1. ssh-keygen -t rsa -b 4096 -C “[email protected]” 然後回車三連擊…

2. 進入目錄（執行cd ~/.ssh）,可以看到當前目錄下多出兩個檔案 id_rsa.pub 和 id_rsa 帶字尾是公鑰，不帶是私鑰

3. 用vi 編輯器將 id_rsa.pub 開啟公鑰，將全部內容複製(私鑰別動)

   然後進入github 登入>點頭像>點settings>點SSH and GPG keys>點New SSH key，如圖

4. Title:只是一個標識，隨意寫

5. key:貼上剛才複製的 內容 ，最後點選 Add SSH key以後本機對遠端倉庫做操作不用輸密碼了

備註：ssh-keygen用法我給貼出來了：

ssh-keygen [-q] [-b bits] [-t dsa | ecdsa | ed25519 | rsa]
[-N new_passphrase] [-C comment] [-f output_keyfile]
ssh-keygen -p [-P old_passphrase] [-N new_passphrase] [-f keyfile]
ssh-keygen -i [-m key_format] [-f input_keyfile]
ssh-keygen -e [-m key_format] [-f input_keyfile]
ssh-keygen -y [-f input_keyfile]
ssh-keygen -c [-P passphrase] [-C comment] [-f keyfile]
ssh-keygen -l [-v] [-E fingerprint_hash] [-f input_keyfile]
ssh-keygen -B [-f input_keyfile]
ssh-keygen -D pkcs11
ssh-keygen -F hostname [-f known_hosts_file] [-l]
ssh-keygen -H [-f known_hosts_file]
ssh-keygen -R hostname [-f known_hosts_file]
ssh-keygen -r hostname [-f input_keyfile] [-g]
ssh-keygen -G output_file [-v] [-b bits] [-M memory] [-S start_point]
ssh-keygen -T output_file -f input_file [-v] [-a rounds] [-J num_lines]
[-j start_line] [-K checkpt] [-W generator]
ssh-keygen -s ca_key -I certificate_identity [-h] [-U]
[-D pkcs11_provider] [-n principals] [-O option]
[-V validity_interval] [-z serial_number] file ...
ssh-keygen -L [-f input_keyfile]
ssh-keygen -A
ssh-keygen -k -f krl_file [-u] [-s ca_public] [-z version_number]
file ...
ssh-keygen -Q -f krl_file file ...

一般登入機器還是有個自己的鑰，還是好一點，具體生成自己的key，其實也很簡單：

ssh-keygen -t rsa -b 2048 -f play_key -C play_key

可以不用加密直接三次enter，便生成自己的key