Update .gitignore

.gitignore

@@ -1,3 +1,6 @@
+# Created by https://www.gitignore.io/api/c++,linux
+
+### C++ ###
 # Prerequisites
 *.d
 
@@ -30,3 +33,21 @@
 *.exe
 *.out
 *.app
+
+### Linux ###
+*~
+
+# temporary files which can be created if a process still has a handle open of a deleted file
+.fuse_hidden*
+
+# KDE directory preferences
+.directory
+
+# Linux trash folder which might appear on any partition or disk
+.Trash-*
+
+# .nfs files are created when an open file is removed but is still being accessed
+.nfs*
+
+
+# End of https://www.gitignore.io/api/c++,linux