= SSH KEY GEN =


1. Create ssh key at localhost [[br]]

{{{
ssh-keygen -t rsa -b 4096 -C user@remotehost.com
}}}

 Then they will ask to enter default .ssh path
{{{
Enter file in which to save the key (/home/yourusername/.ssh/id_rsa):
}}}

 We can key in any passphrase to make extra security but just press enter with empty key it will automate gen-key for you
{{{
Enter passphrase (empty for no passphrase):
}}}

 Now the public and private key will be kept in
{{{
ls -al
/home/yourusername/.ssh/id_rsa /home/yourusername/.ssh/id_rsa.pub
}}}

2. In your local host copy public key (id_rsa.pub) to remote host

{{{
ssh-copy-id remote_username@server_ip_address
}}} 
 or with manual ssh with 
 {{{
 cat ~/.ssh/id_rsa.pub | ssh remote_username@server_ip_address "mkdir -p ~/.ssh && chmod 700 ~/.ssh && cat >> ~/.ssh/authorized_keys && chmod 600 ~/.ssh/authorized_keys"
 }}}

3. Now you can ssh with out prompt for password

== Tunnel ssh ==

Ref [[https://linuxize.com/post/how-to-setup-passwordless-ssh-login/] ref]
Remote to local
At localhost user create tunnel to remote host with following
{{{
ssh -R 8022:localhost:22 remoteUser@remotehost.com
}}}
Then, at remote host, user can '''ssh -p 8022 localUser@127.0.0.1''' to localhost


Local to Remote
At localhost user create tunnel to remote host with following
{{{

}}}