command_substitution.md

Command Substitution

• $(command) or `command`
• Command substitution allows the output of a command to replace the command itself.
• Useful to assign output of a command to a variable

Example 1

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#### Demo 1

bash ./examples/subshell/command_substitution.sh

Example 2

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#### Demo 2

bash ./examples/subshell/assingment_to_var.sh

Example 3

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#### Demo 3

bash ./examples/subshell/stderr_redirection.sh

### References

• https://www.gnu.org/software/bash/manual/html_node/Command-Substitution.html#Command-Substitution