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What does the PATH shell variable contain?
the list of directories the shell must search
to find the file to run a command
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If you wanted to run the executable script work.sh
in your current directory without using
bash, what
would you type at the command line?
./work.sh
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What is a process?
a running program
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What does a program do just before it stops running?
it sends an exit status to the shell
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What does an exit status of 0 mean?
it means that the program encountered no errors
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By default, where does Standard Input come from?
the keyboard
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By default, where does Standard Output go?
to the screen
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By default, where does Standard Error go?
to the screen
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If you wanted to send the output of
ls to the file dir_listing.txt, what would you
enter at the command line?
ls > dir_listing.txt
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If you wanted the program do_something to take input from the file
data.txt what would you write at the command line?
do_something < data.txt