Similar to the third challenge, we run the initial command
$ exec /challenge/run
This outputs a message that tells us we should navigate to the /etc/apt/sources.list.d
We run the command to change our current working directory to the specified directory and then run the execution command again.
$ cd /usr/share/zoneinfo/posix/Asia
$ exec /challenge/run
We get the flag pwn.college{8aLqhdiQagrCZXa8j7dbWS-wiQU.ddDN1QDL3kTO0czW}