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Mocket App(Summer `18)

Mocket is an android application helping users to memorize words. Please visit Github for source code. Total code implementation: Java files > ...

Shells

Shell is a program taking commands from a keyboard and giving them to operating system. Below are three popular shells on Linux. bash Bourne ...

Virtual Consoles

Virtual Consoles enable multi-user logins on a single machine. For example, you can login with your account and also as a root.   By ...

Down Call vs. Up Call

Down Call User code(unprivileged) enters to kernel with trap(interrupt). Up Call Kernel(privileged) enters to user code with IPC(Interprocess ...