Remove the ^m symbol from the file in the Linux environment __linux

1. Sed-i-E ' s/^m$//' (filename) such as delete ^m character operation in a.php Sed-i-e ' s/^m$//' a.php

2. Grep-r "^m" a.php View the ' ^m ' character in the a.php file.

The first method:
Cat-a filename can see the faulted Meta characters under Windows ^m
To remove him, the simplest use of the following command:
Dos2unix filename

The second method:
Sed-i ' s/^m//g ' filename
#注意: ^m input is CTRL + V, then CTRL + M

The third method:
#vi filename
: 1,$ s/^m//g
^m Input Method: Ctrl + V, ctrl+m

The fourth method:
#cat filename |tr-d ' \ r ' > NewFile
#^m can be replaced with \ r