Index: TipAndDoc/.bashrc
===================================================================
--- TipAndDoc/.bashrc	(revision a53ff5b0b6601c61e10a4e3d746acbff4349a0a1)
+++ TipAndDoc/.bashrc	(revision 3c848da2dd19c0f86e8fe557dc3e484fa1853b60)
@@ -12,4 +12,9 @@
 shopt -s no_empty_cmd_completion    # no complementation with no input
 shopt -s histverify     # check command history before execute
+shopt -s histappend
+
+# unlimited history list
+export HISTFILESIZE=-1
+export HISTSIZE=-1