Merge ~xavpaice/charm-nrpe:bug/1924960 into charm-nrpe:master

[Xav Paice]

[Jose Guedez (jfguedez)]

LGTM

review: Approve

diff --git a/files/plugins/check_netns.sh b/files/plugins/check_netns.sh
index c5306c9..2477bb5 100755
--- a/files/plugins/check_netns.sh
+++ b/files/plugins/check_netns.sh
@@ -26,7 +26,7 @@ check_netns_create() {
 netnsok=()
 netnscrit=()
 
-for ns in $(ip netns list | egrep -v '^nrpe-check$'); do
+for ns in $(ip netns list |awk '!/^nrpe-check$/ {print $1}'); do
     output=$(ip netns exec $ns ip a 2>/dev/null)
     err=$?
     if [ $err -eq 0 ]; then