Bash Command Substitution: Difference between revisions
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Command substitution allows us to take the stdout output of a command or [[Bash_Functions#Returning_Values|function]], which would normally be sent to stdout of the executing shell, and save it as the value of a variable. To do this we place the command or the function within brackets, preceded by a $ sign. | Command substitution allows us to take the stdout output of a command or [[Bash_Functions#Returning_Values|function]], which would normally be sent to stdout of the executing shell, and save it as the value of a variable. To do this we place the command or the function within brackets, preceded by a $ sign. | ||
<syntaxhighlight | <syntaxhighlight lang="bash"> | ||
... | ... | ||
local content | local content | ||
content=$(ps -ef) | content=$(ps -ef) | ||
</syntaxhighlight> | </syntaxhighlight> | ||
Revision as of 00:03, 16 July 2017
Internal
Overview
Command substitution allows us to take the stdout output of a command or function, which would normally be sent to stdout of the executing shell, and save it as the value of a variable. To do this we place the command or the function within brackets, preceded by a $ sign.
...
local content
content=$(ps -ef)