CentOS 6
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Use SSH-Agent2015/04/12

Use SSH-Agent to automate inputting passphrase on key-pair authentication.
[2] How to use SSH-Agent.
# start SSH-Agent

[cent@dlp ~]$
eval `ssh-agent`

Agent pid 1080
# add Identity

[cent@dlp ~]$

Enter passphrase for /home/cent/.ssh/id_rsa:
Identity added: /home/cent/.ssh/id_rsa (/home/cent/.ssh/id_rsa)
# confirm

[cent@dlp ~]$
ssh-add -l

2048 xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:4c:b2 /home/cent/.ssh/id_rsa (RSA)
# try to conenct with SSH without passphrase

[cent@dlp ~]$
ssh node01.srv.world hostname

# exit from SSH-Agent

[cent@dlp ~]$
eval `ssh-agent -k`

Agent pid 1080 killed
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