/Etc/services view system default services and ports corresponding to the individual DAEMONS (services) of startup and shutdown scripts are placed in/etc/init.d/, but REDHAT system is put into the/etc/rc.d/init.d inside, as regards the control parameter file superdaemon is placed in/etc/xinetd.d inside.
Standalone (independent startup) and superdaemon (super service) standalone as the name implies, standalone is directly perform the service scan line stalls and let the executable directly loaded into memory, operation, this way to start this service can be made with a quick response. Generally speaking, this kind of services launch scrip will place the/etc/init.d/directory underneath this, so you can often use: [/etc/init.d/sshdrestart] like to start this service; the service with a super superdaemon as mains, to manage some network services in the use of the inside CENTOS4.3 is xinetd this superdaemon, this way start network services while in response speed be slow, however, can provide some additional through superdaemon control, for example control when to start, when you can be online, the IP can even come in, whether to allow simultaneous online and so on. Usually profile in/etc/xinetd.d/, but needs to be set is finished to [/etc/init.d/xinetdrestart] to start again. If you want the system to switch off the PORT25, above the simplest approach is to first identify the PORT25 's startup process. # Netstat-tnlpTCP00127.0.0.1: 6310.0.0.0: * listen1171/cupsd//22, the port is opened by the program cupsd. If the program is not visible, use the CUPSD nmaplocalhost to view native ports, will show port and the corresponding procedures. # Whichcupsd/usr/sbin/cupsd//identify the cupsd program location. If not found, WHICH is used to LOCATE with the formal notation to find this directive. # Locatecupsd | grep '/cupsd $ '/usr/sbin/ss use RPM to treatment: # rpm-qf/usr/sbin/cupsdcups-1.1.17-13//identify the program name # rpm-qccups | grepinit/etc/rc.d/init.d/cups//identify the program startup. #/Etc/rc.d/init.d/cupsstop//stop program. 1. to start the telnet, first of all you must have installed the telnet Server, so rpm query first to see if there are any installation telnet-server. [/Rpm-qa | greptelnet-server] If you did not install, download or find CD, installation [yuminstalltelnet-server] installation. 2, as is the management, the first superdaemon editable/etc/xinetd.d/telnet this file, the [disable = yes] into [disable = no] to [/etc/init.d/xinetdrestart] restart superdaemon.3, use netstat-tnlp check start PORT23. 4, start-up data placed in/etc/rc.d/rc [0-6] .d/inside, you can use ntsysv and chkconfig command to control, whether or not to post to start the service. For example: 1. To do a lookup on portmap this program will execute? 2. If you post it, how to change it to a post without boot? 3. How to immediately close the PORTMAP service? through [chkconfig--list | grepportmap] and [runlevel] to confirm your environment and PORTMAP is started. (The runlevel can view the current boot interface. Chkconfig can view program startup or not. OFF not started. NO boot. ) If you have started, available [chkconfig--level35portmapoff] to set the boot-time do not start; (3 to 5 for the text interface, graphical interface. ) Can be used [/etc/init.d/portmapstop] to immediately shut down the service. Normal program services need to be started. Acpid-new version of power NASA science module, it is generally recommended, however, some notebook computers may not support this service, it would have to shut down. Atd-------in the management of a single appointment command execution services, should you want to start. Crond-----in the management of the scheduling of critical services, be sure to start. Iptables--Linux built-in firewall software, it can also be started. Keytables-if your keyboard informal format, this service starts may help you. Network---this is important, to network should he, network services. Sshd------this is the system preset starts, you can remote login in textual form. Syslog-system login file records, very important, be sure to start. Xinetd--the superdaemOn, so you want to start. Xfs-------used to manage glyph data service XWindow, if you need this service XWindow to start. Other service programs, and then set startup when needed.
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