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linux/ssh: added ssh port tunneling and improved sshfs mounting

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@ -43,6 +43,9 @@ cat ~/.ssh/id_rsa.pub | ssh username@server 'cat >> ~/.ssh/authorized_keys'
### Mount Directory With SSHFS
This section is loosely based on
[a GitHub comment by mlopezgva](https://github.com/VSCodium/vscodium/discussions/693).
To mount a directory (in this case called `directory`) from a remote server
(in this case called `server` also can be substituted by something like
`user@server-ip`) on a local mount (in this case `mountpoint`) run:
@ -51,6 +54,12 @@ To mount a directory (in this case called `directory`) from a remote server
sshfs server:/directory mountpoint
```
This can be very useful when trying to code on a remote machine but wanting to use the local
instance of a text editor.
Services that are hosted and use ports on a remote server can be tunneled as described in
[the corresponding section](#port-tunneling) to setup complete remote development.
### Shorten SSH Connection Commands
By adding the following lines to the file `~/.ssh/config` the command of an SSH
@ -109,3 +118,24 @@ The functionality of X-forwarding can easily be tested by running a graphical pr
connected.
An example for this could be the simple clock program `xclock`.
### Port Tunneling
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.
`<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
the server that hosts the service and `<port of service>` (for example `5432`) describes the port
it is running at.
```sh
ssh -f -N -L <local port>:<local address>:<port of service> <address of server>
```
Files that are based on a remote server can be mounted as described in
[the corresponding section](#mount-directory-with-sshfs) to setup complete remote development.