The included, MacOSX-native ssh binary does not support newer SHA2 keys, so it gets the dreaded “no hostkey alg” error. To fix that, install ssh via homebrew or macports and use that binary instead:
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shell>ssh myserver ls
no hostkey alg
shell>which ssh
/usr/bin/ssh
shell>find/opt-name ssh
/opt/local/bin/ssh
...
shell>/opt/local/bin/ssh-V
OpenSSH_9.9p2,OpenSSL3.4.111Feb2025
shell>/opt/local/bin/ssh myserver
The authenticity of host'myserver (1.2.3.4)'can't be established.
ED25519 key fingerprint is SHA256:Mmx6y1Z/example+/sbw.
This key is not known by any other names.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added 'myserver'(ED25519)tothe list of known hosts.
Activate the web console with:systemctl enable--now cockpit.socket
When trying to mount can XFS filestsen on an AWS instance, I got the error “mount: wrong fs type, bad option, bad superblock on /dev/sdh” Examine the volume’s UUID with the xfs_db command: shell> sudo xfs_db -c uuid /dev/nvme2n1 To fix the problem, you have two options… Temporary Solution Add nouuid mount option to temporarily […]
When trying to access the serial console on AWS, I got the following error: Cannot open access to console, the root account is locked Since I had edited /etc/fstab, the host would not boot. The only way to fix this problem is to unmount the root volume from the affected instance, mount it on another […]
I have been using RSA SSH keys forever to login to my various AWS EC2 instances. With macOS Ventura 13.3.1 ssh failed with the “Permission Denied” error. Using ssh -vvv, I saw that the RSA key was now being rejected. After much research, I decided to implement new keys on the client (Ventura) side using […]
If you get the following error in WordPress when using the WPDataTables plugin, follow these steps to fix it: “You are trying to load a table of an unknown type. Probably you did not activate the addon which is required to use this table type.” SOLUTION SUMMARY: You must update the plugin files manually, deactivate […]
Try a newer browser before anything else! I was using an older version of Safari on Mac and got this:
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Ifyou're seeing thisGrafana has failed toload its application files
1.Thiscould be caused by your reverse proxy settings.
2.Ifyou host grafana under subpath make sure your grafana.ini root_url setting includes subpath.Ifnotusingareverse proxy make sure toset serve_from_sub_path totrue.
3.Ifyou havealocal dev build make sure you build frontend using:yarn start,yarn start:hot,oryarn build
4.Sometimes restarting grafana-server can help
5.Check ifyou are usinganon-supported browser.Formore information,refer tothe list of supported browsers.
I switched to the latest version of FireFox and was fine.
erics, April 9th, 2025 
Categories: How-To's, Technology alg, Error, hostkey, howto, MacOS, macosx, no hostkey alg, ssh, tips
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