File permissions

[Dick Dowdell]

Hi,

I'm not really a newbie, but I apparently understand less about Linux file
permissions than I thought.

I have a file with the following permissions  -rwxrw-r-x user1:groupa

When logged in as a user in "groupa", why can't I edit that file?

Thanks,
Dick Dowdell
508-498-7919/508-528-4018
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