Etc shadow file permissions

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See bugzilla. It seems you should just get rid of it having root entirely already. Nowadays since version 4. To see this feature in action, access a root shell and run following commands. In Ubuntu Linux, by default root account is disabled. If you are following tutorial on Ubuntu Linux, access a super user shell and run following commands.

But when we performed the same action from a root user or super user account, shell allowed to it. This security feature keeps encrypted passwords safe from unauthorized users and password cracking programs. In both files, this field represents login name and stores the exactly same information. When a new user account is created, both files are updated simultaneously.

This field stores actual user password in encrypted form. For encryption it uses SHA algorithm. In this algorithm, a random salt is mixed with original password before encryption. If two or more users have selected the same password, due to this feature, their encrypted passwords will be different. Linux does not support blank password in login process. Any user or service which does not have a valid password or have a blank password is not allowed to login.

By setting a value other than an encrypted password, this field can be used to control the user login. For example, if the value! Both characters! The difference between both characters is that, the first character, the exclamation sign! If require, a user account can be unlocked by setting a password in this field through passwd command.

Create a free Team What is Teams? Learn more. Asked 5 years, 3 months ago. Active 5 years, 3 months ago. Viewed 7k times. I am using Red Hat Enterprise Linux and here are the details: uname -a 3. Improve this question. Add a comment. Active Oldest Votes. That's normal. Improve this answer. Community Bot 1.