diff --git a/main/main.cpp b/main/main.cpp
index fdf836c..1bef42a 100644
--- a/main/main.cpp
+++ b/main/main.cpp
@@ -28,6 +28,8 @@ int main(int argc, char** argv)
            std::cout << "OUTPUT ------------------------ OUTPUT\n" << std::endl;
            //Memory that is used now
            //outprint of all memory
+       } else if (eingabe != "exit"){
+           std::cout << eingabe << " <- is not a known command" << std::endl;
        }
     }
     return 0;
diff --git a/src/SharedMemory.cpp b/src/SharedMemory.cpp
index 77520f6..ff81723 100644
--- a/src/SharedMemory.cpp
+++ b/src/SharedMemory.cpp
@@ -1,14 +1,20 @@
 #include <cstdlib>
 #include "SharedMemory.h"
 #include <iostream>
+#include <fstream>
 
 key_t changedKey()
 {
+    std::ofstream keyFile;
+    keyFile.open("key.log", std::ofstream::out | std::ofstream::trunc);
+    keyFile.clear();
     int newKey;
     std::cout << "Type in a new Key for the Shared Memory Segment" << std::endl;
     std::cout << "new Key#";
     std::cin >> newKey;
     std::cout <<"New Key is -> " << newKey << std::endl;
+    keyFile << newKey;
+    keyFile.close();
     return key_t(newKey);
 }
 
@@ -36,9 +42,7 @@ void initSharedMemory(void) {
             std::string answer = getAnswerFromUser();
             if(answer.compare("y") == 0)
             {
-                std::cout << "Please type in a new Key:\n";
-                std::cout << "#";
-                std::cin >> impl.sharedMemoryKey;
+                impl.sharedMemoryKey = changedKey();
                 std::cout << "new Try with Key:c " << impl.sharedMemoryKey << std::endl;
                 initSharedMemory();
             } else if(answer.compare("n") == 0) {
diff --git a/src/SharedMemory.h b/src/SharedMemory.h
index 96aefca..344aacc 100644
--- a/src/SharedMemory.h
+++ b/src/SharedMemory.h
@@ -12,4 +12,6 @@
 void deleteSharedMemory(int s);
 void deleteSharedMemory(void);
 void initSharedMemory(void);
+key_t changedKey();
+std::string getAnswerFromUser();
 #endif //SHARED_MEMORY_H
diff --git a/src/key.log b/src/key.log
new file mode 100644
index 0000000..bd41cba
--- /dev/null
+++ b/src/key.log
@@ -0,0 +1 @@
+12345
\ No newline at end of file