o word and then return its value.[7]
Purpose:
Setting a variable to a default value if it is undefined....
The first two of these operators are ideal for setting defaults for command-line arguments in case the u... signment to IFS doesn't affect our current shell. Setting the IFS to a "colon" tells the shell to treat tha... into raw mode using the stty command. We save the settings before dd is invoked and then restore them after