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echois a bad example of command substitution because 1) the output would have been displayed anyway, 2)printfis safer to use for variable data. The example could as well be writtendate | sed 's/^/Today is /'printf) is useless. I changed the phrasing a bit, from immediately tosometime later, is it more appealing?thedate=$(date), followed byprintf 'The date is %s\n' "$thedate".