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case:tldr:97bcb
The given command is a shell script command that uses the case statement to perform different actions based on the value of the variable $tocount
. Let's break it down step by step:
-
case ${$tocount} in ${words})
: This begins the case statement by specifying the variable"$tocount"
as the value to be evaluated. It checks if$tocount
matches the value${words}
. -
${wc -w README}; ;;
: If the value of$tocount
matches${words}
, the commandwc -w README
will be executed. This command uses thewc
utility to count the number of words in the fileREADME
. The double semicolon;;
signifies the end of this case block. -
${lines}) ${wc -l README}; ;;
: If the value of$tocount
does not match${words}
, it will be checked if it matches${lines}
. If it does, the commandwc -l README
will be executed. This command counts the number of lines in the fileREADME
. Again, the double semicolon;;
denotes the end of this case block. -
esac
: This is used to close the case statement.
In summary, this script allows for different actions to be taken depending on the value of $tocount
. If $tocount
matches ${words}
, it returns the word count of the file README
. If it matches ${lines}
, it returns the line count of README
.