BASH 重定向创建文件夹
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BASH redirect create folder
提问by Baruch
How can I have the following command
我怎样才能有以下命令
echo "something" > "$f"
where $fwill be something like folder/file.txtcreate the folder folderif does not exist?
如果不存在，$f将在哪里folder/file.txt创建文件夹folder？
If I can't do that, how can I have a script duplicate all folders (without contents) in directory 'a' to directory 'b'?
如果我不能这样做，我怎样才能让脚本将目录“a”中的所有文件夹（没有内容）复制到目录“b”？
e.g if I have
例如，如果我有
a/f1/
a/f2/
a/f3/
a/f1/
a/f2/
a/f3/
I want to have
我希望有
b/f1/
b/f2/
b/f3/
b/f1/
b/f2/
b/f3/
采纳答案by jordanm
The other answers here are using the external command dirname. This can be done without calling an external utility.
这里的其他答案是使用外部命令dirname。这可以在不调用外部实用程序的情况下完成。
mkdir -p "${f%/*}"
You can also check if the directory already exists, but this not really required with mkdir -p:
您还可以检查目录是否已经存在，但这并不是真正需要的mkdir -p：
mydir="${f%/*}"
[[ -d $mydir ]] || mkdir -p "$mydir"
回答by Alex Gitelman
try
尝试
mkdir -p `dirname $f` && echo "something" > $f
回答by dogbane
You can use mkdir -pto create the folder before writing to the file:
您可以使用mkdir -p在写入文件之前创建文件夹：
mkdir -p "$(dirname $f)"
回答by shock_one
echo "something" | install -D /dev/stdin $f
