Reason: After installing the open source Kylin Linux system openKylin-1.0 on the server, it is annoying to change the keyboard and mouse when using it.
Goal: Install openssh-server on Debian , install Xshell on the original system, and configure root remote login.
Record it for your reference!
#examine
apt search openssh-server
If installed it will show
openssh-server/now 1:8.4p1-5+deb11u1 amd64 [installed,local]
secure shell (SSH) server, for secure access from remote machine
If a bunch of associated library packages are displayed, it means that they are not installed
#Install
apt install openssh-server
Personal habits do not add "-y", look at what is installed
# configuration
cd /etc/ssh
cp sshd_config sshd_config.bak
vi sshd_config
Make a backup of the original before changing the configuration file
key parameters
Port 22
PermitRootLogin yes
PasswordAuthentication yes
Others keep the default, such as