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Top Forums Shell Programming and Scripting Find active SSH servers w/ ssh keys on LAN Post 303025417 by rbatte1 on Friday 2nd of November 2018 05:50:53 AM
Old 11-02-2018
You could also use nc to poke the port before trying to connect.
Code:
nc -z $target_server 22

Return code of zero for a successful contact. That might cut down the number of hosts you try to talk to that never respond.

Why is this part written like this?
Code:
:
cat ssh-keys.txt | awk '{print $9}' > cutted.ssh_keys.txt
ssh_keys=$(cat cutted.ssh_keys.txt)
:

Assuming that your file is space separated, you could just have
Code:
ssh_keys=$(cut -f9 -d" " ssh-keys.txt)


I hope that these help,
Robin
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SSH-COPY-ID(1)						      General Commands Manual						    SSH-COPY-ID(1)

NAME
ssh-copy-id - install your public key in a remote machine's authorized_keys SYNOPSIS
ssh-copy-id [-i [identity_file]] [user@]machine DESCRIPTION
ssh-copy-id is a script that uses ssh to log into a remote machine and append the indicated identity file to that machine's ~/.ssh/autho- rized_keys file. If the -i option is given then the identity file (defaults to ~/.ssh/id_rsa.pub) is used, regardless of whether there are any keys in your ssh-agent. Otherwise, if this: ssh-add -L provides any output, it uses that in preference to the identity file. If the -i option is used, or the ssh-add produced no output, then it uses the contents of the identity file. Once it has one or more fin- gerprints (by whatever means) it uses ssh to append them to ~/.ssh/authorized_keys on the remote machine (creating the file, and directory, if necessary.) NOTES
This program does not modify the permissions of any pre-existing files or directories. Therefore, if the remote sshd has StrictModes set in its configuration, then the user's home, ~/.ssh folder, and ~/.ssh/authorized_keys file may need to have group writability disabled manu- ally, e.g. via chmod go-w ~ ~/.ssh ~/.ssh/authorized_keys on the remote machine. SEE ALSO
ssh(1), ssh-agent(1), sshd(8) OpenSSH 14 November 1999 SSH-COPY-ID(1)
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