# finger > [!note] > Adapted from [slyth11907 / Cheatsheets / Cheatsheet_CTF.txt](https://github.com/slyth11907/Cheatsheets/blob/master/Cheatsheet_CTF.txt). Check if a user account exits on a given host: ```bash finger $USER@$IP_ADDRESS ``` This obviously requires finger to be running and a list of users to try.