Linux server is not accessible

Follow below steps to troubleshoot:

Step (1)

Check the network connectivity by ping command

ping <ipaddress>

If server not respond then proceed to check further network check as physical network connections are functioning properly.

Step (2)

Check the SSH service:

Verify SSH is running-
sudo systemctl status sshd

If SSH is not running, start it-
sudo systemctl start sshd

Ensure the firewall is not blocking the SSH or the port you are trying to connect:
Check if SSH is allow
sudo ufw status
Allow SSH if its not
sudo ufw allow ssh

Step(3)

Check server status:
Access via KVM

reboot server if necessary

Step(4)

Check the logs
cd /var/log

SSH log /var/log/auth.log

system log /vsr/log/syslog

Last command before crashing

/vsr/og/dpkg.log

So that will get to know which pacjage istalled.
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