Update README.md

README.md

@@ -95,5 +95,6 @@ By default, your enroot containers will be saved in your home directory. On Berz
 Add this line to your ```bashrc```
 
 ```
+export ENROOT_CACHE_PATH=/proj/nsc_testing/xuan/enroot/cache
 export ENROOT_DATA_PATH=/proj/nsc_testing/xuan/enroot/data
 ```