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- The problem statement, all variables and given/known data:
what these lines of coding are doing?
- Relevant commands, code, scripts, algorithms:
[ -z "$SMQUEUE" ] && SMQUEUE="$QUEUE"
[ -z "$SMQUEUE" ] && SMQUEUE=1h
- The attempts at a solution (include all code and scripts):
I know that it is doing something like setting the system mail queue to 1 hour? but i do not understand what the -z and rest of it is doing?
- School (University) and Course Number:
Bond 131532