journald

Identity

• Service: systemd-journald
• Unit: systemd-journald.service
• Config: /etc/systemd/journald.conf, /etc/systemd/journald.conf.d/*.conf
• Persistent storage: /var/log/journal/ (survives reboot; exists only if created or Storage=persistent)
• Volatile storage: /run/log/journal/ (lost on reboot; always present while service runs)
• Format: binary (.journal files) — not directly grep-able
• Namespace support: /run/log/journal/<machine-id>/ per-namespace subdirectories

Key Operations