How does a unit file work?
A .service unit file has three sections. [Unit] holds the description and dependencies — After= tells systemd which target or service should be up first. [Service] defines how the service runs: ExecStart is the main command, User is the account it runs as, and WorkingDirectory is the directory it runs from. [Install] defines which target (multi-user.target) the service attaches to when enabled with systemctl enable — i.e., when it starts at boot.
Type=simple means the process launched by ExecStart is itself the main process of the service — the right choice for programs like Node.js, Python or Go that run in the foreground and don't fork/daemonize themselves. Type=forking, by contrast, is for classic Unix daemons that fork and let the parent exit while a child keeps running in the background; in that case a PIDFile is usually needed so systemd can track the real process.
Restart=on-failure combined with RestartSec=5 tells systemd to automatically restart the service when it crashes or exits with a non-zero code, but with a 5-second pause between attempts. Without that pause, a persistently broken service could be relaunched dozens of times per second, hammering the CPU (a crash-loop); RestartSec throttles that loop so the system stays stable. The always policy restarts regardless of exit reason (including clean shutdowns), while no disables automatic restarts entirely.
After saving the unit file, systemd needs to pick it up with sudo systemctl daemon-reload. To watch a service's live logs, use journalctl -u <service-name> -f — this reads the service's stdout/stderr through journald, systemd's logging subsystem.
When should you use systemd Service Generator?
The KEYDAL systemd Service Generator tool is a browser-based utility that developers, system administrators, SEO specialists and enterprise technology teams use in their daily operations. It requires no installation, is free, and produces results instantly. It is designed so local teams can run audits without connecting to server environments and run analyses without touching production.
Typical scenarios include: post-migration verification, comparing domain or hosting providers, diagnosing customer issues, security auditing (pre-pentest reconnaissance), root-cause analysis of email deliverability problems, validating CDN or proxy configuration, surfacing technical audit data for SEO teams, and rapid information gathering during incident response. You can copy results as text and share them or paste them into internal documentation.
The KEYDAL infrastructure team provides web hosting, VPS, dedicated server management, server hardening, DNS configuration and SSL/TLS deployment services from Türkiye. Beyond these tools, we deliver server setup and operations support across Hetzner, OVHcloud, Contabo, DigitalOcean and Turkish providers.
Your queries are never stored on our servers
KEYDAL tools run stateless: domain names, IPs, URLs or other inputs are not persisted to any database. Logs are kept only for security purposes (rate limiting, abuse detection) and deleted within 30 days. For tools that handle sensitive data (tokens, API keys, JWTs), processing happens entirely in your browser — nothing is sent over the network. See our Privacy Policy for details.
All tools run over HTTPS with TLS 1.3 support. KEYDAL is a Türkiye-based technology company and complies fully with local data-protection regulations (KVKK) and GDPR principles.
You may also be looking for
The KEYDAL free tools collection includes DNS lookup, WHOIS lookup, SSL certificate checker, HTTP headers analyzer, IP geolocation, uptime checker, JSON formatter, JWT decoder, Base64 encode/decode, QR code generator, meta tag analyzer and robots.txt tester. All browser-based, free, no installation.
If you are comparing server prices, see our web hosting, VPS, VDS, cloud hosting, dedicated server and storage pages. See all tools →