Remove carriage return in Unix

Question

What is the simplest way to remove all the carriage returns \\r from a file in Unix?

Answer 1

Though it's a older post, recently I came across with same problem. As I had all the files to rename inside /tmp/blah_dir/ as each file in this directory had "/r" trailing character ( showing "?" at end of file), so doing it script way was only I could think of.

I wanted to save final file with same name (without trailing any character). With sed, problem was the output filename which I was needed to mention something else ( which I didn't want).

I tried other options as suggested here (not considered dos2unix because of some limitations) but didn't work.

I tried with "awk" finally which worked where I used "\r" as delimiter and taken the first part:

trick is:

echo ${filename}|awk -F"\r" '{print $1}'

Below script snippet I used ( where I had all file had "\r" as trailing character at path /tmp/blah_dir/) to fix my issue:

cd /tmp/blah_dir/
for i in `ls`
  do
    mv   $i     $(echo $i | awk -F"\r" '{print $1}')
done

Note: This example is not very exact though close to what I worked (Mentioning here just to give the better idea about what I did)