[SOLVED] Passing commands through an SSH shell in a bash script
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cat commands.txt | while read x; do echo $( ssh email@example.com "sudo $x" & ) ; done
I had to modify it a little bit because I'm not going to a linux box with a conventional superuser. I'm going to a MikroTik router. The PITA here is not with the router though because executing the commands works fine.
Here what I ended up using, still getting the same error:
cat /media/32GB/MikroTik/firewall_rules.txt | while read line; do
echo $( ssh firstname.lastname@example.org $line & ) ;
I tried putting $line in quotes too.
The really confusing part is that I call in another script before this that does essentially the same thing, it works, but uses:
Or you could scp the file to the remote server, and just run it with bash. This also negates the need to make multiple ssh connections within a short span of time. Just two: one to copy the file with the list of commands, and a second to ssh in to run the file.
Well, I spent a lot of time redoing this script. I've taken out all references to awk altogether and combined all of it in to one enormous script. A few bugs worked out thanks to the replies I've received here. Using ssh email@example.com < /media/32GB/MikroTik/firewall_scripts is awesome because it literally cut the run time of this script down to 1/100 of what it was. I've tested it, and this appears to be working just fine:
it's the same as sitting at a terminal in the remote environment, typing in each line, and hitting Enter after each one. Therefore, that one command - in the local environment - issues many commands in the remote environment, without any need to loop through variables, etc. That's the reason this method is so efficient. Program response time across a network is many times slower than in the local environment (with RAM, hard disks, etc), which makes it so much faster (in time) when using the more efficient (in programming) method when communicating across a network.
Think upon that, and marvel at the awesome power of the shell.