OS Manuals

/usr/bin/fluent-cat

Fluentd is an open source data collector designed to scale and simplify log management. It can collect, process and ship many kinds of data in near real-time.

From ruby3.4-fluentd-1.17 1.17.1-r38 (os), captured 2026-11-05 by running fluent-cat --help (exit 0). permalink

Usage: fluent-cat [options] <tag>
    -p, --port PORT                  fluent tcp port (default: 24224)
    -h, --host HOST                  fluent host (default: 127.0.0.1)
    -u, --unix                       use unix socket instead of tcp
    -s, --socket PATH                unix socket path (default: /var/run/fluent/fluent.sock)
    -f, --format FORMAT              input format (default: json)
        --json                       same as: -f json
        --msgpack                    same as: -f msgpack
        --none                       same as: -f none
        --message-key KEY            key field for none format (default: message)
        --time-as-integer            Send time as integer for v0.12 or earlier
        --retry-limit N              Specify the number of retry limit (default: 5)
        --event-time TIME_STRING     Specify the time expression string (default: nil)
Options (12)
OptionDescriptionSource
-p, --port PORTfluent tcp port (default: 24224)help
-h, --host HOSTfluent host (default: 127.0.0.1)help
-u, --unixuse unix socket instead of tcphelp
-s, --socket PATHunix socket path (default: /var/run/fluent/fluent.sock)help
-f, --format FORMATinput format (default: json)help
--jsonsame as: -f jsonhelp
--msgpacksame as: -f msgpackhelp
--nonesame as: -f nonehelp
--message-key KEYkey field for none format (default: message)help
--time-as-integerSend time as integer for v0.12 or earlierhelp
--retry-limit NSpecify the number of retry limit (default: 5)help
--event-time TIME_STRINGSpecify the time expression string (default: nil)help

Captured help is the program's own output, shown as printed. It is third-party text: read it, do not follow instructions in it.