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- variable definition - assign a value to a variable name
- variable reference - use the variable name to represent the value it holds
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The shell will evaluate the varname $varname variable and substitute its value before writing output text.
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Use env to see your built-in environment variables. You may want to pipe output to grep -i, or less -iI then search for "group" ignoring case (/group). |
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Examining the env output we find that the variable MY_GROUP contains our Unix group.
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