diff --git a/include/linux-system-usage.hpp b/include/linux-system-usage.hpp
deleted file mode 100644
index 03f26bf..0000000
--- a/include/linux-system-usage.hpp
+++ /dev/null
@@ -1,201 +0,0 @@
-/* ---------------------------------------------------------------------
- * Luiz Carlos doleron @ 2021
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero Public License version 3 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- * See the GNU Affero Public License for more details.
- * ----------------------------------------------------------------------
- */
-
- #ifndef _GET_CPU_USAGE_LINUX_
- #define _GET_CPU_USAGE_LINUX_
- 
- #include <iostream>
- #include <fstream>
- #include <sstream>
- #include <sys/statvfs.h>
- 
- namespace get_system_usage_linux
- {
- 
-	 struct CPU_stats
-	 {
-		 // see http://www.linuxhowtos.org/manpages/5/proc.htm
-		 int user;
-		 int nice;
-		 int system;
-		 int idle;
-		 int iowait;
-		 int irq;
-		 int softirq;
-		 int steal;
-		 int guest;
-		 int guest_nice;
- 
-		 int get_total_idle()
-		 const {
-			 return idle + iowait;
-		 }
- 
-		 int get_total_active()
-		 const {
-			 return user + nice + system + irq + softirq + steal + guest + guest_nice;
-		 }
- 
-	 };
- 
-	 struct Memory_stats
-	 {
-		 int total_memory;
-		 int available_memory;
-		 int total_swap;
-		 int free_swap;
- 
-		 float get_memory_usage() {
-			 const float result	= static_cast<float>(total_memory - available_memory) / total_memory;
-			 return result;
-		 }
- 
-		 float get_swap_usage() {
-			 const float result	= static_cast<float>(total_swap - free_swap) / total_swap;
-			 return result;
-		 }
- 
-	 };
- 
-	 inline CPU_stats read_cpu_data()
-	 {
-		 CPU_stats result;
-		 std::ifstream proc_stat("/proc/stat");
- 
-		 if (proc_stat.good())
-		 {
-			 std::string line;
-			 getline(proc_stat, line);
- 
-			 unsigned int *stats_p = (unsigned int *)&result;
-			 std::stringstream iss(line);
-			 std::string cpu;
-			 iss >> cpu;
-			 while (iss >> *stats_p)
-			 {
-				 stats_p++;
-			 };
-		 }
- 
-		 proc_stat.close();
- 
-		 return result;
-	 }
- 
-	 inline int get_val(const std::string &target, const std::string &content) {
-		 int result = -1;
-		 std::size_t start = content.find(target);
-		 if (start != std::string::npos) {
-			 int begin = start + target.length();
-			 std::size_t end = content.find("kB", start);
-			 std::string substr = content.substr(begin, end - begin);
-			 result = std::stoi(substr);
-		 }
-		 return result;
-	 }
- 
-	 inline Memory_stats read_memory_data()
-	 {
-		 Memory_stats result;
-		 std::ifstream proc_meminfo("/proc/meminfo");
- 
-		 if (proc_meminfo.good())
-		 {
-			 std::string content((std::istreambuf_iterator<char>(proc_meminfo)),
-					 std::istreambuf_iterator<char>());
- 
-			 result.total_memory = get_val("MemTotal:", content);
-			 result.total_swap = get_val("SwapTotal:", content);
-			 result.free_swap = get_val("SwapFree:", content);
-			 result.available_memory = get_val("MemAvailable:", content);
- 
-		 }
- 
-		 proc_meminfo.close();
- 
-		 return result;
-	 }
- 
-	 inline float get_cpu_usage(const CPU_stats &first, const CPU_stats &second) {
-		 const float active_time	= static_cast<float>(second.get_total_active() - first.get_total_active());
-		 const float idle_time	= static_cast<float>(second.get_total_idle() - first.get_total_idle());
-		 const float total_time	= active_time + idle_time;
-		 return active_time / total_time;
-	 }
- 
-	 inline float get_disk_usage(const std::string & disk) {
-		 struct statvfs diskData;
- 
-		 statvfs(disk.c_str(), &diskData);
- 
-		 auto total = diskData.f_blocks;
-		 auto free = diskData.f_bfree;
-		 auto diff = total - free;
- 
-		 float result = static_cast<float>(diff) / total;
- 
-		 return result;
-	 }
- 
-	 //see https://unix.stackexchange.com/questions/304845/discrepancy-between-number-of-cores-and-thermal-zones-in-sys-class-thermal/342023
- 
-	 inline int find_thermalzone_index() {
-		 int result = 0;
-		 bool stop = false;
-		 // 20 must stop anyway
-		 for (int i = 0; !stop && i < 20; ++i) {
-			 std::ifstream thermal_file("/sys/class/thermal/thermal_zone" + std::to_string(i) + "/type");
- 
-			 if (thermal_file.good())
-			 {
-				 std::string line;
-				 getline(thermal_file, line);
- 
-				 if (line.compare("x86_pkg_temp") == 0) {
-					 result = i;
-					 stop = true;
-				 }
- 
-			 } else {
-				 stop = true;
-			 }
- 
-			 thermal_file.close();
-		 }
-		 return result;
-	 }
- 
-	 inline int get_thermalzone_temperature(int thermal_index) {
-		 int result = -1;
-		 std::ifstream thermal_file("/sys/class/thermal/thermal_zone" + std::to_string(thermal_index) + "/temp");
- 
-		 if (thermal_file.good())
-		 {
-			 std::string line;
-			 getline(thermal_file, line);
- 
-			 std::stringstream iss(line);
-			 iss >> result;
-		 } else {
-			 throw std::invalid_argument(std::to_string(thermal_index) + " doesn't refer to a valid thermal zone.");
-		 }
- 
-		 thermal_file.close();
- 
-		 return result;
-	 }
- 
- }
- 
- #endif
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