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Top Forums Shell Programming and Scripting Alternative network messaging? Post 302718445 by DGPickett on Friday 19th of October 2012 03:28:03 PM
Old 10-19-2012
I suppose it depends on what you call sending a message. email works for most of us. You can ssh between hosts, but to message people youu need to find specific tty names as well. If you want them to reply, you need some sort of artifact there for them to send through. I once tried something with mmap() atached NFS files, but changes were not picked up unless I did an ls on the end remote from the write. Maybe if everyone tailed a file and wrote to that file under an id header line in tight blocks, you would have a logged chat session. I have done that. If you have no NFS, you can "ssh ... tail -f chatfile &" to see the dialog on one xterm and do an ssh to write blocks from another. You write blocks by composing them in an env variable and then echoing the variable as one atomic write. Oh, I said that word, but the command is echo not write.
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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 (presumably using a login password, so password authentication should be enabled, unless you've done some clever use of multiple identities) It also changes the permissions of the remote user's home, ~/.ssh, and ~/.ssh/authorized_keys to remove group writability (which would oth- erwise prevent you from logging in, if the remote sshd has StrictModes set in its configuration). 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) SEE ALSO
ssh(1), ssh-agent(1), sshd(8) OpenSSH 14 November 1999 SSH-COPY-ID(1)
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