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### SSH (Secure Shell Protocol)
- A method for secure remote login from one computer to another
* Find out your username
`$ whoami`
* Check ip address
** Linux
`$ ip addr show | grep "inet "`
`$ ifconfig`
`$ nmcli -p device show`
** Windows
`$ ipconfig`
> NOTE: The IP Address we use will usually be the one not similar to 127.0.0.1 (localhost) but rather a different string of numbers, ignore any forward slash and the numbers after it
> Example:
> `$ ip addr show | grep "inet "`
```bash
> inet 127.0.0.1/8 scope host lo
> inet <u>10.1.1.5</u>/27 brd 10.1.1.31 [...]
```
> The `10.1.1.5` is what we want in this example
* For Termux users:
* Termux install openssh
`$ pkg in openssh`
* Termux make sure user/root password is set
`$ passwd <user> # root does not need to be specified`
* Generate your ssh key pair on remote host machine, not on server machine
`$ ssh-keygen`
* Accessing termux user environment from other consoles
`$ scp [email protected]:~/.ssh/id_rsa.pub ~/.ssh/authorized_keys`
* Second Option How do I add SSH Keys to authorized_keys file?
`$ cat ~/.ssh/id_rsa.pub | ssh [email protected] "mkdir -p ~/.ssh && cat >> ~/.ssh/authorized_keys"`
* Start server in machine that will ssh into
`$ sshd`
* Android remote host into desktop server, assuming default port 8022
`$ ssh [email protected] -p 8022`
* Desktop remote host into android server, assuming default port 8022
`$ ssh [email protected]`
* To view the log output from the server process.
`$ logcat -s 'syslog:*'`
#### Copying files
##### (SCP Secure Copy Protocol)
- Syntax:
```bash
scp [OPTIONS] [[user@]src_host:]file1 [[user@]dest_host:]file2
```
```bash
scp file <remote_username>@<IPorHost>:<PathToFile> <LocalFileLocation>
```
How to SSH File Transfer from Remote to Local
1. Copy single file from local to remote using scp.
`$ scp myfile.txt remoteuser@remoteserver:/remote/folder/`
2. scp from remote to local using a single file.
`$ scp remoteuser@remoteserver:/remote/folder/remotefile.txt localfile.txt`
* Copy multiple files from remote to local:
`$ scp [email protected]:/some/remote/directory/\{a,b,c\} ./`
* Copy multiple files from local to remote:
`$ scp foo.txt bar.txt [email protected]:~`
`$ scp {foo,bar}.txt [email protected]:~`
`$ scp *.txt [email protected]:~`
* Copy multiple files from remote to remote:
`$ scp [email protected]:/some/remote/directory/foobar.txt \`
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