Allow access for all users to a folder in a server

1.All users on the server had access to the directory /home/shared2/ , Now, They do not have access anymore. I don't know why, Please - Add permissions to ALL users on NETMPIRE server to access /home/shared2/
error:
/bin/ls: .: Permission denied

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Solution:
First create a group and add all the usernames under that group
and
set the permission of the specified folder to 2755
2755: for security reasons
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