Check whether the ssh service is turned on in linux

Check whether the ssh service is open (Recommended learning: linux operation and maintenance)

service ssh status

Or:                                                                                                                                              

/etc/init.d/ssh status

Unit test the remote.c function on the virtual machine, first manually check whether ssh is running:

root@dbaudit-desktop:/etc/init.d# /etc/init.d/ssh status

* sshd is running

Or check like this: root@dbaudit-desktop:/etc/init.d# service ssh status

ssh start/running, process 748
root@dbaudit-desktop:~# vi /etc/init.d/ssh stop       关闭ssh服务指令
root@dbaudit-desktop:~# netstat –apntlu      查看端口状态，如果ssh端口22处于listen状态，ssh处于开启。Ssh关闭失败。
root@dbaudit-desktop:~# vi /etc/init.d/ssh     查看ssh脚本内容
root@dbaudit-desktop:~# vi /var/run/sshd.pid     查看ssh进程pid
root@dbaudit-desktop:~# start-stop-daemon --stop  --quiet --oknodo --pidfile /var/run/sshd.pid --exec /usr/sbin/sshd     按照脚本命令关闭ssh
root@dbaudit-desktop:~# netstat –apntlu      查看端口状态，如果ssh端口22处于listen状态，ssh处于开启

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