usually in order to remove the ^M from file we do
dos2unix test.txt test.txt
tr -d '\r' < old.file > new.file
but this approach insist to create new file
if we do not want to create another file then the solution is: example of perl one liner
perl -pi -e 's/^M//g' file1
I tried it on Solaris but for unclear reasons, the ^M still exist in the file?
please advice what its wrong here
Perl needs a \r as well.
perl -pi -e 's/^M//g' file1
^^ - should be \r
Although actually, you probably just want to stick with line endings.
perl -pi -e 's,\r\n,\n,g' file1
Although actually - you don't need perl for this. sed is perfectly capable:
sed -i.bak -e 's,\r\n$,\n,g' file1
sed doesn't have a -i option and doesn't support \r and sed pattern space (any implementation) don't contain \n (you'd need s/^M$// where ^M would be a CR character).
Mar 16, 2015 at 15:09
^M shown there is 1 (special) caracter, displayed as ^M in vi (or with cat -v), but entered with: ctrl + v ctrl + m
Mar 16, 2015 at 16:51
You need to use \r, not ^M to match carriage return characters. ^M has removed all M characters at the beginning of the line, so you may want to check your file is still OK...
^M? It needs to be one single control character, not two characters^andM.