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tldr/pages/common/readonly.md
parthzz 768f6203d2
readonly: add page (#10786) 
* readonly: add page

* Update readonly.md

* Update readonly.md

* Update pages/common/readonly.md

Co-authored-by: Reinhart Previano Koentjoro <reinhart_previano@yahoo.com>

* Update readonly.md

* Update pages/common/readonly.md

Co-authored-by: Jack Lin <blueskyson1401@gmail.com>

* Update pages/common/readonly.md

* Update pages/common/readonly.md

* Update pages/common/readonly.md

---------

Co-authored-by: Reinhart Previano Koentjoro <reinhart_previano@yahoo.com>
Co-authored-by: Jack Lin <blueskyson1401@gmail.com>
2023-10-02 12:54:14 +08:00

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readonly

Create or modify read-only variables within a shell script, preventing the variable from being changed by subsequent commands. This is useful when you want to ensure that a variable retains a constant value throughout the execution of a script. More information: https://manned.org/readonly.1p.

  • Create a read-only variable:

readonly {{variable_name}}={{value}}

  • Mark a variable as read-only:

readonly {{existing_variable}}

  • [p]rint to the standard output the names and values of all read-only variables:

readonly -p