remove ^M characters from file using sed

Question

I have this line inside a file:

ULNET-PA,client_sgcib,broker_keplersecurities
,KEPLER

I try to get rid of that ^M (carriage return) charact

Answer 1

If Perl is an option:

perl -i -pe 's/\r\n$/\n/g' file

-i makes a .bak version of the input file
\r = carriage return
\n = linefeed
$ = end of line
s/foo/bar/g = globally substitute "foo" with "bar"