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- Cloud

Managing Permissions and ACLs in SUSE Linux Enterprise
In this hands-on lab, we will be looking at user permissions and access control lists (ACLs). It is important to understand the effects permissions and ACLs can have on system security.

Lab Info
Table of Contents
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Challenge
Correct the Issue with the `devuser` Being Able to Delete the `cloud_user`'s File Located in `/shareddata`
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Verify the issue as the
cloud_user
:cd /shareddata touch examplefile
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Switch to the
devuser
:su devuser (password is P@ssw0rd) rm ./examplefile exit
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As the
cloud_user
, check the permissions on the/shareddata
folder:ls -l /
Output:
d---rws--- root collab shareddata
Note that on the
shareddata
directory, there is no sticky bit set, but the GID is set 'denoted by the s'. -
Set the sticky bit as
cloud_user
:sudo -i chmod 3070 /shareddata
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Repeat the file create as
cloud_user
and then try to remove the file asdevuser
to verify it is working as intended.
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Challenge
Correct the Issue that Is Preventing `testuser` from Being Able to Write to `/home/cloud_user/file`
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Verify the issue as the
cloud_user
:cd ~/ su testuser echo 'testing' >> file exit
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Check the ACL on the file:
getfacl file
Note the mask and the effective permissions.
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Correct the mask as the
cloud_user
:setfacl -m m::rwx file
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Verify the issue has been corrected:
su testuser echo 'testing' >> file cat file exit
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About the author
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