raspberry--SSH远程登陆The remote system refused the connection.

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如何解决第一次登陆SSH里面的The remote system refused the connection.

raspberry缺省安装了openssh-server所以在这里就不安装了，如果你的系统没有安装的话，再用apt-get安装上即可。

sudo apt install openssh-server

确认openssh-server是否启动：

pi@pi:~ $ ps -e | grep ssh
  574 ?        00:00:00 ssh-agent
  618 ?        00:00:00 ssh-agent

 如果只有ssh-agent，说明openssh-server没有启动。

启动：

pi@pi:~ $ sudo /etc/init.d/ssh start
[ ok ] Starting ssh (via systemctl): ssh.service.

再次查看openssh-server是否启动：

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pi@pi:~ $ ps -e | grep ssh
  484 ?        00:00:00 sshd
  574 ?        00:00:00 ssh-agent
  618 ?        00:00:00 ssh-agent

出现sshd即说明openssh-server已经启动。

特别注意，一定要设置开机自启动openssh-server：

Ubuntu中配置openssh-server开机自动启动：

打开/etc/rc.local文件，在exit 0语句前加入：

　　　　sudo /etc/init.d/ssh start

再次开机，即可完成开机自启动的效果！

pi@pi:~ $ sudo vim /etc/rc.local

#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.

# Print the IP address
_IP=$(hostname -I) || true
if [ "$_IP" ]; then
  printf "My IP address is %s\n" "$_IP"
fi
sudo /etc/init.d/ssh start

exit 0