How to run scp command without password from ubuntu to centOS machine

I want to run scp command from my machine(Ubuntu_14) to my server (CentOS_6)

I have already generate a pair of authentication keys, also append my public key to my servers .ssh/authorized_keys, now I can run ssh command from my machine to my server without password, but when I am going to run scp command it asking for password

Please help me..

2 Answers

Since you can ssh to the server only with your key, you can scp with the key too - just make sure to point it with scp -i /path/to/private_key <source> <target>.

You can also use an ssh-agent program - you won't have to use the -i keyfile switch everytime (this applies for ssh too). Start it with:

ssh-agent bash
ssh-add -L #this lists the keys you have added (the public key)
ssh-add /path/to/private_key #this will add a key

Once you set up ssh-keygen as explained here, you can do

scp -i ~/.ssh/id_rsa /local/path/to/file :/path/in/remote/server/

where id_rsa is the local key generated in the ssh-keygen setup.

If you want to lessen typing each time, you can modify your .bash_profile file and put

alias remote_scp='scp -i ~/.ssh/id_rsa /local/path/to/file :/path/in/remote/server/

Then from your terminal do source ~/.bash_profile. Afterwards if you type remote_scp in your terminal it should run the scp command without password.