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Overview
If you have a supercomputing allocation, then your workflow will involve some of these steps.
The first is how do you perform authentication in the context of a (non-interactive) submitted job - use the delegate command.
pshell can be then run from the command line to perform stand alone commands.
It can also be given a script containing any number of commands that will be executed sequentially.
Exercises
create a delegate and check that pshell is using it.
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pshell
login
sean
????
delegate
exit
pshell whoami
script a task to download a file in your directory.
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pshell -i script1.txt
With the plain text file script1.txt created containing:
cd Demo/sean
get testfile1
bash script a task that attempts to perform something illegal (eg remove directory www) and correctly report that the script encountered an error
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Run the following script if you have bash ... sorry Windows users.
#!/bin/bash
if pshell "rmdir /www"
echo "Operation failed!"
else
eco "All good - proceed further!"
This would typically be a job script on (eg) Pawsey HPC - where you would be doing all such work in a Linux environment.
The idea is that if something in your data setup pipeline fails - don't waste any valuable cpu time on it.