Linux command
parenthesis 命令
文本
涉及管道、覆盖或删除，执行前请先确认路径和参数。
常用示例
Run commands in a subshell
(cd [/tmp] && [command])
Create an array
array=([one] [two] [three])
Command grouping without subshell
{ [command1]; [command2]; }
Function definition
function_name() { [commands]; }
Arithmetic evaluation
(( count++ ))
说明
Parentheses ( ) in shell have several distinct uses depending on context: Subshell execution: Commands in (...) run in a child shell. Environment changes (cd, variable assignments) don't affect the parent shell. Array literals: In bash/zsh, array=(a b c) creates an array. Function definition: name() { ... } defines a function (parentheses are part of syntax, not grouping). Command substitution: $(...) captures command output. Arithmetic: ((...)) performs arithmetic evaluation, $((...)) expands to the result.
FAQ
What is the parenthesis command used for?
Parentheses ( ) in shell have several distinct uses depending on context: Subshell execution: Commands in (...) run in a child shell. Environment changes (cd, variable assignments) don't affect the parent shell. Array literals: In bash/zsh, array=(a b c) creates an array. Function definition: name() { ... } defines a function (parentheses are part of syntax, not grouping). Command substitution: $(...) captures command output. Arithmetic: ((...)) performs arithmetic evaluation, $((...)) expands to the result.
How do I run a basic parenthesis example?
Run `(cd [/tmp] && [command])` in a terminal, then adjust file names, paths, flags, or remote targets for your system.
Where can I find more parenthesis examples?
This page includes 5 examples for parenthesis, plus related commands for nearby Linux tasks.