Ever wondered how to increase max open files limit in Debian? Edit limits.conf: # vi /etc/security/limits.conf Format of limits.conf file: domain type item value Insert or adjust the following entries to fit your requirements for system wide soft/hard open files limit (nofile). Soft is like a warning, hard is a real Read more…
Warning: Remember the ssh port you’ve chosen, otherwise you’ll no longer be able to connect! If using a firewall be sure to open/forward the newly set ssh port! Otherwise you’ll also be locked out! Change the ssh listen port from default (22/TCP) to something random Open /etc/ssh/sshd_config and change: #Port Read more…
Be sure to already have a working public/private key ssh login setup. Otherwise you’ll be locked out after activating this changes! Change the following config parameters in /etc/ssh/sshd_config to read as: ChallengeResponseAuthentication no PasswordAuthentication no UsePAM no Restart sshd. Have fun. Stay more secure. Is your SSHd listening on the default port Read more…