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Full Discussion: Using read to assign value to bash variable not working
Top Forums UNIX for Beginners Questions & Answers Using read to assign value to bash variable not working Post 303043531 by sand1234 on Thursday 30th of January 2020 06:07:03 PM
Old 01-30-2020
Using read to assign value to bash variable not working
Hi,

I am attempting to assign the output of the following command, to two bash variables, var1 and var2 using "read," but it doesn't seem to be working.

Code:
[root@xxx ~]# openstack hypervisor stats show | awk -F'|' 'NR==14{print $2,$3}'
 vcpus                  92

[root@xxx ~]# echo $?
0

[root@xxx ~]# openstack hypervisor stats show | awk -F'|' 'NR==14{print $2,$3}' | read var1 var2

[root@xxx ~]# echo $var1

[root@xxx ~]# echo $var2

Could I get some guidance around what is happening here?

I'm familiar with using var1=$(awk ...) to assign output to a bash variable, but wanted to see how it's done with read.

Thanks.
Last edited by rbatte1; 02-06-2020 at 06:35 AM..
 

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LEARN ABOUT DEBIAN

nbtscan

NBTSCAN(1)						      General Commands Manual							NBTSCAN(1)

NAME

       nbtscan --  program for scanning networks for NetBIOS name information

SYNOPSIS

       nbtscan	[-v]   [-d]   [-e]   [-l]   [-t  timeout]   [-b  bandwidth]   [-r]   [-q]   [-s separator]  [-h]  [-m retransmits]  [-f filename |
       scan_range]

DESCRIPTION

       This manual page documents briefly the nbtscan command.

       This manual page was written for the Debian GNU/Linux distribution because the original program does not have a manual page.

       nbtscan is a program for scanning IP networks for NetBIOS name information. It sends NetBIOS status query to each address in supplied range
       and  lists  received information in human readable form. For each responded host it lists IP address, NetBIOS computer name, logged-in user
       name and MAC address (such as Ethernet).

OPTIONS

       A summary of options is included below.

       -v	 Verbose output. Print all names received from each host.

       -d	 Dump packets. Print whole packet contents. Cannot be used with -v, -s or -h options.

       -e	 Format output in /etc/hosts format.

       -l	 Format output in lmhosts format. Cannot be used with -v, -s or -h options.

       -t timeout
		 Wait timeout seconds for response. Default 1.

       -b bandwidth
		 Output throttling. Slow down output so that it uses no more that bandwidth bps.  Useful on slow links, so  that  ougoing  queries
		 don't get dropped.

       -r	 Use local port 137 for scans. Win95 boxes respond to this only.  You need to be root to use this option.

       -q	 Suppress banners and error messages.

       -s separator
		 Script-friendly output. Don't print column and record headers, separate fields with separator.

       -h	 Print human-readble names for services.  Can only be used with -v option.

       -m retransmits
		 Number of retransmits. Default 0.

       -f filename
		 Take IP addresses to scan from file "filename"

       scan_range
		 What  to  scan.  Can  either  be  single  IP  like  192.168.1.1  or range of addresses in one of two forms: xxx.xxx.xxx.xxx/xx or
		 xxx.xxx.xxx.xxx-xxx.

BUGS

       Report bugs to alla@sovlink.ru (that's autor of nbtscan). I cannot promise to do anything but I might well want fix it. Remember:  no  war-
       ranty.  At least it's worth what you payed for it.

AUTHOR

       This  manual  page  was	written by Ryszard Lach rla@debian.org for the Debian GNU/Linux system (but may be used by others) and is based on
       nbtscan author's README file.  Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free  Docu-
       mentation License, Version 1.1 or any later version published by the Free Software Foundation.

																	NBTSCAN(1)
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