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为什么apt-get update告诉我运行apt-get update?
因此,我正在进行以下操作: # apt-get update Get:1 http://ftp.us.debian.org etch Release.gpg [1032B] Hit http://ftp.us.debian.org etch Release (...bunch more of this elided...) Hit http://ftp.us.debian.org etch/contrib Sources Fetched 68.8kB in 1s (37.4kB/s) Reading package lists... Done W: There is no public key available for the following key IDs: 9AA38DCD55BE302B W: GPG error: http://ftp.us.debian.org etch Release: …