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service命令，顾名思义，就是用于管理Linux操作系统中服务的命令。

这个命令不是在所有的linux发行版本中都有。主要是在redhat、fedora、mandriva和centos中。

此命令位于/sbin目录下，用file命令查看此命令会发现它是一个脚本命令。

分析脚本可知此命令的作用是去/etc/init.d目录下寻找相应的服务，进行开启和关闭等操作。

开启httpd服务器：service httpd start

关闭mysql服务器：service mysqld stop

强烈建议大家将service命令替换为/etc/init.d/mysqld stop （因为有一些linux的版本不支持service）

Usage: service < option > | –status-all | [ service_name [ command | –full-restart ] ]

service oracle start

service --status-all #显示所有服务的状态[root@beanpc /]# service --status-allabrtd (pid  1645) is running...abrt-dump-oops (pid 1653) is running...acpid (pid  1419) is running...atd (pid  1692) is running...auditd (pid  2511) is running...automount (pid  1499) is running...avahi-daemon (pid  1326) is running...Usage: /etc/init.d/bluetooth {start|stop}certmonger (pid  1836) is running...Runningcgred is stoppedconmand is stoppedcpuspeed is stoppedcrond (pid  5541) is running...cupsd (pid  1394) is running...dnsmasq (pid 1821) is running...Generated by ebtables-save v1.0 on Sun Dec 27 07:34:24 CST 2015*nat:PREROUTING ACCEPT:OUTPUT ACCEPT:POSTROUTING ACCEPT/usr/sbin/fcoemon -- UNUSEDNo interfaces created.firstboot is not scheduled to rungpm is stoppedhald (pid  1428) is running...JAVA_EXECUTABLE or HSQLDB_JAR_PATH in '/etc/sysconfig/hsqldb' is set to a non-file.httpd is stoppedip6tables: Firewall is not running.iptables: Firewall is not running.irqbalance is stoppediscsi is stoppediscsid is stoppedKdump is not operationalksm is not runningksmtuned (pid  1669) is running...ktune settings are not applied.libvirtd (pid  1716) is running...startedlibvirt-qmf is stoppedlldpad is stoppedlvmetad is stoppedmailman is stoppedqpidd is stoppedmatahari-qmf-hostd is stoppedmatahari-qmf-networkd is stoppedmatahari-qmf-rpcd is stoppedmatahari-qmf-serviced is stoppedmatahari-qmf-sysconfigd is stoppedmatahari-qmf-sysconfig-consoled is stoppedChecking for mcelogmcelog is stoppedmcstransd is stoppedmdmonitor is stoppedmemcached is stoppedmessagebus (pid  1301) is running...mip6d is stoppedmultipathd is stoppedmysqld is stoppedNo open transactionnetconsole module not loadedConfigured devices:lo eth0 eth1Currently active devices:lo eth0 eth1 virbr0NetworkManager (pid  1312) is running...rpc.svcgssd is stoppedrpc.mountd is stoppednfsd is stoppedrpc.rquotad is stoppedrpc.statd (pid  1345) is running...ntpd is stoppednumad is stoppedoddjobd is stoppedportreserve is stoppedmaster (pid  1621) is running...Process accounting is disabled.qpidd is stoppedquota_nld is stoppedradvd is stoppedrdisc is stoppedrestorecond (pid  2750) is running...rhsmcertd (pid 1807) is running...rngd is stoppedrpcbind (pid  1274) is running...rpc.gssd is stoppedrpc.idmapd (pid 1384) is running...rpc.svcgssd is stoppedrsyslogd (pid  1226) is running...sandbox is stoppedsaslauthd is stoppedsfcb is not runningsmartd is stoppedsnmpd is stoppedsnmptrapd is stoppedspice-vdagentd is stoppedopenssh-daemon (pid  1539) is running...sssd is stoppedNo managed stap-server is runningUsage: /etc/init.d/stinit {start}svnserve is stoppedNo systemtap scripts are presenttuned is stoppedvirt-who dead but subsys lockedXvnc is stoppedvsftpd (pid 7820) is running...wdaemon is stoppedwpa_supplicant (pid  1341) is running...xinetd is stoppedypbind is stopped[root@beanpc /]#

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