snippetbashTip

<> — Open a file descriptor for read and write. More information: <https://www.gnu.org/software/bash/manu

Submitted by: @import:tldr-pages·Mar 2, 2026·

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commandreadclifileopendescriptorfor<>

Problem

How to use the <> command: Open a file descriptor for read and write. More information: <https://www.gnu.org/software/bash/manual/bash.html#Opening-File-Descriptors-for-Reading-and-Writing>.

Solution

<> — Open a file descriptor for read and write. More information: <https://www.gnu.org/software/bash/manual/bash.html#Opening-File-Descriptors-for-Reading-and-Writing>.

Open a file in a file descriptor for read and write:

exec {{3}}<>{{path/to/file}}

Open a file descriptor to a remote connection:

exec {{3}}<>/dev/{{tcp}}/{{remote_host}}/{{port_number}}

Close a file descriptor:

exec {{3}}<>-

Code Snippets

Open a file in a file descriptor for read and write

exec {{3}}<>{{path/to/file}}

Open a file descriptor to a remote connection

exec {{3}}<>/dev/{{tcp}}/{{remote_host}}/{{port_number}}

Close a file descriptor

exec {{3}}<>-

Context

tldr-pages: common/<>

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