How can connect server using .ppk key file

Solution 1:

You can use PuTTY in Ubuntu as well

sudo apt-get install putty

The equivalent to Putty in Linux, however, is to use ssh on the command line

ssh -i ~/.ssh/key user@server

You will need to convert your putty key (using PuTTYgen) to an openssh key or make a new key.

To convert the key, first import it, then export it as an openssh key.

convert key

See: https://help.ubuntu.com/community/SSH/OpenSSH/ConnectingTo

You can use any number of programs to connect similar to WinSCP, nautilus will do it

Key-based SSH login with Nautilus' "Connect to Server"

You can also use gftp

gftp