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What do [ and mean when used in an
if statement?
they stand for the test command
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What are the keywords used to mark a block of commands in an
if ... then statement?
then and fi
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What are the keywords used to mark the first block of commands in an
if ... then ... else statement?
then and fi
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What are the keywords used to mark the second block of commands in an
if ... then ... else statement?
else and fi
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What are the keywords used to mark the block of commands following
elif?
then and else or elif
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Is there any limit to the number of blocks of commands you can have in an
if ... else ... elif statement?
no
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How would you run the script do_something.sh if you wanted to
print each line of the script before it was executed?
bash -x do_something.sh
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If you were debugging a script as in the example above, how would Bash mark the lines of the script itself
to distinguish them from the output of the script?
by starting each line with a +
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What has to follow each
elif in an if ... else ... elif statement?
a Unix command
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How does the
test command indicate that the logical expression it is evaluating is true?
by returning a status code of 0