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export myimage=/gpfs/slac/atlas/fs1/sw/singularity/slac-fermi.img.ext3 (or use the new image file)
Go inside the container:
1. singularity shell -B /afs:/afs -B /gpfs:/gpfs $myimage
2. By default, the prompt is changed to “Singularity> “. You are now in a shell and can do “ls”, “cd”, etc.
3. If you run command “id”, you will see you are running as yourself.
Run a command in the container:
1. singularity exec -B /afs:/afs -B /gpfs:/gpfs $myimage ls -l /afs
2. singularity exec -B /afs:/afs -B /gpfs:/gpfs $myimage sh /afs/slac/myscript.sh
3. The above is usually used in batch jobs.
“-B /afs:/afs” means bind mount (make /afs available inside the container, as path /afs)
1. Bind mount may not work well when running singularity on rhel6-64 machines, especially when autofs path (e.g. /nfs) is involved
2. By default, /tmp and your working directories are bind mounted.
3. on centos7, you can also bind mount nfs similarly.

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