Need help writing a renaming script (DDMMYYYY to YYYYMMDD format)
ProgrammingThis forum is for all programming questions.
The question does not have to be directly related to Linux and any language is fair game.
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
I use a regex-rename script (similar to rename found on Slackware) that checks to make sure the number of input files is no greater than the number of output files. For example, your regex might result in two files mapping to the same file, causing the first to be lost.
if [ $# -lt 3 ]; then
echo "$0 [old pattern] [new text] [files...]" 1>&2
# sed -E "s/$old_pattern/$new_text/" #(use for FreeBSD)
sed --posix -r "s/$old_pattern/$new_text/" #(use for GNU)
old_files="$( while [ $# -gt 0 ]; do
done | egrep "$pattern" | sort -u )"
old_count="$( echo "$old_files" | grep -c . )"
if [ "$old_count" -eq 0 ]; then
echo "$0: no files match the given pattern! please check it and try again." 1>&2
new_files="$( echo "$old_files" | revise_name )"
new_count="$( echo "$new_files" | sort -u | grep -c . )"
if [ "$old_count" -gt "$new_count" ]; then
echo "$0: the current pattern would result in the loss of $(($old_count-$new_count)) files! please check it and try again." 1>&2
echo "$old_files" | while read file; do
new_file="$( echo "$file" | revise_name )"
if [ "$new_file" != "$file" ]; then
mv -v "$file" "$new_file"
I name this useful-rename.sh. In your case, you might try