diff --git a/cis/private/lehre/menu.php b/cis/private/lehre/menu.php
index e16a25a82..34c802e96 100644
--- a/cis/private/lehre/menu.php
+++ b/cis/private/lehre/menu.php
@@ -408,7 +408,7 @@ function js_toggle_container(conid)
 								if(!is_dir('../../../documents/'.strtolower($short)))
 									exec('mkdir -m 775 "../../../documents/'.strtolower($short).'"');
 								exec('mkdir -m 775 "../../../documents/'.strtolower($short).'/download"');
-								exec('sudo chgrp teacher ../../../documents/'.strtolower($short).'/download');
+								exec('chgrp teacher ../../../documents/'.strtolower($short).'/download');
 							}
 						}
 						if(is_dir($path))
diff --git a/cis/private/lehre/pinboard.php b/cis/private/lehre/pinboard.php
index 8606d6b26..dbaef8028 100644
--- a/cis/private/lehre/pinboard.php
+++ b/cis/private/lehre/pinboard.php
@@ -676,7 +676,7 @@ function show(id)
 							if(!is_dir('../../../documents/'.strtolower($short)))
 								exec('mkdir -m 775 "../../../documents/'.strtolower($short).'"');
 							exec('mkdir -m 775 "../../../documents/'.strtolower($short).'/lehrziele"');
-							exec('sudo chgrp teacher ../../../documents/'.strtolower($short).'/lehrziele');
+							exec('chgrp teacher ../../../documents/'.strtolower($short).'/lehrziele');
 						}
 					}
 
diff --git a/cis/private/lehre/upload.php b/cis/private/lehre/upload.php
index 849385b4c..fcee044b4 100644
--- a/cis/private/lehre/upload.php
+++ b/cis/private/lehre/upload.php
@@ -633,14 +633,14 @@ A:hover {
 													  {
 													  	 if(copy($_FILES[$file]['tmp_name'], $uploadfile))
 													  	 {
-													  	 	 exec('chmod 644 "'.$uploadfile.'"');
+													  	 	 exec('chmod 664 "'.$uploadfile.'"');
 															 if($islector)
 															 {
-																exec('sudo chown '.$user.':teacher "'.$uploadfile.'"');
+																exec('chgrp teacher "'.$uploadfile.'"');
 															 }
 															 else
 															 {
-																exec('sudo chown '.$user.':student "'.$uploadfile.'"');
+																exec('chgrp student "'.$uploadfile.'"');
 															 }
 													  	 }
 													  }
@@ -656,14 +656,14 @@ A:hover {
 												  {
 													  if(copy($_FILES[$file]['tmp_name'], $uploadfile))
 													  {
-													  	  exec('chmod 644 "'.$uploadfile.'"');
+													  	  exec('chmod 664 "'.$uploadfile.'"');
 														  if($islector)
 														  {
-															exec('sudo chown '.$user.':teacher "'.$uploadfile.'"');
+															exec('chgrp teacher "'.$uploadfile.'"');
 														  }
 														  else
 														  {
-															exec('sudo chown '.$user.':student "'.$uploadfile.'"');
+															exec('chgrp student "'.$uploadfile.'"');
 														  }
 													  }
 												  }
@@ -689,14 +689,14 @@ A:hover {
 														  {
 														  	   if(copy($_FILES[$file]['tmp_name'], $uploadfile))
 														  	   {
-														  	   	   exec('chmod 644 "'.$uploadfile.'"');
+														  	   	   exec('chmod 664 "'.$uploadfile.'"');
 																   if($islector)
 																   {
-																		exec('sudo chown '.$user.':teacher "'.$uploadfile.'"');
+																		exec('chgrp teacher "'.$uploadfile.'"');
 																   }
 																   else
 																   {
-																		exec('sudo chown '.$user.':student "'.$uploadfile.'"');
+																		exec('chgrp student "'.$uploadfile.'"');
 																   }
 														  	   }
 														  }
@@ -712,14 +712,14 @@ A:hover {
 													  {
 														  if(copy($_FILES[$file]['tmp_name'], $uploadfile))
 														  {
-														  	  exec('chmod 644 "'.$uploadfile.'"');
+														  	  exec('chmod 664 "'.$uploadfile.'"');
 															  if($islector)
 															  {
-																exec('sudo chown '.$user.':teacher "'.$uploadfile.'"');
+																exec('chgrp teacher "'.$uploadfile.'"');
 															  }
 															  else
 															  {
-																exec('sudo chown '.$user.':student "'.$uploadfile.'"');
+																exec('chgrp student "'.$uploadfile.'"');
 															  }
 														  }
 													  }
@@ -848,11 +848,11 @@ A:hover {
 
