Remove passphrase (password) from private RSA key

gistfile1.txt

Should also work for:

[v] any OpenSSH installation

Given, your key is in id_rsa
1
Passphrase is needed?


Try some host which has your public key (id_rsa.pub)

> ssh my_user@myhost
 
You should get Enter passphrase for key kind of response

2
Remove passphrase


openssl rsa -in ~/.ssh/id_rsa -out ~/.ssh/id_rsa_new
 
and enter your old passphrase

3
Replace key


Backup and replace your private ssh key

cp ~/.ssh/id_rsa ~/.ssh/id_rsa.backup
rm ~/.ssh/id_rsa
cp ~/.ssh/id_rsa_new ~/.ssh/id_rsa
4
Set key permissions


chmod 400 ~/.ssh/id_rsa
5
Test it


Now, following should log your into remote system, no questions asked

> ssh my_user@myhost