Linux-Shell Shell continually updated skills several ways to judge the string contains relations

Linux remove the four methods of M ^

The first method: 
CAT -A filename characters can be seen in the off-membered ^ Windows M 
to remove him, with the following command simple: 
the dos2unix filename 

second method: 
Sed -i 'S / ^ M // G 'filename 
# Note: ^ M input mode is Ctrl + v, + and the Ctrl M 
 
third method: 
#vi filename 
: . 1, $ S / M ^ // G 
^ M input method: Ctrl + V, Ctrl + M 
 
of four methods: 
CAT filename | TR -d '/ r'> newfile 
# ^ available M / R & lt instead of
 

 

Several methods comprising determining Shell string Relationship

https://www.cnblogs.com/AndyStudy/p/6064834.html

 

Vi / Vim using the tips, how to eliminate the highlighted keyword search

https://blog.csdn.net/shaoshaoh/article/details/1694451