更小的，我很喜欢:

rename 'y/A-Z/a-z/' *

在不区分大小写的文件系统上，比如OS X的HFS+，你会想要添加-f标志:

rename -f 'y/A-Z/a-z/' *

如果你已经设置了重命名命令(例如，在Mac中通过brew install)，这是有效的:

rename --lower-case --force somedir/*

一行程序:

for F in K*; do NEWNAME=$(echo "$F" | tr '[:upper:]' '[:lower:]'); mv "$F" "$NEWNAME"; done

甚至:

for F in K*; do mv "$F" "${F,,}"; done

注意，这将只转换以字母K开头的文件/目录，因此要相应地进行调整。

( find YOURDIR -type d | sort -r;
  find yourdir -type f ) |
grep -v /CVS | grep -v /SVN |
while read f; do mv -v $f `echo $f | tr '[A-Z]' '[a-z]'`; done

首先自底向上重命名目录sort -r(其中-depth不可用)，然后是文件。 然后grep -v /CVS而不是find…-修剪，因为这样更简单。 对于大目录，对于f在…可以溢出一些shell缓冲区。 使用find…|在读取时避免这种情况。

是的，这将打击只有在情况下不同的文件…

冗长但“没有惊喜和装置的作品”

This script handles filenames with spaces, quotes, other unusual characters and Unicode, works on case insensitive filesystems and most Unix-y environments that have bash and awk installed (i.e. almost all). It also reports collisions if any (leaving the filename in uppercase) and of course renames both files & directories and works recursively. Finally it's highly adaptable: you can tweak the find command to target the files/dirs you wish and you can tweak awk to do other name manipulations. Note that by "handles Unicode" I mean that it will indeed convert their case (not ignore them like answers that use tr).

# adapt the following command _IF_ you want to deal with specific files/dirs
find . -depth -mindepth 1 -exec bash -c '
  for file do
    # adapt the awk command if you wish to rename to something other than lowercase
    newname=$(dirname "$file")/$(basename "$file" | awk "{print tolower(\$0)}")
    if [ "$file" != "$newname" ] ; then
        # the extra step with the temp filename is for case-insensitive filesystems
        if [ ! -e "$newname" ] && [ ! -e "$newname.lcrnm.tmp" ] ; then
           mv -T "$file" "$newname.lcrnm.tmp" && mv -T "$newname.lcrnm.tmp" "$newname" 
        else
           echo "ERROR: Name already exists: $newname"
        fi
    fi    
  done
' sh {} +

参考文献

我的剧本是基于以下这些精彩的回答:

https://unix.stackexchange.com/questions/9496/looping-through-files-with-spaces-in-the-names

如何在Bash中转换字符串为小写?

这里的解决方案都不适合我，因为我所在的系统无法访问perl重命名脚本，而且有些文件包含空格。然而，我发现了一个有效的变体:

find . -depth -exec sh -c '
    t=${0%/*}/$(printf %s "${0##*/}" | tr "[:upper:]" "[:lower:]");
    [ "$t" = "$0" ] || mv -i "$0" "$t"
' {} \;

归功于“Gilles 'SO-停止作恶”，在Unix和Linux StackExchange上看到类似问题“将整个目录树更改为小写名称”的答案。