08-28-2009
Comparing multiple variables
Hi!
I've come up with a ksh-script that produces one or more lists of hosts.
At the and of the script, I would like to print only those hosts that exists in all the lists.
Ex.
HOSTS[1]="host1 host2 host3 host11"
HOSTS[2]="host1 host2 host4"
HOSTS[3]="host2 host11"
HOSTS[4]="host2 host5 host6 host7 host8"
This should generate a print-out of "host2" only.
How can I do this in a effective manner?
My current solution is not exact, so it would render a output of "host1 host2" as "host1" is part of string "host11".
($run contains the number of host-rows that are produced earlier)
for candidate in ${HOSTS[1]};do
HIT=true
for (( i=1;i<=$run;i++ ));do
if [ $(($i+1)) -le $run ];then
if ! [[ ${HOSTS[$i+1]} = *"$candidate"* ]];then
HIT=false
fi
fi
done
if [ x${HIT} = xtrue ];then
FINAL="$FINAL $candidate "
fi
done
Any ideas how to solve this?
//Br Bugenhagen
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ypset(8) System Manager's Manual ypset(8)
NAME
ypset - bind ypbind to a particular NIS server
SYNOPSYS
ypset [ -d domain ] [ -h hostname ] server
DESCRIPTION
In order to run ypset, ypbind must be initiated with the -ypset or -ypsetme options. See ypbind(8). ypset tells ypbind to get NIS ser-
vices for the specified domain from the ypserv(8) process running on server.
In cases where several hosts on the local net are supplying NIS services, it is possible for ypbind to rebind to another host even while
you attempt to find out if the ypset operation succeeded. For example, you can type:
example% ypset host1
example% ypwhich
host2
which can be confusing. This is a function of the NIS subsystem's attempt to know always a running NIS server, and occurs when host1 does
not respond to ypbind because it is not running ypserv (or is overloaded), and host2, running ypserv, gets the binding.
Server indicates the NIS server to bind to, and must be specified as a name or an IP address. This will work only if the node has a cur-
rent valid binding for the domain in question, and ypbind has been set to allow use of ypset. In most cases, server should be specified
as an IP address.
OPTIONS
-d domain
Specify a domain other than the default domain as returned by domainname(1).
-h hostname
Set the NIS binding on host hostname
instead of the local machine.
SEE ALSO
domainname(8), ypbind(8), ypcat(8), ypmatch(1), ypserv(8), yppoll(8), ypwhich(1)
AUTHOR
ypset is part of the yp-tools package, which was written by Thorsten Kukuk <kukuk@suse.de>.
YP Tools 2.9 May 1998 ypset(8)