Part time CTF Player learn every day!!
🌠 I Love Hoshimachi Suisei!! 🌠
🌠 I Love Hoshimachi Suisei!! 🌠

OverTheWire Utumno Level 0 tutorial!!

overthewire utumno walkthrough ctf binary exploitation

Published on 07 Sep 2023

ssh utumno0@utumno.labs.overthewire.org -p 2227
# password: utumno0

Task

Log into the Utumno game using SSH. Your goal for this first level is simply to connect successfully to the remote machine.

SSH (Secure Shell Protocol) lets you connect securely to a remote Linux machine.
The syntax is:
```
ssh <username>@<server> -p <port>
```
Here:
- utumno0 is the username.
- utumno.labs.overthewire.org is the host.
- -p 2227 specifies the custom port (default SSH is 22).
On Windows: use WSL, PowerShell, or PuTTY.
On Linux/macOS: just open the built-in Terminal.
Once connected, you’ll land in the user’s home directory.

Further reading:

Open a terminal.
Run the SSH command:
```
ssh utumno0@utumno.labs.overthewire.org -p 2227
```
Why? This starts a secure session as user utumno0 on port 2227.
Accept the host key (first-time prompt):
```
The authenticity of host ... can't be established.
Are you sure you want to continue connecting (yes/no/[fingerprint])?
```
Type yes. Why? SSH stores the server’s fingerprint in ~/.ssh/known_hosts for future verification.
Enter the password (hidden input):
```
utumno0
```
Why? SSH doesn’t echo characters for security.

Verify you’re logged in as utumno0 — the shell prompt should look like:

utumno0@utumno:~$

Optionally confirm:

whoami   # should print: utumno0
pwd      # should print: /home/utumno0 (or similar)

Troubleshooting quick tips

ssh: connect to host ... port 2227: Connection timed out → Check your internet/firewall; don’t forget -p 2227.
Permission denied → Double-check username (utumno0) and password (utumno0).
Host key verification failed → Remove old entry in ~/.ssh/known_hosts then retry.

Congrats 🎉 You’re now logged in as utumno0 and ready for the next level.

Until next time — Otsumachi!! 💖☄️✨

Cinema