stderr To Stdout (2>&1)

Use

command >log.txt 2>&1

What It Does

2>&1 sends stderr to the same destination stdout uses at that moment.

Order Matters

command >combined.log 2>&1

This sends stdout to combined.log, then sends stderr there too.

command 2>&1 >stdout.log

This sends stderr to the old stdout first, then redirects stdout. The result is different.

Docs Pointers

• Read stderr redirection, I/O, file descriptors, and stream redirection.