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Because the.ssh directory which ssh-keygen creates is a hidden "dot" directory, pass the -a option to the ls command to view the newly created directory.

因为ssh - keygen创建的. ssh目录是一个隐藏的“点”目录，所以为了查看这个新创建的目录，需要将- a选项传递给ls命令。

youdao

When you use that option, the program exits the moment that Purify encounters an error (errors that are hidden by using the suppress and kill directives do not count).

当您使用这个选项的时候，这个程序退出的时候Purify遇到一个错误(通过使用suppress和kill指令进行隐藏的错误是不计算的)。

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It is also considering a "hidden bypass" option with an underpass, that it acknowledged would "impact significantly less" on the landscape surrounding the 900-year-old cathedral.

BBC: Ely bypass: Campaigners brand scheme 'devastating'

Ms. Lam turned the original, 72-square-foot kitchen into a mud room and installed a new kitchen that comes with the option of being hidden from view with a remote-controlled screen.

WSJ: Luxury Real Estate: Embracing Old Shanghai in a French Concession Lilong

Edinburgh Zoo said it had hidden nothing from the public and that officials had been left with no option other than to destroy the animals.

BBC: Zoo kills endangered antelopes