Can I dereference a wildcard in a command?

wjtaylor · 03-31-2011, 09:36 AM

Can I dereference a wildcard in a command?

For example if I want to create a file with the md5 hashes of compressed versions of files in a directory...

gzip -rc ./source/* | md5sum -b - >> hash.txt

This above command gives me a file with one hash for the filename *

I would like to get a file with the hashes and filenames for every file gzip compresses.

Do I have to script a foreach routine for this?

Thanks,
WT

jlinkels · 03-31-2011, 10:19 AM

I don't quite understand what your command is, but the code
snippet below cycles thru all your files gzips each file and
calculates the md5sum. Filename and md5sum are written to a file.

Code:

for fn in $(ls ./source/*)
do
  gzip $fn
  echo -e $fn >> myfile
  md5sum $fn.gz >> myfile
done

jlinkels