ssh: connect to host example.com port 22: Connection timed out

SSH can’t reach the server within the timeout period.

Fix 1: Check if the server is reachable

ping example.com
telnet example.com 22

Fix 2: Check if SSH is running on the server

# On the server
sudo systemctl status sshd
sudo systemctl start sshd

Fix 3: Firewall blocking port 22

# Check firewall rules on server
sudo ufw status
sudo ufw allow 22

# Or iptables
sudo iptables -L -n | grep 22

Fix 4: Wrong port

# SSH might be on a non-standard port
ssh -p 2222 user@example.com

Fix 5: Cloud provider security group

If using AWS/GCP/Azure, check that the security group allows inbound TCP on port 22 from your IP.

Related resources

• Linux terminal cheat sheet
• Linux complete guide