Linux上服务的启动，停止和重启

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（1）查看所有的服务

[berry@berry:practice] service
Usage: service < option > | --status-all | [ service_name [ command | --full-restart ] ]
[berry@berry:practice] service --status-all
[ + ] acpid
[ - ] anacron
[ - ] apparmor
[ ? ] apport
[ + ] avahi-daemon
[ + ] bluetooth
[ - ] brltty
[ ? ] console-setup
[ + ] cron
[ + ] cups
[ + ] cups-browsed
[ - ] dbus
[ ? ] dns-clean
[ + ] friendly-recovery
[ - ] grub-common
[ ? ] irqbalance
[ + ] kerneloops
[ ? ] killprocs
[ ? ] kmod
[ ? ] lightdm
[ ? ] networking
[ ? ] ondemand
[ ? ] pppd-dns
[ - ] procps
[ - ] pulseaudio
[ ? ] rc.local
[ + ] resolvconf
[ - ] rsync
[ + ] rsyslog
[ + ] saned
[ ? ] sendsigs
[ ? ] speech-dispatcher
[ - ] sudo
[ ? ] thermald
[ - ] udev
[ ? ] umountfs
[ ? ] umountnfs.sh
[ ? ] umountroot
[ - ] unattended-upgrades
[ - ] urandom
[ + ] vboxadd
[ + ] vboxadd-service
[ - ] vboxadd-x11
[ + ] vpnagentd
[ - ] x11-common

可以看出vpnagetd服务是启动起来的。

[berry@berry:practice] ps -elf | grep vpnagentd
S root - futex_ : ? :: /opt/cisco/anyconnect/bin/vpnagentd
S berry - pipe_w : pts/ :: grep --color=auto vpnagentd
[berry@berry:practice] ps -elf | grep vpnagentd | grep -v berry
S root - futex_ : ? :: /opt/cisco/anyconnect/bin/vpnagentd

berry那一条是运行当前命令出现的。
查看当前vpnagentd这个服务所占用的端口号和相关ip地址和pid和服务名称

[berry@berry:practice] sudo netstat -anp | grep
tcp 127.0.0.1: 0.0.0.0:* LISTEN /vpnagentd
unix [ ] DGRAM /vpnagentd

利用service+服务名称+start/stop/restart对服务进行启动，停止和重启

（1）一种是可以使用service脚本来调度,如:

service 服务名 start

service 服务名 stop

service 服务名 restart

[berry@berry:practice] service vpnagentd status
vpnagentd is stopped
[berry@berry:practice] sudo service vpnagentd start
Starting up Cisco AnyConnect Secure Mobility Client Agent
[berry@berry:practice] service vpnagentd status
vpnagentd (pid ) is running
[berry@berry:practice] service vpnagentd restart
Shutting down Cisco AnyConnect Secure Mobility Client Agent
Starting up Cisco AnyConnect Secure Mobility Client Agent
[berry@berry:practice] service vpnagentd status
vpnagentd (pid ) is running

（2）一种是直接执行某个服务自己的管理脚本，以vpnagetd服务为例

/etc/init.d/vpnagentd start

/etc/init.d/vpnagentd stop

/etc/init.d/vpnagentd restart

[berry@berry:practice] service vpnagentd status
vpnagentd (pid ) is running
[berry@berry:practice] sudo /etc/init.d/vpnagentd stop
Shutting down Cisco AnyConnect Secure Mobility Client Agent
[berry@berry:practice] service vpnagentd status
vpnagentd is stopped
[berry@berry:practice] sudo /etc/init.d/vpnagentd start
Starting up Cisco AnyConnect Secure Mobility Client Agent
[berry@berry:practice] service vpnagentd status
vpnagentd (pid ) is running
[berry@berry:practice] sudo netstat -anp | grep
tcp 127.0.0.1: 0.0.0.0:* LISTEN /vpnagentd
unix [ ] DGRAM /vpnagentd
[berry@berry:practice]

端口号仍然是29754。