journalctl Query Builder

Compose a validated argv list and shell-quoted command without running anything.

Preview only: this page never executes commands or contacts a system. Availability and behavior of options such as --grep, --case-sensitive, --output-fields, and namespace or cursor behavior depend on the installed systemd version and journal permissions.

Query

System units (comma or newline separated)

User units

Priority start / threshold

Priority range end

Boot filter

Boot offset / ID

SYSLOG_IDENTIFIER

Executable path

PID

UID

GID

After cursor

Since

Until

Additional journal field matches (one FIELD=value per line)

Message grep

Grep interpretation

Case sensitivity

Line count

Output mode

Output fields (verbose, export, JSON, or cat; comma separated)

Follow Reverse No pager UTC

Safe previews

One argument per line

journalctl

POSIX shell-quoted command

journalctl

Semantics

Build a query to see its semantics.

Import supported command subset

Paste a journalctl command

Importer performs shell-like quote grouping only. It rejects command substitution, variables, pipes, redirects, command separators, and control operators; it never expands or executes input. Unsupported arguments are reported and ignored.