From Wikipedia, the free encyclopedia.
Root can refer to the base of the file system's directory structure. See Root directory.
In Unix style computer operating systems, root is the name of the user who has all rights on permissions in all modes (single or multi user). Normally this is the administrator's account. The user root can do many things an ordinary user cannot, such as changing the ownership of files and binding to a server port. Generally, it is not good practice for anyone to use root as their normal user account, because simple typographic errors can cause major damage to the system. It is recommended to create a normal user account instead and then use the su command to switch when necessary.
If a person 'has root access' it means that they are able to act as the administrator of that computer.
In a tree data type, the root is the node in the tree which has no parent node.
