Use your putty ppk file to ssh remote server in ubuntu
Problem : You have been using winscp tool in windows to access your remote server. Now the geek inside you make a move to linux and you are stuck how to use the passkey used in winscp with openssh client in linux.
Solution: First of all, the .ppk file is putty specific one and you need to convert it to the openssh format, so that it can be used with ssh command in the terminal.
To convert the ppk file download the puutygen tool in ubuntu (the commands vary a lil bit depending on the flavour of linux you are using):
sudo apt-get install putty
This will automatically install the puttygen tool.
Now to convert the ppk file to be used with ssh command execute the following in terminal
puttygen mykey.ppk -O private-openssh -o my-openssh-key
Now, you can easily access to remote server using:
sudo ssh -v firstname.lastname@example.org -i my-openssh-key