1. 安裝openssh-server

sudo apt-get install openssh-server

2、會安裝相關依賴包

~$ dpkg -l | grep ssh
ii  libssh-4:amd64                             0.9.3-2ubuntu2.2                    amd64        tiny C SSH library (OpenSSL flavor)
ii  openssh-client                             1:8.2p1-4ubuntu0.4                  amd64        secure shell (SSH) client, for
 
 secure access to remote machines
ii  openssh-server                             1:8.2p1-4ubuntu0.4                  amd64        secure shell (SSH) server, for secure access from remote machines
ii  openssh-sftp-server                        1:8.2p1-4ubuntu0.4                  amd64        secure shell (SSH) sftp server module, for
 
 SFTP access from remote machines
ii  ssh-import-id                              5.10-0ubuntu1                       all          securely retrieve an SSH public key and install it locally

3. 測試

ssh username@host , 例如：

ssh test@192.168.1.100

輸入密碼，然後連線成功