@@ -4,7 +4,7 @@ Please feel free to add you questions and anwsers.
[[_TOC_]]
## Q: ssh using key authentication?
## Q: How to use ssh-key authentication?
In order to connect passwordless to a remote server a key needs to be generated.
```
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@@ -29,11 +29,34 @@ The key's randomart image is:
| |
+----[SHA256]-----+
```
It is recommended to use a password to encrpyt the private key `.ssh/id_rsa`. However, this password is then required to login.
Todo add infos on `ssh-agent`
It is recommended to use a password to encrpyt the private key `.ssh/id_rsa`. However, this password is then required each time to login. Using an `ssh-agent` can solve that problem.
# Q: How to transfer files between two VPN networks?
## Q: How to use an ssh-agent?
Using an SSH-Agent will make your connection even safer, as your private key is encrypted with a passphrase. To create a ssh-key goto [How to use ssh-key authentication?](#How-to-use-ssh-key-authentication?).
Continue with how to use the ssh-agent:
```bash
# Launch the SSH Agent
eval`ssh-agent`
# this will add your ssh-keys from ~/.ssh/
# You will be asked a passphrase if you have one
# this will add .ssh/id_rsa as default
ssh-add
# or any keyfile you created:
ssh-add .ssh/secret_key
# Copy the ssh-key (pub) to the server
ssh-copy-id [user]@[server]
# and connect
ssh [user]@[server]
# Kill the agent and all store secure information
ssh-agent -k
```
**Tip: configure your `.ssh/config` file to use the correct key a server. Goto [SSH](SSH.md)**
[Nice summary of how an ssh-agent works](https://smallstep.com/blog/ssh-agent-explained/)
## Q: How to transfer files between two VPN networks?
You should be able to use an SSH tunnel via a gateway server
2.Connect using [TeachingHub](../TeachingHub.md) or [ResearchHub](../Jet-Cluster.md#jupyterhub)
3.Connect using [VNC](VNC.md)
4.Access from outside the UNI, [VPN](VPN.md)
## Jupyterhub
Currently, there are two JupyterHub instances runnning:
- TeachingHub on SRVX1
- ResearchHub on Jet01
On SRVX1 the TeachingHub and on Jet01 the ResearchHub is running and available to users and students. Connect to either [https://srvx1.img.univie.ac.at](https://srvx1.img.univie.ac.at) from everywhere or [https://jet01.img.univie.ac.at](https://jet01.img.univie.ac.at) from within the university network.
[Here](../TeachingHub.md) is more information on how to connect and authenticate.
Connect to either
-[https://srvx1.img.univie.ac.at](https://srvx1.img.univie.ac.at) from everywhere
-[https://jet01.img.univie.ac.at](https://jet01.img.univie.ac.at) from within the university network.
## Screen
[Screen](https://wiki.ubuntuusers.de/Screen/) is terminal session manager, that allows to start processes and reconnect to these processes after disconnection.
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@@ -28,4 +30,10 @@ You can detach from this session with `CTRL + A + D` and reconnect again with `s
Multiple Sessions can be created and the output saved (`-L` Option).
## Questions and Answers
-[Q: How to use ssh-key authentication?](Questions.md#q-how-to-use-ssh-key-authentication)
-[Q: How to use an ssh-agent?](Questions.md#q-how-to-use-an-ssh-agent)
-[Q: How to transfer files between two VPN networks?](Questions.md#q-how-to-transfer-files-between-two-vpn-networks)
-[Q: How to connect to Jet, SRVX8, SRVX2?](Questions.md#q-how-to-connect-to-jet-srvx8-srvx2)
-[Q: How to mount a remote file system on Linux (MAC)?](Questions.md#q-how-to-mount-a-remote-file-system-on-Linux-mac)
