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Using PowerShell over SSH, Twenty Years Later
10 days ago
- Microsoft now includes OpenSSH client in Windows 10 and Server 2019+, with SSH server preinstalled in Windows Server 2025.
- To use PowerShell as default shell over SSH, set registry value to PowerShell 7's pwsh.exe and configure sshd subsystem with short names or symlinks.
- Key authentication differs for admin accounts: keys must go to administrators_authorized_keys with strict ACLs, causing common setup issues.
- PowerShell 7 supports remoting over SSH with object pipelines, working across Windows, Linux, and macOS via commands like Enter-PSSession.
- Limitations include lack of WinRM features (e.g., JEA), no profile loading, second-hop problems, and no dynamic key fetching from AD/Entra ID.
- The evolution from 2006 Cygwin kludge to 2026 integrated SSH shows Microsoft's adoption of OpenSSH, enabling cross-platform, secure remote management.
Show HN: Running server scripts from smartphone via SSH
6 days ago
- Remote Runbooks are SSH scripts stored on a server and executed via RebootX with one click.
- Runbooks are loaded from the /usr/local/sbin/rebootx/runbooks directory on the server, with possible customization based on user feedback.
- Scripts prefixed with '__' are marked as dangerous, requiring confirmation before execution for safety.
- Unlike SSH Command Macros, Remote Runbooks are managed on the server, ideal for long scripts, while macros are for short commands and shared across providers.
- The feature is new, and users are encouraged to provide feedback via the app for improvements or assistance.
GitHub suddenly rejected my SSH key (the fix was a .pub file?)
10 hours ago
- Git pull stopped working on a laptop with an SSH key that was previously fine, while the same key worked on other devices.
- The private key was valid, using a modern signature algorithm, and SSH config was correct; GitHub status was green.
- The fix was simply generating a missing .pub file from the private key using `ssh-keygen -y -f <key> > <key>.pub`.
- A 12-trial test confirmed that the .pub file is required: without it, authentication is rejected; with it, it works.
- The .pub file changes OpenSSH's authentication flow: with it, the client probes the server before signing; without it, it sends a direct signed request.
- Both flows are valid per RFC 4252, but GitHub seems to now reject the direct signed request, possibly due to new server software (identified by banner '6a2c000').
- The author suggests that GitHub's SSH frontend changed, causing the issue, and recommends ensuring that all private keys have corresponding .pub files.

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Using PowerShell over SSH, Twenty Years Later

Show HN: Running server scripts from smartphone via SSH

GitHub suddenly rejected my SSH key (the fix was a .pub file?)