How do I restrict a root user in Linux?

How do I restrict a root user?

From the menu bar in Directory Utility:

  1. Choose Edit > Enable Root User, then enter the password that you want to use for the root user.
  2. Or choose Edit > Disable Root User.

How do I restrict a login in Linux?

Simply use chsh (change shell) command to change the users shell in /etc/passwd file from something like /bin/bash or /bin/sh to /sbin/nologin meaning refuse a login.

How do I prevent root from reading a file?

Yes, there are ways to prevent root from overwriting files.

  1. Set the immutable bit with chattr ( +i sets, -i unsets). Requires root access, works only on ext2/ext3 (presumably ext4 too), but is otherwise practical.
  2. Don’t run apps as root. No root privs, no overwriting files. …
  3. Unmount the filesystem. …
  4. Turn off computer.

How do you set no in PermitRootLogin?

Procedure

  1. To enable remote root login, enter the following command: /etc/ssh/sshd_config: PermitRootLogin yes #enabled.
  2. To disable remote root login, enter the following command: /etc/ssh/sshd_config: PermitRootLogin no #disabled.

How do you use a restricted shell to limit user access to a Linux system?

How to use Restricted Shell to limit user access to a Linux…

  1. Using the cd command.
  2. Modifying the values of $PATH, $SHELL, $BASH_ENV, or $ENV.
  3. Executing programs that contain a /
  4. Redirecting output using >, >|, <>, >&, &>, and >>
  5. Get out of restricted mode within scripts.
  6. Turn off restricted mode.
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How do I restrict users in Ubuntu?

Ubuntu – How to restrict program access to other users

  1. Create a group webusers.
  2. change the rights of the firefox binary to 750 (root:rwx, webusers:r-x) and the ownership to root:webusers.
  3. add all users who should be allowed to use firefox to the group webusers.

What is the command to deny all users access from the network in Linux?

The realm deny command simply denies access to all users within the domain. Use this command with the –all option.

Can root user read all files Linux?

In Unix and Linux systems, there is a special user called “root.” The root user is the super user—it can read, write, and delete any file. … Although the root user can read, write, and delete (almost) any file, it cannot execute just any file.

How does Linux prevent system file modification?

The immutable flag is an extended file system attribute, and can be set on both files and directories. Once the immutable flag is set the the file or directory cannot be modified, renamed or deleted without removing the immutable flag first. The immutable flag can be set or unset using the chattr command.