Bash：循环、复制、备份
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Bash: for loop, copy, backup
提问by sixtyfootersdude
Hey, not 100% sure what this error means.
嘿，不是 100% 确定这个错误意味着什么。
% for f in "*" ; do cp $f ../backup/backup$f ; done
cp: ../backup/backup* not found
The purpose is to copy all the files into a folder into a backup folder and rename the files to backup.
目的是将所有文件复制到一个文件夹中，然后将其重命名为备份文件夹。
回答by Mark Byers
The *shouldn't be in quotes:
本*不应该在报价：
for f in * ; do cp $f ../backup/$f ; done
When you use quotes this prevents the shell from expanding it, so it is looking for a file called *, not all files in the directory which is what you meant.
当您使用引号时，这会阻止 shell 扩展它，因此它正在寻找一个名为 的文件*，而不是目录中的所有文件，这就是您的意思。
回答by janmoesen
You are quoting the wrong things: quote the variables, not the wildcards!
您引用了错误的内容：引用变量，而不是通配符！
% for f in *; do cp "$f" "../backup/$f" ; done
% for f in *; do cp "$f" "../backup/$f" ; done
BTW, in this case, you can simply do:
顺便说一句，在这种情况下，您可以简单地执行以下操作：
% cp * ../backup/
% cp * ../backup/
回答by sud03r
Or may be this:
或者可能是这样的：
cp -b * ../backup
If you want them to be renamed:
如果要重命名它们：
% for f in * ; do cp "$f" "../backup/${f}-backup" ; done
