make linux directory writable using bash command t

问题:

I have a directory /webroot in my linux server. Which permission set is 771, that means 1 for others. But I want to make it 773 through java code which like is :

Process p1 = Runtime.getRuntime().exec("chmod 773 /webroot");

But it can not change the permission.

I also capture the error stream which is like as :

chmod: changing permissions of `/webroot/': Operation not permitted 

I saw a nearly related post yesterday, but i could not find the appropriate answer. At this time, what can I do now?

Please any help.

回答1:

I think the error is pretty clear here. What user is your Java code running as? It most likely doesn't have permissions to run chmod on that directory.

Do a ls -l on that directory to see who it is owned by. Make sure that your Java code is running at that same user.