Torben at 10:52, 17 October 2025

2025-10-17T10:52:00Z

New page

[[Category:Linux]]
see [https://help.github.com/articles/generating-ssh-keys] [https://en.wikipedia.org/wiki/Ssh-keygen]

===SSH password-free-login===
all in 1 go (exceute on ssh client machine)
ssh-copy-id user@remotehost

====On the ssh-client machine====
Use ssh-keygen to create private and public keys in the folder ~/.ssh/
ssh-keygen -t rsa
or
ssh-keygen -t rsa -C "email@host.com"
# ( or -t dsa )
passphrase can be empty
The public key is in the file ~/.ssh/id_rsa.pub

adding or changing passphrase
ssh-keygen -p

storing passphrase of client via ssh-agent (linux)
ssh-agent bash
ssh-add

====On the ssh server machine====
* append your public key to ~/.ssh/authorized_keys (you may have to create this file)
* set that files permissions to 0640
* set .ssh/ permissions to 0640

====Windows Client using Putty and PAgent====
* use PuTTYgen to generate a RSA key
** set password
** set comment, for example hostname of client machine
** store private and public keys
* edit generated public key
** remove linebreaks from key
** prepend ssh-rsa to key followed by a space. So it looks like ssh-rsa AAAAB3Nza...
* double click on private key to load it into Pageant (key manager)
* in Putty
** load your ssh connection
** put private key to Connection->SSH->Auth
** save connection
* on Server
** place public key without comments in ~/.ssh/authorized_keys, see above

===Mount using ssh===
apt-get install sshfs
now you can run
/usr/bin/sshfs -o idmap=user server:/home/USER /mount/DIR
The option idmap=user is important to map the servers and clients user id

(this does not work from fstab...)

===Fix for warning: setlocale: LC_CTYPE===
bash: warning: setlocale: LC_CTYPE: cannot change locale (UTF-8): No such file or directory
can be fixed on the SSH host by
sudo vim /etc/ssh/sshd_config
# remove this:
AcceptEnv LANG LC_*
# now restart ssh:
sudo systemctl restart ssh

SSH - Revision history

Torben at 10:52, 17 October 2025