查看“︁每天一命令之wget”︁的源代码

=eg=

   wget -q -O - https://pkg.jenkins.io/debian-stable/jenkins.io.key | sudo apt-key add -
   #不下载 ,
   -q,  --quiet                     安静模式 (无信息输出)

==
-O  file  ,not number 0
       --output-document=file
           The documents will not be written to the appropriate files, but all will be concatenated together and written to file.
           If - is used as file, documents will be printed to standard output, disabling link conversion.  (Use ./- to print to a
           file literally named -.)

           Use of -O is not intended to mean simply "use the name file instead of the one in the URL;" rather, it is analogous to
           shell redirection: wget -O file http://foo is intended to work like wget -O - http://foo > file; file will be truncated
           immediately, and all downloaded content will be written there.


=R=
[https://linuxtoy.org/archives/wget-tips.html wget 使用技巧]

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