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Alias

An alias is a (usually short) name that the shell translates into another (usually longer) name or command. Aliases allow you to define new ...

Sandbox

“Like all security features, the Application Sandbox is not unbreakable. However, to break out of the Application Sandbox in a properly ...

Dalvik Virtual Machine

  How each process gets an instance of the Dalvik VM When the system boots up, the boot loader loads the kernel into memory and initializes ...

Java Native Interface

Overview JNI allows you to use native code when an application cannot be written entirely in the Java language. The following are typical ...

Useful Websites

CS university rankings by publications http://csrankings.org/ Regular Expression http://www.rexegg.com/regex-quickstart.html Tmux ...

tee command

less command on the picture is used to display information to the terminal one page at a time. less is faster than other command because it ...

File permission

If you type ls -l, you can see file permission like below. First letter indicates if it is a Directory. Next each group of three characters ...

Dead code

Dead code can never be executed (unreachable code), and it only affects dead variables (written, but never read again), that is, irrelevant to ...