Linux Nobody user what is nobody user introduction

What is the Linux nobody user

1, the Windows system will automatically establish some user accounts after installation, in the Linux system also has some user accounts in the system after the installation of the same as the Windows system in the built-in account.

2, they are used to accomplish specific tasks, such as nobody and FTP, we visit the Www.111cn.net Web page program, the official website of the server is to let customers log in as nobody (equivalent to the anonymous account in the Windows system); When we anonymously access FTP, User FTP or nobody is used.

3, first of all, nobody is an ordinary user, not privileged users. The ' purpose ' of using the nobody username is to allow anyone to log on to the system, but its UID and GID do not provide any privileges, that is, the UID and GID can access only files that everyone can read and write to.
4, second, many systems are routinely created by default to create a nobody, as far as possible ' limit its permissions to the minimum ', when the server outward service, may let the client as nobody login.

5, nobody is a common account, because the default login shell is '/sbin/nologin ', so this user can not login directly to the system, that is, hackers are very difficult to connect to your server through the vulnerability to do damage. In addition, the user's permissions are also configured very low. Therefore, there is a relatively high security. Everything is given only to the least privilege. This is the meaning of nobody existence.