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What symbols come before an option on the command line?
- or --
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What is the program the collects the characters you type at the command line?
tty device driver
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When does this program send what you have typed at the command line to the shell?
when you hit Enter on a PC or Return on a Mac
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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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Does the shell check that a program gets the arguments or options it needs?
no, that is the responsibility of the program itself
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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 the shell do after it runs the program the user entered at the command line?
it goes into an inactive state called sleep
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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