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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