Update HandsOn.md

workshop/HandsOn.md

@@ -293,8 +293,22 @@ In order to include host paths into your container use the `SINGULARITY_BIND` va
 
 e.g.
 ```bash
-# Binding /data on host to /mnt inside
-singularity exec --bind /data:/mnt my_container.sif ls /mnt
+# Directory does not exist by default
+singularity exec my_container.sif ls /data
+ls: cannot access '/data': No such file or directory
+# Binding /data on host to /data inside
+singularity exec --bind /data:/data my_container.sif ls /data
+log.txt
+```
+
+or using the environment variables:
+
+```bash
+# on the HOST system
+export SINGULARITY_BIND=/data:/data
+# execute singularity with no --bind options
+singularity exec my_container.sif ls /data
+log.txt
 ```