Use SSH-Agent2015/04/12

	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

[cent@dlp ~]$

eval `ssh-agent`

Agent pid 1080

# add Identity

[cent@dlp ~]$

ssh-add

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

node01.srv.world

# exit from SSH-Agent

[cent@dlp ~]$

eval `ssh-agent -k`

Agent pid 1080 killed

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