如果您不提供密码短语，那么ssh - keygen会生成一个未加密的密钥。
If you don't supply a passphrase, then ssh-keygen will generate keys which are not encrypted!
在清单1的代码中，您需要将短语“ gen_website_key ”替换为注册时提供的密钥。
In the code in Listing 1 you will need to replace the phrase "gen_website_key" with they key provided to you during your registration.
它允许ssh程序请求已解密密钥，而不是每次需要时都要求您提供私钥的密码短语。
This allows the SSH program to request an already decrypted key, rather than asking you for the private key's secret passphrase each time it's required.
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