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In computing, runas (a compound word, from “run as”) is a command in the Microsoft Windows line of operating systems that allows a user to run specific tools and programs under a different username to the one that was used to logon to a computer interactively. [1]
These may not always be obvious. For example, the ping command may need access to networking privileges that a normal user cannot access; therefore it may be given the setuid flag to ensure that a user who needs to ping another system can do so, even if their account does not have the required privilege for sending packets.
The command su, including the Unix permissions system and the setuid system call, was part of Version 1 Unix.Encrypted passwords appeared in Version 3. [5] The command is available as a separate package for Microsoft Windows as part of the UnxUtils collection of native Win32 ports of common GNU Unix-like utilities.
With these programs, the user is pre-configured to be granted access to specific administrative tasks, but must explicitly authorize applications to run with those privileges. The user enters their own password instead of that of the superuser or some another account. UAC and Authenticate combine these two ideas into one. With these programs ...
A Primary username is the name you created when you first signed up for an AOL account. In the past, AOL offered the ability to create secondary usernames linked to this Primary username, however, as of November 30, 2017, the ability to add or manage additional usernames has been removed.
Regardless of the name, the superuser always has a user ID of 0. The root user can do many things an ordinary user cannot, such as changing the ownership of files and binding to network ports numbered below 1024. The name root may have originated because root is the only user account with permission to modify the root directory of a Unix
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