1. Download and unzip it.
2. After figuring the file inside, I found that in home/User has the bash history and contain 3 password. Find 3 password in order to fix the solution.
3. First password, the picture can be fix by the steghide.
4. Second password, I have to find the password of user wchich can find in etc/shadow.
5. Last password, it is in table.db. View in sqlite3.
6. After that, open the terminal and run openssl enc -aes-256-cbc -salt -d -in flag.txt -out flag.txt.enc -k
7. Get the flag.