Match only first device if multiple

Match only the first return if multiple devices match

Operating_Systems/Linux/template_zfs_on_linux/6.0/userparams_zol_with_sudo.conf

@@ -32,13 +32,13 @@ UserParameter=zfs.arcstats[*],awk '/^$1/ {printf $$3;}' /proc/spl/kstat/zfs/arcs
 UserParameter=zfs.zpool.scrub[*],/usr/bin/sudo /sbin/zpool status $1 | grep "scrub in progress" > /dev/null ; echo $?
 
 # vdev state
-UserParameter=zfs.vdev.state[*],/usr/bin/sudo /sbin/zpool status | grep "$1" | awk '{ print $$2 }'
+UserParameter=zfs.vdev.state[*],/usr/bin/sudo /sbin/zpool status | grep -m 1 "$1" | awk '{ print $$2 }'
 # vdev READ error counter
-UserParameter=zfs.vdev.error_counter.read[*],/usr/bin/sudo /sbin/zpool status | grep "$1" | awk '{ print $$3 }' | numfmt --from=si
+UserParameter=zfs.vdev.error_counter.read[*],/usr/bin/sudo /sbin/zpool status | grep -m 1 "$1" | awk '{ print $$3 }' | numfmt --from=si
 # vdev WRITE error counter
-UserParameter=zfs.vdev.error_counter.write[*],/usr/bin/sudo /sbin/zpool status | grep "$1" | awk '{ print $$4 }' | numfmt --from=si
+UserParameter=zfs.vdev.error_counter.write[*],/usr/bin/sudo /sbin/zpool status | grep -m 1 "$1" | awk '{ print $$4 }' | numfmt --from=si
 # vdev CHECKSUM error counter
-UserParameter=zfs.vdev.error_counter.cksum[*],/usr/bin/sudo /sbin/zpool status | grep "$1" | awk '{ print $$5 }' | numfmt --from=si
+UserParameter=zfs.vdev.error_counter.cksum[*],/usr/bin/sudo /sbin/zpool status | grep -m 1 "$1" | awk '{ print $$5 }' | numfmt --from=si
 
 # Get zpool iostats 
-UserParameter=zfs.zpool.iostat[*],/usr/bin/sudo /sbin/zpool iostat $1 -H -p 1 2 | tail -n 1
+UserParameter=zfs.zpool.iostat[*],/usr/bin/sudo /sbin/zpool iostat $1 -H -p 1 2 | tail -n 1