Disable shell access for user linux

1. How do I disable shell access to users?
2. How to set no login shell in Linux?
3. How to disable ssh user login in Linux?
4. How do I disable a user account in Linux?
5. How do I change permissions on shell script?
6. How do I turn off Enable permissions monitoring?
7. How do I remove file permissions?

How do I disable shell access to users?

Create a new user with no shell access

Linux comes with a /sbin/nologin shell which displays a message 'This account is currently not available', when a user attempt to connect. This is one way to disable the user from access the login shell.

How to set no login shell in Linux?

The nologin shell is located at /sbin/nologin. On some systems, this shell may also be located at /usr/sbin/nologin . Either way, it's the same file and will provide the same function. To set a user's shell to nologin , you can use the usermod command, along with the -s or --shell option, as seen in the syntax below.

How to disable ssh user login in Linux?

Disable SSH Root Access

Open the file '/etc/ssh/sshd_config' in any text editor and search for the string 'PermitRootLogin'. Uncomment the line and if it has any other value, set the value to 'no'. Now try logging in to localhost with user 'root'. It will also show the error 'Permission Denied'.

How do I disable a user account in Linux?

You need to use the usermod command to lock and disable user account. The -L option lock user's password by putting a ! in from of the the encrypted password hash in the /etc/shadow file. To disable user account set expire date to one or 1970-01-01.

How do I change permissions on shell script?

We can provide the executable permission by using the below command, chmod +x filename.sh. chmod (Change Mode) - Using chmod we can change the access permissions to file system objects. +x - It makes the file executable.

How do I turn off Enable permissions monitoring?

To turn off this feature, you can easily control turn off/on the app, and you can choose which app you want to be monitored. open settings > lock screen and security > app permission monitor.

How do I remove file permissions?

To remove world read permission from a file you would type chmod o-r [filename]. To remove group read and execute permission while adding the same permission to world you would type chmod g-rx,o+rx [filename]. To remove all permissions for group and world you would type chmod go= [filename].