How can I change the value of "INI_TEST" from "YES" to "NO" in the setup.ini file by command?

[galaxy@test01 test]$ cat setup.ini
INI_START YES
INI_END YES
INI_TEST YES

Thank u in advance!

If it just one occurrence, then manual changing to NO will help.

Else,
Of if you have a -i option for your sed,

the above command will fail. it seems that the original file will become empty. Can someone explain?

Redirect the output to some other file and then rename it later. Else the read-write operations are being carried out on a single file.
Like I mentioned before, if you have a -i option for your sed, use that for operations like read and write on a single file.

Thanks vino!

It seems that I can't change the value straightly ......
Is there any method to change the value straightly? ( not use sed )

Why cant you change the value manually ? What is it that you are trying and what is the error that you are facing ? Check the permissions et al..

I think it should be as simple as opening the file in your favourite editor and changing the value.