bash script that uses nc for telnet reports ": command not found OK"

Question

If I go to a bash prompt and run the following command (to flush memcached):

echo "flush_all" | /usr/bin/nc 172.16.198.130 11211

it works and returns "OK".

If I put that same command in a one-line bash script:

#!/bin/sh
`echo "flush_all" | /usr/bin/nc 172.16.198.130 11211`

I get the following output:

: command not found OK

Is it trying to process "OK" as a second command? How can I prevent this (short of redirecting to /dev/null)?

Answer 1

This: #!/bin/sh `echo bob` `echo jim`

Is identical to me doing this on the terminal:

# bob
bob: command not found
# jim
jim: command not found

Remove the backticks.

Answer 2

With the backticks around the commands, you're attempting to execute the output of:
echo "flush_all" | /usr/bin/nc 172.16.198.130 11211
In your case "OK"
like already mentioned in the comments just remove the backticks.