SSH to server read from file

Question

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bash tool to get nth line from a file

I want to build a small SSH manager for myself, and I want to hold all servers in a plain text file and I want to do something like:

ssh -i /home/edy/Documents/visually_ops.pem root@((N-th line of my file))

So I can use the ssh command and send it the N-th line of my plain text file, which is the host name. Would this be achievable?

@KerrekSB not entirely. I already knew how to extract a line from a file, but not how to use it as *part* of a command, which Stephane covered in a nice manner. — Eduard Luca, Sep 04 '12 at 11:56

score 1 · Accepted Answer · answered Sep 04 '12 at 11:16

1

to print the n-th line of your host file you can use sed. For instance:

sed -n '3p' yourfile

will print the third line.

ssh -i /home/edy/Documents/visually_ops.pem root@$(sed -n '3p' yourfile)

answered Sep 04 '12 at 11:16

Stephane Rouberol

Yes, I know, but I don't really know how to append the result of this command to my `ssh` command. – Eduard Luca Sep 04 '12 at 11:17
Wonderful, works like a charm. You are a linux guru, my friend :) – Eduard Luca Sep 04 '12 at 11:54

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