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The data part always keeps the last committed version. The undo log enables the recreation of older versions of data. The main inherent limitation of this latter approach is that when there are update-intensive workloads, the undo log part runs out of space and then transactions are aborted as they cannot be given their snapshot.
Mongoose is a JavaScript object-oriented programming library that creates a connection between MongoDB and the Node.js JavaScript runtime environment. [ 1 ] [ 2 ] It provides a straightforward, schema-based solution to model application data.
Just as the who command lists the users who are logged in to the local Unix system, rwho lists those users who are logged into all multi-user Unix systems on the local network. [18] rwho's daemon, rwhod, maintains a database of the status of Unix systems on the local network. The daemon and its database are also used by the ruptime program. [19]
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Users can log into websites with multiple social identities allowing them to better control their online identity. [5] Registration Data Many websites use the profile data returned from social login instead of having users manually enter their PII (Personally Identifiable Information) into web forms. This can potentially speed up the ...
Command (computing), a statement in a computer language; command (Unix), a Unix command; COMMAND.COM, the default operating system shell and command-line interpreter for DOS; Command key, a modifier key on Apple Macintosh computer keyboards; Command pattern, a software design pattern in which objects represent actions; Voice command, in speech ...
(Left) command-option-* triggers a non-catchable hardware reset thereby hard rebooting the computer. (Contrary to Ctrl+Alt+Del on a PC compatible computer which triggers only a software reset.) On the NeXT ADB keyboard, the Command keys were replaced by keys labeled help and the Command key morphed into a wide Command bar in front of the space ...
If the above is stored in the executable file ./check, the shell command ./check " 1 ) evil" will attempt to execute the injected shell command evil instead of comparing the argument with the constant one. Here, the code under attack is the code that is trying to check the parameter, the very code that might have been trying to validate the ...