How to remove CONTROL-M characters in UNIX or Linux

Control-m characters will get appended to a file when a file is transferred from windows to UNIX machine. There are multiple ways it can be removed.


Using vi editor:
:%s/^M//g

Using col command:
cat filename | col -b > newfilename

Using sed command:
sed 's/^M//g' filename > newfilename

Using dos2unix comand:
dos2unix filename newfilename

Examples:

volcano@volcano-laptop:~/shellscript/ctrl$ cat -v jsk
hi^M
jsk^M
volcano@volcano-laptop:~/shellscript/ctrl$ cat jsk | col -b > jsk.new
volcano@volcano-laptop:~/shellscript/ctrl$ cat -v jsk.new
hi
jsk
volcano@volcano-laptop:~/shellscript/ctrl$ sed 's/^M//g' jsk > jsk.new2
volcano@volcano-laptop:~/shellscript/ctrl$ cat -v jsk.new2
hi
jsk

Note: Hold the control key and then press v and m to get the control-m character