h2o8

Usage

Overview

H2O is a performance-optimized HTTP/1.x and HTTP/2 web server. Designed from ground-up, the server takes full advantage of HTTP/2 features including prioritized content serving and server push.

This manual page describes the options supported by the h2o command. Note that H2O should in most cases be run as a system service (through a systemd(1) service or an initscript).

Options

-c, --conf FILE

Configuration file (default: /etc/h2o/h2o.conf)

-m, --mode mode

mode specifies one of the following modes:

worker

the h2o process will stay in the foreground and handle all incoming connections itself (default).

master

h2o will be started using the /usr/share/h2o/start_server helper; in this mode the start_server process will stay in the foreground and spawn an h2o worker process for handling incoming connections. SIGHUP can be sent to the master process to reconfigure or upgrade the server without service downtime.

daemon

spawns a master process in the background and exits. error-log must be configured when using this mode, as all errors are logged to the error log instead of output to standard error.

test

tests the configuration and exits

-t, --test

Synonym of `--mode=test`

-v, --version

Prints the version number

-h, --help

Prints usage help.