chkconfig(check config)
chkconfig(check config)功能说明：检查，设置系统的各种服务。
语 法：chkconfig [--add][--del][--list][系统服务] 或 chkconfig [--level <等级代号>][系统服务][on/off/reset]
补充说明：这是Red Hat公司遵循GPL规则所开发的程序，它可查询操作系统在每一个执行等级中会执行哪些系统服务，其中包括各类常驻服务。
参 数：
--add 增加所指定的系统服务，让chkconfig指令得以管理它，并同时在系统启动的叙述文件内增加相关数据。
--del 删除所指定的系统服务，不再由chkconfig指令管理，并同时在系统启动的叙述文件内删除相关数据。
--level<等级代号> 指定读系统服务要在哪一个执行等级中开启或关毕
chkconfig
chkconfig [options] [service [flag] ]
System administration command. Manipulate symbolic links in the /etc/rc.d/rc[0-6] .d directories. chkconfig manages which services will run in a specified runlevel. Valid flags are on, off, or reset to reset the service to defaults given in its initialization script in /etc/rc.d/init.d. To specify defaults in an standard initialization script, add a comment line to the script beginning with chkconfig: followed by the runlevels in which the service should run, and the start and kill priority numbers to assign—e.g., chkconfig: 2345 85 15
Options
Create a start or kill symbolic link in every runlevel for the specified service according to default behavior specified in the service's initialization script.
Remove entries for specified service from all runlevels.
Specify by number the runlevels to change. Provide numbers as a numeric string: e.g., 016 for levels 0, 1 and 6. Use this to override specified defaults.
Print whether the specified service is on or off in each level. If no service is specified, print runlevel information for all services managed by chkconfig.