How do I block a specific user in Linux?
How to disable a specific command for a specific user in Linux
- Find the absolute path to the command to be controlled: # which mkdir /bin/mkdir.
- Display the current ACL for that program:
- Add an access control rule for the user john:
- View the updated access control:
- Test the setting:
How to block a specific command in Linux?
By default, it holds a whitelist of allowed commands, but it can be easily configured to prohibit user from using a specific command. This configuration (default conf /etc/lshell.conf) prohibits user foo from using mkdir: In order to configure a user account to use lshell by default, you must: 3 levels of granularity: user, group, all.
How to restrict a user from executing particular command?
So expect a problem ticket from that user saying ‘I cannot run “X” ‘ In the user’s home directory change .profile to be owned by root, with 644 protections. There are other slightly more realistic possibilities using file ACL’s on /usr/bin/rm to block the user from executing that file. If you understand ACL’s and your system supports them.
How to disable a specific command in Linux?
The steps are: 1. Find the absolute path to the command to be controlled: 2. Display the current ACL for that program: The user, group, and other entries correspond to the traditional file access permissions managed by the chmod command. 3. Add an access control rule for the user john: 4. View the updated access control:
How to block or disable normal user logins in Linux?
What ever the situations is, it is a good idea to prevent non-root (normal) users from connecting to the system. In this article, we will describe how to block non-root users logins using /etc/nologin file as well as a nologin shell in Linux. We will look at how to set a message that explains to users what is actually happening.