What is bash/zsh "|&" syntax mean? -

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what |& syntax means? example:

tree |& less

i see no difference tree |& less.

from bash manual:

command1 [ [| or |&] command2 …]

if |& used, standard error of command1 connected command2’s standard input through pipe; shorthand 2>&1 |. implicit redirection of standard error performed after redirections specified command.

in zsh too, |& shorthand 2>&1 |


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