simpler approach (oldest to newest)
	echo "Recent logins (last 10 days - oldest to newest):"

	# Create a temporary file to store recent logins
	temp_file=$(mktemp)

	last -n 50 \| while read line; do
	if [[ $line =~ ^(mike\|root\|[a-zA-Z][a-zA-Z0-9_-]*)[[:space:]] ]]; then
	# Extract date from the line (format: Day Mon DD HH:MM)
	if [[ $line =~ [[:space:]]([A-Z][a-z][a-z])[[:space:]]+([0-9]{1,2})[[:space:]] ]]; then
	month_name="${BASH_REMATCH[1]}"
	day="${BASH_REMATCH[2]}"

	# Convert month name to number
	case $month_name in
	Jan) month="01" ;;
	Feb) month="02" ;;
	Mar) month="03" ;;
	Apr) month="04" ;;
	May) month="05" ;;
	Jun) month="06" ;;
	Jul) month="07" ;;
	Aug) month="08" ;;
	Sep) month="09" ;;
	Oct) month="10" ;;
	Nov) month="11" ;;
	Dec) month="12" ;;
	*) continue ;;
	esac

	# Format the date for comparison
	current_year=$(date '+%Y')
	# Convert day to decimal integer first, then zero-pad
	day_int=$((10#$day))
	day_padded=$(printf "%02d" $day_int)
	login_date=$(printf "%04d-%s-%s" $current_year $month $day_padded)

	# Compare dates (only show if within last 10 days)
	if [[ $login_date > $cutoff_date ]] \|\| [[ $login_date == $cutoff_date ]]; then
	echo "$line" >> "$temp_file"
	fi
	fi
	elif [[ $line =~ ^reboot ]]; then
	# Also show reboots if they're recent
	if [[ $line =~ [[:space:]]([A-Z][a-z][a-z])[[:space:]]+([0-9]{1,2})[[:space:]] ]]; then
	month_name="${BASH_REMATCH[1]}"
	day="${BASH_REMATCH[2]}"

	case $month_name in
	Jan) month="01" ;;
	Feb) month="02" ;;
	Mar) month="03" ;;
	Apr) month="04" ;;
	May) month="05" ;;
	Jun) month="06" ;;
	Jul) month="07" ;;
	Aug) month="08" ;;
	Sep) month="09" ;;
	Oct) month="10" ;;
	Nov) month="11" ;;
	Dec) month="12" ;;
	*) continue ;;
	esac

	current_year=$(date '+%Y')
	# Convert day to decimal integer first, then zero-pad
	day_int=$((10#$day))
	day_padded=$(printf "%02d" $day_int)
	reboot_date=$(printf "%04d-%s-%s" $current_year $month $day_padded)

	if [[ $reboot_date > $cutoff_date ]] \|\| [[ $reboot_date == $cutoff_date ]]; then
	echo "$line" >> "$temp_file"
	fi
	fi
	fi
	done

	# Display the logins in reverse order (oldest to newest) and clean up
	if [[ -s "$temp_file" ]]; then
	tac "$temp_file" \| sed 's/^/ /'
	else
	echo " No recent login activity found in the last 10 days"
	fi
	rm -f "$temp_file"
	echo ""

	# Show unique users who logged in recently (simpler version)
	echo "Unique users with recent login activity:"
	last -n 50 \| grep -E "^(mike\|root\|[a-zA-Z][a-zA-Z0-9_-]*)[[:space:]]" \| \
	while read line; do
	if [[ $line =~ [[:space:]]([A-Z][a-z][a-z])[[:space:]]+([0-9]{1,2})[[:space:]] ]]; then
	month_name="${BASH_REMATCH[1]}"
	day="${BASH_REMATCH[2]}"

	case $month_name in
	Jan) month="01" ;;
	Feb) month="02" ;;
	Mar) month="03" ;;
	Apr) month="04" ;;
	May) month="05" ;;
	Jun) month="06" ;;
	Jul) month="07" ;;
	Aug) month="08" ;;
	Sep) month="09" ;;
	Oct) month="10" ;;
	Nov) month="11" ;;
	Dec) month="12" ;;
	*) continue ;;
	esac

	current_year=$(date '+%Y')
	# Convert day to decimal integer first, then zero-pad
	day_int=$((10#$day))
	day_padded=$(printf "%02d" $day_int)
	login_date=$(printf "%04d-%s-%s" $current_year $month $day_padded)

	if [[ $login_date > $cutoff_date ]] \|\| [[ $login_date == $cutoff_date ]]; then
	user=$(echo $line \| awk '{print $1}')
	echo " $user"
	fi
	fi
	done \| sort \| uniq
	echo ""

	# Show failed login attempts if available
	echo "Recent failed login attempts (if any):"
	if command -v lastb >/dev/null 2>&1; then
	sudo lastb -n 20 \| head -10 2>/dev/null \|\| echo " No failed login attempts or insufficient permissions"
	else
	echo " lastb command not available"
	fi
	echo ""
	}

	# Check recent login activity
	check_recent_logins
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