10-10-2019
Thanks, MadeInGermany, for pointing that ssh -n option out. Still, the commands are passed as such (no backtics ``!) to the remote server, so uname -r will be executed remotely.
The script was tested successfully as given in post #4, admittedly on one single server only. The respective variables were correctly filled with the remote info. If something does not work as expected, start over and test stepwise:
- log into the respective remote server(s) and interactively run the commands as given. They should give a one line output each. Multiline output will make the approach fail.
- run the entire ssh command on one server and with one remote command, then with multiple commands, reading results into local variables
- test remote access on all servers, with one command, and then with multiple. If one server (the 50th?) fails, repeat former steps on this one. The error may be due to a remote inconsistency.
- include thorough debuggung / error handling between command (blocks).
I quickly verified the code reading multiple remote servers from a SOURCE_FILE, and it works. echo the remote IP before running the ssh command.
This User Gave Thanks to RudiC For This Post:
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LEARN ABOUT FREEBSD
ssh-copy-id
SSH-COPY-ID(1) BSD General Commands Manual SSH-COPY-ID(1)
NAME
ssh-copy-id -- copy public keys to a remote host
SYNOPSIS
ssh-copy-id [-lv] [-i keyfile] [-o option] [-p port] [user@]hostname
DESCRIPTION
The ssh-copy-id utility copies public keys to a remote host's ~/.ssh/authorized_keys file (creating the file and directory, if required).
The following options are available:
-i file
Copy the public key contained in file. This option can be specified multiple times and can be combined with the -l option. If a
private key is specified and a public key is found then the public key will be used.
-l Copy the keys currently held by ssh-agent(1). This is the default if the -i option was not specified.
-o ssh-option
Pass this option directly to ssh(1). This option can be specified multiple times.
-p port
Connect to the specified port on the remote host instead of the default.
-v Pass -v to ssh(1).
The remaining arguments are a list of remote hosts to connect to, each one optionally qualified by a user name.
EXIT STATUS
The ssh-copy-id utility exits 0 on success, and >0 if an error occurs.
EXAMPLES
To send a specific key to multiple hosts:
$ ssh-copy-id -i /path/to/keyfile.pub user@host1 user@host2 user@host3
HISTORY
The ssh-copy-id utility was written by Eitan Adler <eadler@FreeBSD.org> as a drop-in replacement for an existing utility included with
OpenSSH.
BSD
February 28, 2014 BSD