Restrict su access to Privileged Accounts in Linux

1. How do I restrict su access?
2. How do I restrict permissions in Linux?
3. How do I disable sudo su for users in Sudoers configuration file?
4. How do I disable sudo su?
5. How do I give SU access in Linux?
6. How can I su user without password?
7. How do I restrict root access in Linux?
8. How do I restrict login in Linux?
9. How do I restrict users to access their home directory in Linux?
10. How do I fix Sudo permissions?
11. How do I enable sudo su?
12. How do I configure Sudoers?

How do I restrict su access?

How to Restrict su Access to a User Only by PAM in Linux

1. Create a new group for oracle that is allowed to run su: # groupadd adminmembers.
2. Add users (oracle) to the group: # usermod -G adminmembers oracle.
3. Create the /etc/security/su-adminmembers-access file and add 'admin' to it: ...
4. Add following rules to /etc/pam.d/su configuration file:

How do I restrict permissions in Linux?

Limit User's Access To The Linux System Using Restricted Shell. First, create a symlink called rbash from Bash as shown below. The following commands should be run as root user. Next, create an user called "ostechnix" with rbash as his/her default login shell.

How do I disable sudo su for users in Sudoers configuration file?

How to disable “sudo su” for users in sudoers configuration file

1. Login as root account into the server.
2. Backup the /etc/sudoers config file. # cp -p /etc/sudoers /etc/sudoers.ORIG.
3. Edit the /etc/sudoers config file. # visudo -f /etc/sudoers. From: ...
4. Then save the file.
5. Please do the same to other user account in sudo.

How do I disable sudo su?

Just use sudo su to login as root from a user in the sudo group. If you want to disable this, you have to set a root passwd, then remove the other user from the sudo group. This will require you to su - root to login as root whenever root privileges are needed.

How do I give SU access in Linux?

1. In Linux, the su command (switch user) is used to run a command as a different user. ...
2. To display a list of commands, enter the following: su –h.
3. To switch the logged-in user in this terminal window, enter the following: su –l [other_user]

How can I su user without password?

You can also su to another user without requiring a password by making some changes in the sudoers file. In this case, the user (for example aaronk) who will switch to another user account (for example postgres) should be in the sudoers file or in the sudo group to be able to invoke the sudo command.

How do I restrict root access in Linux?

The simplest method to disable root user login is to change its shell from /bin/bash or /bin/bash (or any other shell that permits user login) to /sbin/nologin , in the /etc/passwd file, which you can open for editing using any of your favorite command line editors as shown. Save the file and close it.

How do I restrict login in Linux?

UNIX / Linux : How to lock or disable an user account

1. To lock a users account use the command usermod -L or passwd -l. ...
2. The commands passwd -l and usermod -L are ineffcient when it comes to disable/lock user accounts. ...
3. Expiring an account via use of the 8th field in /etc/shadow (using “chage -E”) will block all access methods that use PAM to authenticate a user.

How do I restrict users to access their home directory in Linux?

Restrict Linux users to their home directories only

1. Changing directories with cd.
2. Setting or unsetting the values of SHELL, PATH, ENV, or BASH_ENV.
3. Specifying command names containing /
4. Specifying a file name containing a / as an argument to the . ...
5. Specifying a filename containing a slash as an argument to the -p option to the hash builtin command.

How do I fix Sudo permissions?

Some advice online said to run chown root:root /usr/bin/sudo chmod 4755 /usr/bin/sudo .
...
So your steps will be like the following:

1. boot from a live CD / Pendrive.
2. check whether your disk was already automounted (and where to). If not, mount it (see below)
3. use sudo chmod 0755 <path> to adjust the permissions.

How do I enable sudo su?

To enable sudo for your user ID on RHEL, add your user ID to the wheel group:

1. Become root by running su.
2. Run usermod -aG wheel your_user_id.
3. Log out and back in again.

How do I configure Sudoers?

We can configure who can use sudo commands by editing the /etc/sudoers file, or by adding configuration to the /etc/sudoers. d directory. To edit the sudoers file, we should always use the visudo command. This uses your default editor to edit the sudoers configuration.