diff --git a/linux/scripts/OGAgentTool b/linux/scripts/OGAgentTool
index 5195b11..0801591 100755
--- a/linux/scripts/OGAgentTool
+++ b/linux/scripts/OGAgentTool
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 for p in python python3; do
-    [ -z "$PYTHON" ] && [ $($p -c 'import sys; print(sys.version_info[0])') -eq 3 ] && PYTHON=$p
+    [ "$(command -v $p)" ] && [ -z "$PYTHON" ] && [ $($p -c 'import sys; print(sys.version_info[0])') -eq 3 ] && PYTHON=$p
 done
 if [ -z "$PYTHON" ]; then
     echo "ERROR: OGAgent needs Python 3" &>2
diff --git a/linux/scripts/ogagent b/linux/scripts/ogagent
index f06a004..ba83021 100755
--- a/linux/scripts/ogagent
+++ b/linux/scripts/ogagent
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 for p in python python3; do
-    [ -z "$PYTHON" ] && [ $($p -c 'import sys; print(sys.version_info[0])') -eq 3 ] && PYTHON=$p
+    [ "$(command -v $p)" ] && [ -z "$PYTHON" ] && [ $($p -c 'import sys; print(sys.version_info[0])') -eq 3 ] && PYTHON=$p
 done
 if [ -z "$PYTHON" ]; then
     echo "ERROR: OGAgent needs Python 3" &>2