I found this website with a bunch of
ssh tricks. Some highlights:
Compare a Remote File with a Local Filessh user@host cat /path/to/remotefile | diff /path/to/localfile -
Useful for checking if there are differences between local and remote files.
scp user@host:/path/to/remotefile /tmp/remotefile && opendiff /path/to/localfile /tmp/remotefile
SSH Connection through host in the middlessh -t reachable_host ssh unreachable_host
Unreachable_host is unavailable from local network, but it’s available from reachable_host’s network. This command creates a connection to unreachable_host through “hidden” connection to reachable_host.
-t option uses less overhead on the intermediate host. Same trick is used later in the article where you directly attach to a remote
ssh -t remote_host screen -r
Though I prefer using
screen -DR. Read the man page for details.
The next one however didn’t do anything for me, I suspect there is a piece missing in the command somewhere:
Remove a line in a text Filesed -i 8d ~/.ssh/known_hosts
However there is a dedicated tool for this: use
ssh-keygen -R host
instead. I re-image some machines over and over again and then run into the ssh host key errors. This is very useful.