Save ssh output to a variable

Question

I'm a bash scripting newb that is trying to write a script to retrieve ospf neighbors from routers that don't support that through snmp. The following script works:

#!/bin/bash

rm ./results.txt

sshpass -f pfile ssh -T [email protected] > results.txt <<"ENDSSH"
show ip route ospf neighbor
exit
ENDSSH

Rather than put the results in a text file I would like them to be in a variable so I can parse the results. I've tried the following to no avail:

MYVAR=$(sshpass -f pfile ssh -T [email protected] <<"ENDSSH"
show ip route ospf neighbor
exit
ENDSSH)

Any help is appreciated.

Have you tried it all on one line? MYVAR=$(sshpass -f pfile ssh -T [email protected] <<"ENDSSH"; show ip route ospf neighbor; exit; ENDSSH;) — Zak
– Zak, Commented Aug 2, 2022 at 17:06

wjandrea · Accepted Answer · 2022-08-02 17:19:12Z

5

The line to end the here document has to be exactly ENDSSH, nothing else.

MYVAR=$(sshpass -f pfile ssh -T [email protected] <<"ENDSSH"
show ip route ospf neighbor
exit
ENDSSH
)

Still, I see no need for -T and no need for a here document, but maybe it's needed by the router. I would also use a lower case variable -- upper case variables are for exported variables.

myvar=$(sshpass -f pfile ssh [email protected] show ip route ospf neighbor)

edited Aug 2, 2022 at 17:19

wjandrea

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answered Aug 2, 2022 at 17:08

KamilCuk

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1 Comment

JeremyInDenver Over a year ago

Thanks, moving the parentheses did the trick. FWIW the -T is required with a Moxa router. I also couldn't use your second suggestion because without the "exit" command the router just kept the connection open until the five minute timeout.

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