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Actual exam question from RedHat's EX200

Question #: 30
Topic #: 1

SIMULATION -
Create a Shared Directory.
Create a shared directory /home/admins, make it has the following characteristics:
/home/admins belongs to group adminuser
This directory can be read and written by members of group adminuser Any files created in /home/ admin, group automatically set as adminuser.

Show Suggested Answer

Suggested Answer: See explanation below.
mkdir /home/admins
chgrp -R adminuser /home/admins
chmodg+w /home/admins
chmodg+s /home/admins

by dax at Dec. 18, 2020, 8:40 a.m.

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jahute27

Highly Voted 3 years, 2 months ago

mkdir -p /home/admins groupadd adminuser chown :adminuser /home/admins setfacl -m g:adminuser:rwx /home/admins chmod g+s /home/admins/

upvoted 8 times

Lazylinux

3 months, 3 weeks ago

you answer is correct i.e. however you missed on -R as by using -R you are ensuring that permissions are applied recursively - down the driectory. However no NEED to use setfacl at all in this case as this command will suffice chmod g+rwxs or if you like chmod g=rwxs will suffice. You only need to use setfacl if there is speciall requirement i.e. granting access to another user or group that are not members of the group adminuser => lets say you want to allow user max read only in this case setfacl -m u:max:r--

upvoted 1 times

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sazz82

1 year, 7 months ago

chmod -R g+s /home/admins/ > what about this option ?

upvoted 1 times

Lazylinux

3 months, 3 weeks ago

U are correct just read my above point

upvoted 1 times

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Brabus

1 year, 10 months ago

This directory can be read and written, so setfacl -m g:adminuser:rw- /home/admins

upvoted 3 times

Lazylinux

3 months, 3 weeks ago

Incorrect, you MUST assign the execute permission too on directory as without x - even if you have RW you still will NOT be able to access the directory and hence access denied, you can try it to confirm your doubt => so setfacl -m g:adminuser:rwx /home/admins is correct

upvoted 1 times

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kitkat

Most Recent 2 years, 5 months ago

mkdir -p /home/admins cd /home chown :adminuser /home/admins chmod g+rws/home/admins --to test useradd -g adminuser test su - test cd /home/admins touch testfile ls -ltr

upvoted 4 times

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Javier_Cruz

2 years, 7 months ago

groupadd adminuser mkdir /home/admins chown :adminuser /home/admins chmod 770 /home/admins chmod g+s /home/admins With any user in adminuser group touch /home/admins/file ls -ltr /home/admins -rw-r--r--. 1 test1 adminuser 0 Apr 9 20:19 file

upvoted 1 times

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kenkct

2 years, 9 months ago

$ sudo su # mkdir -p /home/admins # groupadd adminuser # chown :adminuser /home/admins # chmod g+rws /home/admins # getfacl /home/admins

upvoted 3 times

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kenkct

2 years, 9 months ago

$ sudo su # mkdir /home/admins # groupadd adminuser # chown :adminuser /home/admins # chmod g+rws /home/admins # getfacl /home/admins

upvoted 1 times

Lazylinux

3 months, 3 weeks ago

Incorrect as you had missed on the x permission on the directory - users will get access denied with out the x regardless if they have rw or NOT => so should be chmod g+rwxs

upvoted 1 times

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Harvard

3 years, 5 months ago

why not use chown :adminuser /admins as opposed to chgrp?

upvoted 2 times

tester27

2 years, 6 months ago

they're the same

upvoted 1 times

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blackmrx

3 years, 5 months ago

mkdir /home/admins groupadd adminuser chgrp adminuser /home/admins chmod g=rwx /home/admins chmod g+s /home/admins To test for it : useradd -g adminuser test sudo -u test touch /home/admins/test sudo -u test ls

upvoted 3 times

kitkat

2 years, 5 months ago

question only talks about read, write and there is no mention of execute. Why were we giving execute permission ?

upvoted 2 times

Dewitts68

1 year, 6 months ago

execute permissions on a folder = Can Access

upvoted 1 times

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dax

3 years, 11 months ago

mkdir /home/admins groupadd adminuser ls -ld /home/admins chgrp adminuser /home/admins ls -ld /home/admins chmod g+w /home/admins

upvoted 3 times

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