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linux/ssh: improved ssh key login with link to automation video

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@ -41,6 +41,9 @@ You can use the modified command below for ease of use:
cat ~/.ssh/id_rsa.pub | ssh username@server 'cat >> ~/.ssh/authorized_keys'
```
This can also be more or less fully automated using the `-G` flag of SSH as described in
[a YouTube video by nixhero](https://www.youtube.com/watch?v=xCX14u9XzE8).
### Mount Directory With SSHFS
This section is loosely based on
@ -71,7 +74,7 @@ Host server
User user
```
### X-Forwarding
### X-Forwarding
The following sections address the usage of X-forwarding which makes it possible to use graphical
programs remotely over SSH.
@ -80,7 +83,7 @@ programs remotely over SSH.
This section is based on a
[blog by rc nectar](https://tutorials.rc.nectar.org.au/x11forwarding/02-enable-x11-on-virtual-machine).
For the server setup of X-forwarding edit the file `/etc/ssh/sshd_config` and make sure
For the server setup of X-forwarding edit the file `/etc/ssh/sshd_config` and make sure
X-forwarding is enabled by editing a line to look like the following.
```txt
@ -112,7 +115,7 @@ following lines.
```
ForwardX11 yes
ForwardX11Trusted yes
```
```
The functionality of X-forwarding can easily be tested by running a graphical program when remotely
connected.
@ -120,13 +123,13 @@ An example for this could be the simple clock program `xclock`.
### Port Tunneling
This section is based on the
This section is based on the
[documentation of PostgreSQL](https://www.postgresql.org/docs/current/ssh-tunnels.html).
A specific port can be tunneled from a remote host to a client via SSH.
This could be especially useful when coding remotely and wanting to access a database like
PostgreSQL or other services.
For the forwarding of a port run the following command.
For the forwarding of a port run the following command.
`<local address>` (for example `localhost`) and `<local port>` (for example `63333`) are the
target (and most of the time local) address and port to tunnel the service to.
`<address of server>` (for example `joe@foo.com` or an alias) specifies the address and username of
@ -141,14 +144,14 @@ After running the command the tunnel will stay established until the process is
This can be done by running a command identical or similar to the following which is used to find
the process.
```sh
```sh
ps aux | grep "ssh -f -N -L <local port>"
```
Afterwards it can be killed by running the follwing command where `<process-id>` is the id of the
process found with the previous command.
```sh
```sh
kill <process-id>
```