How can I pipe stderr, and not stdout?

How can I pipe stderr, and not stdout?

bash grep stdout pipe stderr

bash

Pipe output and capture exit status in Bash

bash shell error-handling pipe

bash

How to detect if my shell script is running through a pipe?

bash shell pipe

bash

How to pipe stdout while keeping it on screen ? (and not to a output file)

bash shell pipe output stdout

bash

How to trick an application into thinking its stdout is a terminal, not a pipe

bash terminal pipe stdin

bash

Preserve colouring after piping grep to grep

linux bash colors grep pipe

bash

Piping command output to tee but also save exit code of command [duplicate]

bash shell pipe sh tee

bash

Why does cURL return error "(23) Failed writing body"?

macos bash curl osx-lion pipe

bash

Read values into a shell variable from a pipe

linux bash pipe

bash

With bash, how can I pipe standard error into another process?

bash pipe stderr

bash

Multiline syntax for piping a heredoc; is this portable?

bash shell pipe sh heredoc

bash

Bash variable scope

bash scope pipe

bash

How to execute the output of a command within the current shell?

bash shell unix pipe

bash

Split output of command by columns using Bash?

linux bash pipe

bash

How to pipe input to a Bash while loop and preserve variables after loop ends

bash while-loop stdin pipe

bash