Adding the apache user to my default group doesn't give apache group access

Question

The whole Linux user:group topic just gives me headaches again.

Situation

I have my document roots (httpdocs) and everything inside chown-ed to a certain user and a certain group, let's say myuser:mygroup.

chown -R myuser:mygroup httpdocs

Now apache doesn't have access to let's say a public images folder. So I add apache to mygroup, for example with:

usermod -a -G mygroup apache

Question

Any file or folder which I chmod to 775 should now give apache write permission, not? Doesn't happen... do I have to reload, restart or else reinitiate something for this to happen or do I still just not get the whole thing.

Answer 1

Did you restart apache after making the change? The groups will only be enumerated for the apache account when apache server is restarted.

Answer 2

Well, I just realized that it works as I described it. Don't know why the lag, maybe I just didn't properly refresh the browser or maybe CentOS reads the group file after every X minutes or who knows. But the scenario as I described it, works.