kali网络经常抽风，遇到这种不符合常理的情况要重启 安装 debian系列 sudo apt install openssh-client sudo apt install openssh-server redhat系列 sudo yum install openssh-server 启动 sudo service ssh start service ssh start service start ssh不行 systemctl restart ssh systemctl ssh restart不行 是ssh不是sshd 还可以配置ssh vim /etc/ssh/ssh_config PasswordAuthentication yes vim /etc/ssh/sshd_config PermitRootLogin yes systemctl restart ssh systemctl enable ssh systemctl restart networking 问题：Unable to negotiate with 192.168.8.40 port 22: no matching host key type found. Their offer: ssh-rsa,ssh-dss 解法：https://ttys3.dev/post/openssh-8-8-p1-no-matching-host-key-type-found-their-offer-ssh-rsa/ 编辑用户 ssh 配置 ~/.ssh/config, 对于无法成功连接的host, 增加配置项: HostKeyAlgorithms +ssh-rsa PubkeyAcceptedKeyTypes +ssh-rsa 完整的配置可能看起来像这样: Host myhost Hostname 1.1.1.1 User user001 IdentityFile ~/.ssh/id_rsa # fixup for openssh 8.8 HostKeyAlgorithms +ssh-rsa PubkeyAcceptedKeyTypes +ssh-rsa 或者，像我一样的懒人: Host * ServerAliveInterval 10 HostKeyAlgorithms +ssh-rsa PubkeyAcceptedKeyTypes +ssh-rsa