boxes:tldr:46d38
This command is piping the contents of the variable string to the boxes command with the -r option.
-
echo "${string}"is anechocommand used to display the value of the variablestring. The double quotes"${string}"are used to prevent any word splitting or special character interpretation in the value ofstring. -
|is a pipe symbol used to redirect the output of theechocommand to the input of theboxescommand. -
boxesis a command-line tool used to draw various types of boxes and frames around text. It takes the input from the previous command through the pipe and formats it into a box according to the specified options. -
-ris an option for theboxescommand. It stands for "reverse" and is used to create a box with a reversed (inverted) appearance, where the background becomes the foreground color and vice versa.