OpenSSH : Use SSH-Agent2018/04/28

	Use SSH-Agent to automate inputting passphrase on key-pair authentication.
[1]	It's necessarry to set key-pair first.
[2]	How to use SSH-Agent.

# start SSH-Agent

ubuntu@dlp:~$

eval $(ssh-agent)

Agent pid 983

# add Identity

ubuntu@dlp:~$

ssh-add

Enter passphrase for /home/ubuntu/.ssh/id_rsa:
Identity added: /home/ubuntu/.ssh/id_rsa (/home/ubuntu/.ssh/id_rsa)

# confirm

ubuntu@dlp:~$

ssh-add -l

2048 xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:4c:b2 /home/ubuntu/.ssh/id_rsa (RSA)

# try to conenct with SSH without passphrase

ubuntu@dlp:~$

ssh www.srv.world hostname

www.srv.world

# exit from SSH-Agent

ubuntu@dlp:~$

eval $(ssh-agent -k)

Agent pid 983 killed

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