Sunday, January 11, 2009

apachectl - Apache HTTP Server Control Interface

apachectl - Apache HTTP Server Control Interface


apachectl is a front end to the Apache HyperText Transfer Protocol (HTTP) server. It is designed to help the administrator control the functioning of the Apache httpd daemon.

The apachectl script can operate in two modes. First, it can act as a simple front-end to the httpd command that simply sets any necessary environment variables and then invokes httpd, passing through any command line arguments. Second, apachectl can act as a SysV init script, taking simple one-word arguments like start, restart, and stop, and translating them into appropriate signals to httpd.

If your Apache installation uses non-standard paths, you will need to edit the apachectl script to set the appropriate paths to the httpd binary. You can also specify any necessary httpd command line arguments. See the comments in the script for details.

The apachectl script returns a 0 exit value on success, and >0 if an error occurs. For more details, view the comments in the script.

Synopsis

When acting in pass-through mode, apachectl can take all the arguments available for the httpd binary.

apachectl [ httpd-argument ]

When acting in SysV init mode, apachectl takes simple, one-word commands, defined below.

apachectl command


Options

Only the SysV init-style options are defined here. Other arguments are defined on the httpd manual page.

start
Start the Apache httpd daemon. Gives an error if it is already running. This is equivalent to apachectl -k start.
stop
Stops the Apache httpd daemon. This is equivalent to apachectl -k stop.
restart
Restarts the Apache httpd daemon. If the daemon is not running, it is started. This command automatically checks the configuration files as in configtest before initiating the restart to make sure the daemon doesn't die. This is equivalent to apachectl -k restart.
fullstatus
Displays a full status report from mod_status. For this to work, you need to have mod_status enabled on your server and a text-based browser such as lynx available on your system. The URL used to access the status report can be set by editing the STATUSURL variable in the script.
status
Displays a brief status report. Similar to the fullstatus option, except that the list of requests currently being served is omitted.
graceful
Gracefully restarts the Apache httpd daemon. If the daemon is not running, it is started. This differs from a normal restart in that currently open connections are not aborted. A side effect is that old log files will not be closed immediately. This means that if used in a log rotation script, a substantial delay may be necessary to ensure that the old log files are closed before processing them. This command automatically checks the configuration files as in configtest before initiating the restart to make sure Apache doesn't die. This is equivalent to apachectl -k graceful.
configtest
Run a configuration file syntax test. It parses the configuration files and either reports Syntax Ok or detailed information about the particular syntax error. This is equivalent to apachectl -t.

The following additional option is available, but deprecated.

startssl
This is equivalent to apachectl -k start -DSSL. We recommend that you use that command explicitly, or you adjust your httpd.conf to remove the section so that SSL will always be available.
Sylesh

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