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I verified I'm a member of root:

user_me@host1:~$ sudo useradd -G root user_me
useradd: user 'user_me' already exists

However, I can't cd to /root/testing from my user:

user_me@host1:~$ cd /root/testing
-bash: cd: /root/testing: Permission denied

If I sudo su - into root, I can verify that the folder I'm trying to cd into is owned by root, and has appropriate permissions.

user_me@host1:~$ sudo su -
Last login: Tue Sep 22 00:23:07 CDT 2015 on pts/1
[root@host1 ~]# ll | grep testing
drwxrwxr-x  2 root root      135 Sep 22 00:20 testing
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  • 3
    The first command did not verify what you claim it does, instead please provide the output of id user_me .
    – galaxy
    Sep 22, 2015 at 7:46
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    You;ve shown that the testing directory (please don't call it a folder! This is not windows) is accessible, however you've not shown that the same is true for /root.
    – wurtel
    Sep 22, 2015 at 9:10

2 Answers 2

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Because you need the x bit set on all descending directories in the tree, to the target one, to be able to cwd through'em. I suppose /root hasn't one for the root group, it's probably 0700.

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    Agree. If it won't work provice ls -la output.
    – Mateusz Pacek
    Sep 22, 2015 at 14:12
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For cheking own groups your need use command:

gropus *username*

For access in directory your need set bit x in permition group

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