Level5.
Use "level5" password "what is your name?" to access level5 account and check the hint.
After running level5 program, go to /tmp directory and check the level5.tmp. But the file does not exist. The algorithm of the program that I think is as follows.
Symbolic link was used to solve the problem. If I create level5.tmp file and run level5 program, new contents will be created in level5.tmp Even if the program is terminated and the file is deleted, I will be able to check the contents through the linked file.
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