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### SSH (Secure Shell Protocol)  
* Find out your username  
`whoami`  

* Check ip address  
`ifconfig`  
`nmcli -p device show`  

* 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:*'`  

* Locking and unlocking the file system from read-only to read-write and vice-versa.
* How to copy files to an Android emulator’s data directory with ‘adb push’ 
mount -o rw,remount rootfs /

* Revert the changes back after finishing the changes!
cat /proc/mounts
mount -o ro,remount rootfs /


*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 \