ifup.sh: Add helpful message for when the brctl command is not found

In Ubuntu [20.04] for example, the package is not installed by default.
michaeljclark · Jan 21, 2021 · 76f026b · 76f026b
1 parent d5c8d07
commit 76f026b
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/scripts/ifup.sh b/scripts/ifup.sh
@@ -2,5 +2,10 @@
 
 set -o errexit
 
+if ! [ -x "$(command -v brctl)" ]; then
+  >&2 echo '`brctl` could not be found; please double check that the package is installed.'
+  exit 1
+fi
+
 brctl addif virbr0 $1
 ifconfig $1 up