printf:tldr:dc9bc

The command printf -v ${myvar} ${"This is %s = %d\n" "a year" 2016} is used to format a string and assign it to a variable in the Bash shell.

Here's a breakdown of the command:

• printf: It is a command in Bash used to format and print output.
• -v ${myvar}: It signifies that the formatted string should be assigned to the variable myvar.
• ${"This is %s = %d\n" "a year" 2016}: This part is the format string and its arguments. It uses the syntax ${stringValue variable1 variable2 ...} to specify the format string and its values.
  • "This is %s = %d\n" is the format string which contains placeholders %s and %d. %s is a placeholder for a string, and %d is a placeholder for an integer.
  • "a year" is the value that will be substituted for %s.
  • 2016 is the value that will be substituted for %d.

So, overall, the command will assign the formatted string "This is a year = 2016\n" to the variable myvar.