Why does 2>&1 need to come before a | (pipe) but after a "> myfile" (redirect to file)?

Why does 2>&1 need to come before a | (pipe) but after a "> myfile" (redirect to file)?

bash shell pipe stdout pipeline

shell

closing stdout of piped python subprocess

python shell subprocess pipeline

shell

Ignore HUP signal in Bash script with pipe commands

bash shell pipe signals pipeline

shell

Pipe to export command

bash shell terminal pipeline xargs

shell

Executing Gstreamer pipeline script within php code

php shell gstreamer pipeline

shell

why echo return value ($?) after pipeline always return "0"

shell echo pipeline

shell

Idiomatic Analog to Ruby's `Object#tap` for Unix command Pipelines?

ruby bash shell unix pipeline

shell

C Minishell Adding Pipelines

c shell unix pipe pipeline

shell

In a shell (bash) How can I execute more than one command in a pipeline?

bash shell awk pipeline

shell

How to cause a Linux pipeline to fail?

shell pipe posix pipeline

shell

How to continuously read pcap file while it is also still being written?

bash shell file pipeline pcap

shell

How can I add syntax highlighting to a make error message?

bash shell awk cmake pipeline

shell

Is an infinite loop possible in Unix shell using just redirection and pipelines?

shell unix redirect infinite-loop pipeline

shell

print line number of output in shell script

shell pipeline

shell