How to Restrict SSH Access for User with LShell (Limited Shell)

1. How do you enforce restrictions on users shell?
2. How can I restrict the normal user to run only limited set of commands in Linux?
3. How do I limit user access in Linux?
4. What is Lshell?
5. How do I restrict users to access their home directory in Linux?
6. How do I restrict a user to a specific directory?
7. How do I restrict a user to run a command using sudo?
8. How do I give access to users Ifconfig command?
9. How do I restrict a reboot in Linux?
10. How do I see users in Linux?
11. What is Rbash in Linux?
12. What is the capacity of M shell?
13. What is restricted shell in Linux?

How do you enforce restrictions on users shell?

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.

How can I restrict the normal user to run only limited set of commands in Linux?

However if you only want to allow the user to run several commands, here is a better solution:

1. Change the user shell to restricted bash chsh -s /bin/rbash <username>
2. Create a bin directory under the user home directory sudo mkdir /home/<username>/bin sudo chmod 755 /home/<username>/bin.

How do I limit user access 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.

What is Lshell?

lshell is a shell coded in Python, that lets you restrict a user's environment to limited sets of commands, choose to enable/disable any command over SSH (e.g. SCP, SFTP, rsync, etc.), log user's commands, implement timing restriction, and more.

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 restrict a user to a specific directory?

Create a new group to add all users inside this group.

1. sudo groupadd restriction.
2. sudo useradd -g restriction username.
3. sudo usermod -g restriction username.
4. Match user username ChrootDirectory /path/to/folder ForceCommand internal-sftp AllowTcpForwarding no X11Forwarding no.
5. sftp username@IP_ADDRESS.

How do I restrict a user to run a command using sudo?

Specify the user in /etc/sudoers as having permission to execute /usr/sbin/sudo . This will allow them to execute the sudo command, but they will have no permissions to run any other commands.

How do I give access to users Ifconfig command?

2 Answers. It will grant root privilege for execution of this executable to anyone. Of course, you need to have root access to run the chmod. You don't need to use sudo to run the ifconfig command, just make sure that the /sbin is on your PATH .

How do I restrict a reboot in Linux?

The easiest way to disable shutdown and reboot commands using the /etc/sudoers file, here you can specify a user (tecmint) or group (developers) which are not allowed to execute these commands. Add these lines to Command Aliases section. Now try to execute shutdown and reboot commands as normail user (tecmint).

How do I see users in Linux?

How to List Users in Linux

1. Get a List of All Users using the /etc/passwd File.
2. Get a List of all Users using the getent Command.
3. Check whether a user exists in the Linux system.
4. System and Normal Users.

What is Rbash in Linux?

What is rbash? The Restricted Shell is a Linux Shell that restrict some of the features of bash shell, and is very clear from the name. The restriction is well implemented for the command as well as script running in restricted shell. It provides an additional layer for security to bash shell in Linux.

What is the capacity of M shell?

Questions and Answers

What is restricted shell in Linux?

6.10 The Restricted Shell

A restricted shell is used to set up an environment more controlled than the standard shell. A restricted shell behaves identically to bash with the exception that the following are disallowed or not performed: Changing directories with the cd builtin.