Category: General

  • Make sure to install SSH
yum install openssh-clients
  • You want to SSH from Server A to server B without a password
  • First log in on A and generate a pair of authentication keys. Do not enter a passphrase:
ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/
cd .ssh
  • Now use ssh to create a directory on the remote server ~/.ssh :
ssh root@B mkdir -p .ssh
cat | ssh root@B 'cat >> .ssh/authorized_keys'

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