Linux BASH shell is very powerful. You must have heard of “where there is a shell, there is a way”. We can write a script that recursively changes all the filenames to lowercases for specified folders and their sub directories.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | #tolower.sh convert() { mv $1 `dirname $1`/`basename $1 | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'` } [ $# = 0 ] && { echo "Usage: tolower item1 item2 ..."; exit; } for item in $* do [ "`dirname $item`" != "`basename $item`" ] && { [ -d $item ] && { for subitem in `ls $item` do tolower $item/$subitem done } convert $item } done |
#tolower.sh
convert()
{
mv $1 `dirname $1`/`basename $1 | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'`
}
[ $# = 0 ] && { echo "Usage: tolower item1 item2 ..."; exit; }
for item in $*
do
[ "`dirname $item`" != "`basename $item`" ] && {
[ -d $item ] && {
for subitem in `ls $item`
do
tolower $item/$subitem
done
}
convert $item
}
doneYou can swap the paramters of tr to convert to uppercases.
1 | mv $1 `dirname $1`/`basename $1 | tr 'abcdefghijklmnopqrstuvwxyz'` 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' |
mv $1 `dirname $1`/`basename $1 | tr 'abcdefghijklmnopqrstuvwxyz'` 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
At least 1 parameter is required otherwise the message of usage will be printed. This is the same of using if then; done but this is more elegant and concise. See this post for compound command.
1 | [ $# = 0 ] && { echo "Usage: tolower item1 item2 ..."; exit; } |
[ $# = 0 ] && { echo "Usage: tolower item1 item2 ..."; exit; }[ -d $item ] checks for directories and the recursive calls are:
1 2 3 4 | for subitem in `ls $item` do tolower $item/$subitem done |
for subitem in `ls $item` do tolower $item/$subitem done
–EOF (The Ultimate Computing & Technology Blog) —
GD Star Rating
loading...
240 wordsloading...
Last Post: How to Show System Environment Variables using VBScript/JScript under Window Scripting Host
Next Post: BASH Script to Solve 8 Queen Problem
