How to add timestamp to STDERR redirection

Question

In bash/ksh can we add timestamp to STDERR redirection?

E.g. myscript.sh 2> error.log

I want to get a timestamp written on the log too.

Answer 1

The program ts from the moreutils package pipes standard input to standard output, and prefixes each line with a timestamp.

To prefix stdout lines: command | ts
To prefix both stdout and stderr: command 2>&1 | ts