bash 列出带有文件计数的文件夹的 UNIX 命令
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UNIX command to list folders with file counts
提问by DisgruntledGoat
I want to get a list of folders at the current level (not including their subfolders) and simply print the folder name and a count of the number of files in the folder (preferably filtering to *.jpg if possible).
我想获取当前级别的文件夹列表（不包括它们的子文件夹），只需打印文件夹名称和文件夹中文件的数量（如果可能，最好过滤为 *.jpg）。
Is this possible in the standard bash shell? ls -lprints about everything but the file count :)
这在标准 bash shell 中可能吗？ls -l打印除文件计数之外的所有内容:)
回答by Johannes Schaub - litb
I've come up with this one:
我想出了这个：
find -maxdepth 1 -type d | while read dir; do
count=$(find "$dir" -maxdepth 1 -iname \*.jpg | wc -l)
echo "$dir ; $count"
done
Drop the second -maxdepth 1if the search within the directories for jpg files should be recursive considering sub-directories. Note that that only considers the name of the files. You could rename a file, hiding that it is a jpg picture. You can use the filecommand to do a guess on the content, instead (now, also searches recursively):
-maxdepth 1如果考虑到子目录，在目录中搜索 jpg 文件应该是递归的，则删除第二个。请注意，这仅考虑文件的名称。您可以重命名文件，隐藏它是 jpg 图片。您可以使用该file命令对内容进行猜测（现在，也可以递归搜索）：
find -mindepth 1 -maxdepth 1 -type d | while read dir; do
count=$(find "$dir" -type f | xargs file -b --mime-type |
grep 'image/jpeg' | wc -l)
echo "$dir ; $count"
done
However, that is much slower, since it has to read part of the files and eventually interpret what they contain (if it is lucky, it finds a magic id at the start of the file). The -mindepth 1prevents it from printing .(the current directory) as another directory that it searches.
然而，这要慢得多，因为它必须读取文件的一部分并最终解释它们包含的内容（如果幸运的话，它会在文件的开头找到一个神奇的 id）。这会-mindepth 1阻止它打印.（当前目录）作为它搜索的另一个目录。
回答by Nicole
I found this question after I'd already figured out my own similar script. It seems to fit your conditions and is very flexible so I thought I'd add it as an answer.
在我已经想出我自己的类似脚本之后，我发现了这个问题。它似乎符合您的条件并且非常灵活，所以我想我会将其添加为答案。
Advantages:
好处：
- can be grouped to any depth(0 for
., 1 for first level subdirectories, etc.) - prints pretty output
- no loop, and only one
findcommand, so it's a bit faster on large directories - can still be tuned to add custom filters (maxdepth to make it non-recursive, file name pattern)
- 可以分组到任何深度（0 代表
.，1 代表一级子目录等） - 打印出漂亮的输出
- 没有循环，只有一个
find命令，所以它在大目录上快一点 - 仍然可以调整以添加自定义过滤器（maxdepth 使其非递归，文件名模式）
Raw code:
原始代码：
find -P . -type f | rev | cut -d/ -f2- | rev | \
cut -d/ -f1-2 | cut -d/ -f2- | sort | uniq -c
Wrapped into a function and explained:
包装成一个函数并解释：
fc() {
# Usage: fc [depth >= 0, default 1]
# 1. List all files, not following symlinks.
# (Add filters like -maxdepth 1 or -iname='*.jpg' here.)
# 2. Cut off filenames in bulk. Reverse and chop to the
# first / (remove filename). Reverse back.
# 3. Cut everything after the specified depth, so that each line
# contains only the relevant directory path
# 4. Cut off the preceeding '.' unless that's all there is.
# 5. Sort and group to unique lines with count.
find -P . -type f \
| rev | cut -d/ -f2- | rev \
| cut -d/ -f1-$((${1:-1}+1)) \
| cut -d/ -f2- \
| sort | uniq -c
}
Produces output like this:
产生这样的输出：
$ fc 0
1668 .
$ fc # depth of 1 is default
6 .
3 .ssh
11 Desktop
44 Downloads
1054 Music
550 Pictures
Of course with the number first it can be piped to sort:
当然，第一个数字可以通过管道传输到sort：
$ fc | sort
3 .ssh
6 .
11 Desktop
44 Downloads
550 Pictures
1054 Music
回答by m42
mine is faster to type from the command line. :)
我的从命令行输入速度更快。:)
do the other suggestions offer any real advantage over the following?
其他建议是否比以下建议有任何真正的优势？
find -name '*.jpg' | wc -l # recursive
find -maxdepth 1 -name '*.jpg' | wc -l # current directory only
回答by Dimitre Radoulov
You can do it without external commands:
您可以在没有外部命令的情况下执行此操作：
for d in */; do
set -- "$d"*.jpg
printf "%s: %d\n" "${d%/}" "$#"
done
Or you can use awk(nawkor /usr/xpg4/bin/awkon Solaris):
或者您可以使用awk（在Solaris上为nawk或/usr/xpg4/bin/awk）：
printf "%s\n" */*jpg |
awk -F\/ 'END {
for (d in _)
print d ":",_[d]
}
{ _[]++ }'
回答by John Ellinwood
#!/bin/bash
for dir in `find . -type d | grep -v "\.$"`; do
echo $dir
ls $dir/*.jpg | wc -l
done;