 									if($islector)
 									{
-										exec('sudo chown www-data "'.$dest_create_dir->path.'/'.$new_dir_name_text.'"');
+										exec('chgrp teacher "'.$dest_create_dir->path.'/'.$new_dir_name_text.'"');
 									}
 									else
 									{
-										exec('sudo chown www-data "'.$dest_create_dir->path.'/'.$new_dir_name_text.'"');
+										exec('chgrp student "'.$dest_create_dir->path.'/'.$new_dir_name_text.'"');
 									}
 								}
 							}
diff --git a/include/tw/cis_menu_lv.inc.php b/include/tw/cis_menu_lv.inc.php
index 49d763a34..e050257f2 100644
--- a/include/tw/cis_menu_lv.inc.php
+++ b/include/tw/cis_menu_lv.inc.php
@@ -84,46 +84,46 @@
 			if(!is_dir($dir_name))
 			{
 					exec('mkdir -m 775 "'.$dir_name.'"');
-					exec('sudo chown www-data:teacher "'.$dir_name.'"');
+					exec('chown www-data:teacher "'.$dir_name.'"');
 			}					
 							
 		  	/*
 		  	if(!@is_dir($DOC_ROOT.'/documents'))
 			{
 					exec('mkdir -m 775 "'.$DOC_ROOT.'/documents'.'"');
-					exec('sudo chown www-data:teacher "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'"');				
+					exec('chown www-data:teacher "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'"');				
 			}
 			*/					
 					
 		  //SEMESTERPLAN
 		  	$dir_name=$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name).'/semesterplan';
-			if(!is_dir($dir_name))
+			/*if(!is_dir($dir_name))
 			{
 					exec('mkdir -m 775 "'.$dir_name.'"');
-					exec('sudo chown www-data:teacher "'.$dir_name.'"');
-			}
+					exec('chown www-data:teacher "'.$dir_name.'"');
+			}*/
 		  	$dest_dir = @dir($dir_name);
 		  	if(!@is_dir($dest_dir->path))
 			{
 				if(!@is_dir($DOC_ROOT.'/documents/'.mb_strtolower($kurzbz)))
 				{
 					exec('mkdir -m 775 "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'"');
-					exec('sudo chown www-data:teacher "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'"');
+					exec('chown www-data:teacher "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'"');
 				}
 				if(!@is_dir($DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester))
 				{
 					exec('mkdir -m 775 "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'"');
-					exec('sudo chown www-data:teacher "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'"');
+					exec('chown www-data:teacher "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'"');
 				}
 				if(!@is_dir($DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name)))
 				{
 					exec('mkdir -m 775 "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name).'"');
-					exec('sudo chown www-data:teacher "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name).'"');
+					exec('chown www-data:teacher "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name).'"');
 				}
 				if(!@is_dir($DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name).'/semesterplan'))
 				{
 					exec('mkdir -m 775 "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name).'/semesterplan"');
-					exec('sudo chown www-data:teacher "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name).'/semesterplan"');
+					exec('chown www-data:teacher "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name).'/semesterplan"');
 				}
 			}
 
