13 min read
SSH keys done right: Ed25519 setup and login without a password
Create an Ed25519 key with ssh-keygen, install it with ssh-copy-id or by hand, fix authorized_keys permissions, load ssh-agent, then turn off password logins.
Security
Posts about Security, newest first.
12 min read
Fix "Permission denied (publickey)" and "Host key verification failed"
Fix Permission denied (publickey) and Host key verification failed: read ssh -vvv output, check keys and permissions, sshd logs and known_hosts fingerprints.
11 min read
SSH port forwarding explained: local, remote and dynamic tunnels
SSH port forwarding explained with ssh -L, -R and -D: reach a private database, expose a dev server, run a SOCKS proxy, and keep tunnels alive.