nc command in script vs. in shell
 

I am using the following Linux command and have tried it in a script (tried it in bash and csh) and from the bash shell:
nc -z -w 2 <hostid> 22
where host ID has been validated as a valid domain (tried it on my own domain name).

When I do it at the shell prompt, it works perfectly, but when the script issues the identical command, I get this error:
nc: getaddrinfo: Name or service not known

Can someone give me an idea as to what I am doing wrong?

What shell are you using, what hashbang are you using (the #! line at the start of the script), and what command are you using to run the script?

nc in script
 

As stated in my post, I have tried it with both bash (#!/bin/bash) and csh(#!/bin/csh) and my shell is a bash shell.
Also, further investigation shows that the cause is related to the value of the domain name.
The domain name comes from this line in my script:
for id in (grep -v '^#' ~/hostnames)

when I do:
echo $id
it looks OK, but it clearly is not working.

I guess you could try full path to nc.

/bin/nc or wherever.

I don't know how domain would fail if it works in shell. A script should run nc.

Problem solved: the grep operation was appending an extra character(0x00) at the end of my domain string. Using substring to remove it removed the cause of the error.

Thanks for the update.

Well done for posting the solution - could you mark the thread as 'SOLVED' please?

Thanks,