Dropbear SSH - Download & Install

As the first step go to  https://matt.ucc.asn.au/dropbear/dropbear.html
after locate Download section ( on the right side ) o click on the link https://matt.ucc.asn.au/dropbear/
Select the last one according to your year ( to me is "dropbear-2017.75.tar.bz2     2017-05-18 22:55  1.5M  Link to releases directory instead" )

Tip: I copy the link with the right button over and get it using  wget
Example:
wget https://matt.ucc.asn.au/dropbear/dropbear-2017.75.tar.bz2

uncompress the bzip2 using:
tar -jxvf dropbear-2017.75.tar.bz2

go to the folder:
cd dropbear-2017.75

use the ./configure  to meet your requieremnts

and compile it using

$ make PROGRAMS="dropbear"

this make the program  "dropbear"  listed in the directory

-rwxrwxr-x. 1 mariotpc mariotpc 220K Jul 28 12:14 dropbear

How to install it ?

Simple as a run the command

make PROGRAMS="dropbear" install

If you get "Permission denied", use the su command

make PROGRAMS="dropbear" install
install -d /usr/local/sbin
install dropbear /usr/local/sbin
install: cannot remove '/usr/local/sbin/dropbear': Permission denied
make: *** [Makefile:146: inst_dropbear] Error 1

su make PROGRAMS="dropbear" install