diff --color -ur a/Makefile b/Makefile
--- a/Makefile	2021-04-16 13:02:41.416453040 +0200
+++ b/Makefile	2021-04-16 13:21:23.020089623 +0200
@@ -1,3 +1,4 @@
+PREFIX = /usr/local
 SHELL = /bin/sh
 MAIN_NAME=sls
 CLIENT_NAME=slc
@@ -64,3 +65,16 @@
 	rm -f $(OUTPUT_PATH)/*.o
 	rm -rf $(BIN_PATH)/*
 
+install: all
+	@echo installing executable files to ${DESTDIR}${PREFIX}/bin
+	@mkdir -p "${DESTDIR}${PREFIX}/bin"
+	@cp -f ${BIN_PATH}/${MAIN_NAME} "${DESTDIR}${PREFIX}/bin"
+	@chmod 755 "${DESTDIR}${PREFIX}/bin/${MAIN_NAME}"
+	@cp -f ${BIN_PATH}/${CLIENT_NAME} "${DESTDIR}${PREFIX}/bin"
+	@chmod 755 "${DESTDIR}${PREFIX}/bin/${CLIENT_NAME}"
+
+uninstall:
+	@echo removing executable files from ${DESTDIR}${PREFIX}/bin
+	@rm -f "${DESTDIR}${PREFIX}/bin/${MAIN_NAME}"
+	@rm -f "${DESTDIR}${PREFIX}/bin/${CLIENT_NAME}"
+
diff --color -ur a/slscore/HttpClient.cpp b/slscore/HttpClient.cpp
--- a/slscore/HttpClient.cpp	2021-04-16 13:02:41.416453040 +0200
+++ b/slscore/HttpClient.cpp	2021-04-16 13:11:40.343866698 +0200
@@ -90,7 +90,7 @@
 		goto FUNC_END;
 	}
 	if (NULL != method && strlen(method) > 0) {
-		sprintf(m_http_method, method);
+		strcpy(m_http_method, method);
 	}
 
 	m_interval = interval;
diff --color -ur a/slscore/SLSLog.cpp b/slscore/SLSLog.cpp
--- a/slscore/SLSLog.cpp	2021-04-16 13:02:41.416453040 +0200
+++ b/slscore/SLSLog.cpp	2021-04-16 13:08:16.836119519 +0200
@@ -85,7 +85,7 @@
     vsnprintf (buf , 4095 , fmt , vl);
     //sprintf(buf_info, "%s %s: %s\n" , cur_time, LOG_LEVEL_NAME[level], buf);
     sprintf(buf_info, "%s:%03d %s %s: %s\n" , cur_time, cur_time_msec, APP_NAME, LOG_LEVEL_NAME[level], buf);
-    printf(buf_info);
+    puts(buf_info);
 
     if (m_log_file) {
         fwrite(buf_info, strlen(buf_info), 1, m_log_file);
diff --color -ur a/slscore/SLSSrt.cpp b/slscore/SLSSrt.cpp
--- a/slscore/SLSSrt.cpp	2021-04-16 13:02:41.417452995 +0200
+++ b/slscore/SLSSrt.cpp	2021-04-16 13:10:11.004957820 +0200
@@ -124,7 +124,7 @@
     std::map<int, std::string>::iterator it;
     for(it=map_error.begin(); it!=map_error.end(); ++it) {
         sprintf(szBuf, "%d: %s\n", it->first, it->second.c_str());
-        printf(szBuf);
+        puts(szBuf);
     }
     printf("----------end------------\n");
     map_error.clear();