@@ -177,33 +177,33 @@
 		<?php
 		//DOWNLOAD
 		  	$dir_name=$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name).'/download';
-			if(!is_dir($dir_name))
+			/*if(!is_dir($dir_name))
 			{
 					exec('mkdir -m 775 "'.$dir_name.'"');
-					exec('sudo chown www-data:teacher "'.$dir_name.'"');
-			}
+					exec('chown www-data:teacher "'.$dir_name.'"');
+			}*/
 		  	$dest_dir = @dir($dir_name);
 		  	if(!@is_dir($dest_dir->path))
 			{
 				if(!@is_dir($DOC_ROOT.'/documents/'.mb_strtolower($kurzbz)))
 				{
 					exec('mkdir -m 775 "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'"');
-					exec('sudo chown www-data:teacher "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'"');
+					exec('chown www-data:teacher "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'"');
 				}
 				if(!@is_dir($DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester))
 				{
 					exec('mkdir -m 775 "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'"');
-					exec('sudo chown www-data:teacher "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'"');
+					exec('chown www-data:teacher "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'"');
 				}
 				if(!@is_dir($DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name)))
 				{
 					exec('mkdir -m 775 "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name).'"');
-					exec('sudo chown www-data:teacher "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name).'"');
+					exec('chown www-data:teacher "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name).'"');
 				}
 				if(!@is_dir($DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name).'/download'))
 				{
 					exec('mkdir -m 775 "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name).'/download"');
-					exec('sudo chown www-data:teacher "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name).'/download"');
+					exec('chown www-data:teacher "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name).'/download"');
 				}
 			}
 
@@ -270,33 +270,33 @@
 
   	//Leistungsuebersicht
   	$dir_name=$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name).'/leistung';
-	if(!@is_dir($dir_name))
+	/*if(!@is_dir($dir_name))
 	{
 		exec('mkdir -m 775 "'.$dir_name.'"');
-		exec('sudo chown www-data:teacher "'.$dir_name.'"');
-	}
+		exec('chown www-data:teacher "'.$dir_name.'"');
+	}*/
   	$dest_dir = @dir($dir_name);
-  	if(!is_dir($dest_dir->path))
+  	if(!@is_dir($dest_dir->path))
 	{
 		if(!@is_dir($DOC_ROOT.'/documents/'.mb_strtolower($kurzbz)))
 		{
 			exec('mkdir -m 775 "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'"');
-			exec('sudo chown www-data:teacher "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'"');
+			exec('chown www-data:teacher "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'"');
 		}
 		if(!@is_dir($DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester))
 		{
 			exec('mkdir -m 775 "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'"');
-			exec('sudo chown www-data:teacher "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'"');
+			exec('chown www-data:teacher "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'"');
 		}
 		if(!@is_dir($DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name)))
 		{
 			exec('mkdir -m 775 "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name).'"');
-			exec('sudo chown www-data:teacher "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name).'"');
+			exec('chown www-data:teacher "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name).'"');
 		}
 		if(!@is_dir($DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name).'/leistung'))
 		{
 			exec('mkdir -m 775 "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name).'/leistung"');
-			exec('sudo chown www-data:teacher "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name).'/leistung"');
+			exec('chown www-data:teacher "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name).'/leistung"');
 		}
 	}
 
@@ -531,33 +531,33 @@
 			echo '<td class="tdvertical" align="center">';
 			//Studentenabgabe
 		  	$dir_name=$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name).'/upload';
-			if(!@is_dir($dir_name))
+			/*if(!@is_dir($dir_name))
 			{
 				exec('mkdir -m 775 "'.$dir_name.'"');
-				exec('sudo chown www-data:teacher "'.$dir_name.'"');
-			}
+				exec('chown www-data:student "'.$dir_name.'"');
+			}*/
 		  	$dest_dir = @dir($dir_name);
 		  	if(!@is_dir($dest_dir->path))
 			{
 				if(!@is_dir($DOC_ROOT.'/documents/'.mb_strtolower($kurzbz)))
 				{
 					exec('mkdir -m 775 "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'"');
-					exec('sudo chown www-data:teacher "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'"');
+					exec('chown www-data:teacher "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'"');
 				}
 				if(!@is_dir($DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester))
 				{
 					exec('mkdir -m 775 "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'"');
-					exec('sudo chown www-data:teacher "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'"');
+					exec('chown www-data:teacher "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'"');
 				}
 				if(!@is_dir($DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name)))
 				{
 					exec('mkdir -m 775 "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name).'"');
-					exec('sudo chown www-data:teacher "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name).'"');
+					exec('chown www-data:teacher "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name).'"');
 				}
 				if(!@is_dir($DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name).'/upload'))
 				{
 					exec('mkdir -m 775 "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name).'/upload"');
-					exec('sudo chown www-data:mysql "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name).'/upload"');
+					exec('chown www-data:student "'.$DOC_ROOT.'/documents/'.mb_strtolower($kurzbz).'/'.$semester.'/'.mb_strtolower($short_short_name).'/upload"');
 				}
 			}