Fix issue with python-is-python3 not working and python being missing…

… in later debian/ubuntu versions

operating_system.go

@@ -16,7 +16,7 @@ func rebootRequired() bool {
 	}
 	if agent.linux == "centos" {
 		out, _ := runner.Run("needs-restarting", "-r")
-		return strings.Contains(out,"Reboot is required")
+		return strings.Contains(out, "Reboot is required")
 	}
 	if agent.linux == "suse" {
 		out, _ := runner.Run("zypper", "ps", "-s")
@@ -84,7 +84,7 @@ func checkPreReqs() {
 			_, err := runner.Run("apt-get", "update")
 			out, err := runner.Run("apt-get", "install", "python", "-y")
 			if err != nil {
-				panic(err)
+				logging.LogMsg("error installing python, trying fallbacks: " + err.Error())
 			}
 			logging.LogMsg(out)
 		}
@@ -103,8 +103,10 @@ func checkPreReqs() {
 		// Specifically for Ubuntu 21+/Debian11+
 		out, err := runner.Run("python", "trex.py")
 		if err != nil {
-			logging.LogMsg("error running python-apt: " + err.Error())
-			if strings.Contains(out, "ImportError: No module named apt") {
+			logging.LogMsg("error running python-apt(err): " + err.Error())
+			logging.LogMsg("error running python-apt(out): " + out)
+			if strings.Contains(out, "ImportError: No module named apt") ||
+				strings.Contains(err.Error(), "executable file not found in") {
 				logging.LogMsg("installing python-is-python3")
 				_, err := runner.Run("apt-get", "install", "python-is-python3", "-y")
 				if err != nil {