Wave a flag

題目圖示

Hint

1. This program will only work in the webshell or another Linux computer.

2. To get the file accessible in your shell, enter the following in the Terminal prompt: $ wget https://mercury.picoctf.net/static/fc1d77192c544314efece5dd309092e3/warm

3. Run this program by entering the following in the Terminal prompt: $ ./warm, but you'll first have to make it executable with $ chmod +x warm

4. -h and --help are the most common arguments to give to programs to get more information from them!

5. Not every program implements help features like -h and --help.

解題步驟

1. wget https://mercury.picoctf.net/static/fc1d77192c544314efece5dd309092e3/warm
2. chmod +x warm
3. 執行 ./warm 後，您將在終端機中獲得 Hello user! Pass me a -h to learn what I can do!
4. 然後按照指示執行 ./warm -h
5. Get the flag ~

Useful Stuffs

1. https://www.runoob.com/linux/linux-comm-chmod.html

2. Linux command: -h