User permission to a particular command
82669
Is it possible to give sudo access to only a particular command?
125358
Content type permission to specific users
69535
How to add a ssh user who only has permissions to access specific folder?
62984
Change Folder Permissions
21563
How to change permissions for a folder and its subfolders/files in one step?
107337
Restricting a user to a certain directory on SSH login
91100
How can I get a command block?
73485
Unix: Is there a way to "copy" file or directory permissions?
103998
How to manage users access to shared folders from the command line?
44012
Can files be created with permissions set on the command line?
39794
Create an SSH user who only has permission to access specific folders
149272
Can I allow a standard user to execute only certain sets of command in terminal?
44231
Remove sudo privileges from a user (without deleting the user)
73279
System App Permissions
150893
Getting warning file permission with root user
109276
Check file permissions
130030
Run a specific sudo command without a password in Ubuntu 13.10