Shell: Reads the contents of each line of the file and outputs

Writing one:
#!/bin/bash

While Read line
Do
Echo $line
Done < file (files to be read)

Two:


#!/bin/bash

Cat file (file to be read) | While Read line
Do
Echo $line
Done

Three:

For line in ' cat file (files to be read) '
Do
Echo $line
Done

The above three kinds of writing are my excerpt from the Internet, share it together.

http://blog.de3eb.cn/2012/03/shell%E8%AF%BB%E5%8F%96%E6%96%87%E4%BB%B6%E7%9A%84%E6%AF%8F%E4%B8%80%E8%A1%8C%E5% 86%85%e5%ae%b9%e5%b9%b6%e8%be%93%e5%87%ba/

Shell: Reads the contents of each line of the file and outputs