Copy a file to or from a server: roro9stack how-tos

One file at a time, between the SD card and a server you can log in to over SSH.

Connect to the server once in the SSH App (SSH → New connection, user@host) and trust its fingerprint. scp can't ask that question, so it only goes to servers it has met there.
For no password to type, put the device's key on the server: Log in to a server without a password. Without it, scp asks for the password.
Open the Shell and type, for a file going to the server:
```
scp /notes/a.txt user@host:docs/a.txt
```
or one coming from it, into a folder on the card (it keeps its name):
```
scp user@host:/var/log/syslog /logs/
```
You should see scp: ... (1234 bytes) to ..., then scp: sent 1234 bytes in 310 ms (or received).
If it says password for host, type it and press Enter: it shows as stars and is kept nowhere. Back cancels.

If it doesn't work

It says	Do
`is not a server this device trusts yet`	Step 1: connect once in the SSH App
`showed a different key than the one remembered`	The server was reinstalled, or something answers in its place. Check in the SSH App, which asks what to do
`exists already`	The file is on the card: add `-f` (`scp -f user@host:x /notes/x`) to replace it
`An SSH session is open` or `Not enough memory`	End the session (`ssh stop`), or close IRC or a Gemini page: not enough memory
`not logged in`, `wrong password`	Three tries, then it stops. Check the user, or the key on the server
`a password is only asked in the Shell`	You typed it from a PC on the USB port or the Debug Console: use the Shell, or put the key on the server
`that isn't a plain file`	`scp` copies one file, not a folder

Another port goes first: scp -P 2222 /notes/a.txt user@host:a.txt. cancel stops a copy that is running.