Shell Programming and Scripting

Hello i have question that i want check syntax from my script shell with sh -n filename
but it's not show something even i have wrong syntax in my file. why can this happened or any other way to check it?

i use on header of file :

#!/bin/sh

thx before

I have been use that clue .. but it doesn't happened even my script is wrong ...

---------- Post updated at 11:59 AM ---------- Previous update was at 11:57 AM ----------

I have been use that clue .. but it doesn't happened even my script is wrong ...

like :
sh -n /path/to/scriptfile
Or put set -n at the top of your script.

-n (parse only) does not find all syntax errors.
-x is a real run with echoing after evaluation.

What shell are you using?

What OS are you using?

What is in filename and /path/to/scriptfile?

What is it in those files that you are expecting to produce a syntax error?

1 sh or bash shell

2 linux centos.

3 in that file is scripting, like day_N=`date +%d-%m-%Y`

4 not produce, but i want with this checking can show the error syntax before execute / run that script
ex: day_N=`dateas +%d-%m-%Y` -> that will show error command dateas not found. like that

for detail question : i want to know the error syntax without run that script....

thx

Not finding a command is not a syntax error. Without running the script the shell can't know whether a utility named dateas will be the name of an alias, function, built-in, or utility found through $PATH at the time when the script will get to that point.

Syntax errors are things like a missing fi or then in an if statement or a missing do or done in a while loop.