linux权限组

Question

I am trying to setup my webserver so that one group will have access to the files. Apache and every user that needs to edit the files will be part of this group. So I've set all the files to have the group psacln. I've added psacln to my groups. But it still won't let me view the files:

[tom@166 httpdocs]$ whoami
tom
[tom@166 httpdocs]$ groups tom
tom : tom adm wheel apache psacln andy
[tom@166 httpdocs]$ ls -al
ls: .: Permission denied
[tom@166 httpdocs]$ sudo ls -al
total 92
d---rwx--- 14 andy   psacln 4096 Jul 22 17:51 .
drwxrwxr-x 16 apache apache 4096 Jul 21 09:29 ..
d---rwx---  4 andy   psacln 4096 Jul 21 09:26 backend
d---rwx---  3 andy   psacln 4096 Jul 22 15:21 core
d---rwx---  5 andy   psacln 4096 Jul 21 09:26 css
...

Answer 1

可能需要注意的一件事是，当您更改用户的组成员身份时，您将不得不退出并重新登录（即，当您登录时组成员身份将生效，否则通常不会更改）。

Answer 2

您可以登录和注销以使组更改生效，或者使用newgrp命令更改“活动”组也可以为您执行此操作。