How to run the. sh file __linux Linux system

There are two ways to run the. sh file under the Linux system, for example, I have a datelog.sh file in the root directory.

The first (this approach requires the use of chmod to make the file conditional on execution (x): chmod u+x datelog.sh):

1, in any path, enter the absolute path of the file/root/datelog.sh can execute the file (of course, if permission is allowed)

2, CD to the directory of the datelog.sh file, and then execute./datelog.sh

The second (this method does not require the file to have executable permissions can also run): 1, in the file path under SH Plus file name can be, SH datelog.sh

2, in any path, SH plus file path and file name: sh/root/datelog.sh