Category: ssh / rsync

GNU Linux ubuntu ssh root login not possible
21.02.2025

ubuntu managed to disable root login, no matter what is set in /etc/ssh/sshd_config so all ssh-copy-id root@123.123.123.123 fails the only possible way to login straight as root (only on test systems!) is to 1. manually create mkdir /root/.ssh/ touch /root/.ssh/authorized_keys […]

GNU Linux ssh magic tricks – access devices without opening firewall port – reverse ssh proxy tunnel – open source admin’s vpn and teamviewer replacement (no open ports needed) – how to use ssh into a network behind router-firewall and forward port of any device to localhost
01.04.2024

scroll down to: “how to access user-dev-admin’s home network boxes from anywhere via reverse-ssh-tunnel! :D” ssh tunnel remote deviceD’s port access a device’s port that is only available via a specific machine 😀 or in other words: ssh-tunnel port of […]

gnu linux bash – ssh login as different user
12.01.2020

situation: one is userA but wants to ssh login to server with ipv4: 123.123.123.123 via userB (dedicated user for that server/task). so what one does is: make sure one can login as userB than as userA: userA: ssh -v -i […]

how to qnap + ssh public private key auth setup
30.08.2016

0. generate keys on client ssh-keygen -t ed25519 -C “comment for what this keypair is for” when asked for passphrase, do not enter anything… cat .ssh/id_ed25519.pub # copy this line ssh-ed25519 ALOTOFRANDOMNUMBERSANDLETTERSMopLe comment # ssh into qnap ssh -v admin@192.168.0.123 […]