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docs: add YAML frontmatter to all 151 markdown files

Adds title, description, type, domain, and tags frontmatter to every
doc for improved KB semantic search. The description field is prepended
to every search chunk, and domain/type/tags enable filtered queries.

Type values: context, guide, runbook, reference, troubleshooting
Domain values match directory structure (networking, docker, etc.)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

2026-03-12 09:00:44 -05:00

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title

description

type

domain

Bash Service Management Examples

Systemd Service Script

#!/bin/bash
set -euo pipefail

SERVICE_NAME="myapp"
SERVICE_FILE="/etc/systemd/system/${SERVICE_NAME}.service"

usage() {
    echo "Usage: $0 {install|start|stop|restart|status|logs|uninstall}"
    exit 1
}

install_service() {
    echo "Installing ${SERVICE_NAME} service..."
    
    sudo tee "$SERVICE_FILE" > /dev/null << EOF
[Unit]
Description=My Application Service
After=network.target
Wants=network.target

[Service]
Type=simple
User=myapp
Group=myapp
WorkingDirectory=/opt/myapp
ExecStart=/opt/myapp/bin/myapp
Restart=always
RestartSec=10
Environment=NODE_ENV=production

[Install]
WantedBy=multi-user.target
EOF

    sudo systemctl daemon-reload
    sudo systemctl enable "$SERVICE_NAME"
    echo "Service installed and enabled"
}

manage_service() {
    local action="$1"
    echo "${action^}ing ${SERVICE_NAME} service..."
    sudo systemctl "$action" "$SERVICE_NAME"
    echo "Service ${action}ed successfully"
}

show_status() {
    echo "=== Service Status ==="
    sudo systemctl status "$SERVICE_NAME" --no-pager -l
    echo
    echo "=== Service Logs (last 20 lines) ==="
    sudo journalctl -u "$SERVICE_NAME" --no-pager -n 20
}

show_logs() {
    echo "Following logs for ${SERVICE_NAME}..."
    sudo journalctl -u "$SERVICE_NAME" -f
}

uninstall_service() {
    echo "Uninstalling ${SERVICE_NAME} service..."
    sudo systemctl stop "$SERVICE_NAME" || true
    sudo systemctl disable "$SERVICE_NAME" || true
    sudo rm -f "$SERVICE_FILE"
    sudo systemctl daemon-reload
    echo "Service uninstalled"
}

case "${1:-}" in
    install)
        install_service
        ;;
    start|stop|restart)
        manage_service "$1"
        ;;
    status)
        show_status
        ;;
    logs)
        show_logs
        ;;
    uninstall)
        uninstall_service
        ;;
    *)
        usage
        ;;
esac

Process Monitoring Script

#!/bin/bash
set -euo pipefail

PROCESS_NAME="myapp"
RESTART_COMMAND="/opt/myapp/start.sh"
LOG_FILE="/var/log/myapp-monitor.log"
PID_FILE="/var/run/myapp.pid"

log_message() {
    echo "$(date '+%Y-%m-%d %H:%M:%S') - $1" | tee -a "$LOG_FILE"
}

check_process() {
    if [[ -f "$PID_FILE" ]]; then
        local pid=$(cat "$PID_FILE")
        if kill -0 "$pid" 2>/dev/null; then
            return 0  # Process is running
        else
            rm -f "$PID_FILE"
            return 1  # Process is not running
        fi
    else
        return 1  # PID file doesn't exist
    fi
}

restart_process() {
    log_message "Attempting to restart $PROCESS_NAME..."
    if $RESTART_COMMAND; then
        log_message "$PROCESS_NAME restarted successfully"
    else
        log_message "Failed to restart $PROCESS_NAME"
        exit 1
    fi
}

main() {
    if ! check_process; then
        log_message "$PROCESS_NAME is not running"
        restart_process
    else
        log_message "$PROCESS_NAME is running normally"
    fi
}

main "$@"

3.3 KiB Raw Blame History

Bash Service Management Examples

Systemd Service Script

Process Monitoring Script

3.3 KiB

Raw Blame History