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Learn how to boost your Bash scripts' efficiency using concurrency and parallel execution techniques. The article explains the concepts of concurrency (handling multiple tasks simultaneously within a single application) and parallelism (performing many tasks at the same time across different processors). It discusses tools like the background execution ampersand (`&`), `wait` command, GNU Parallel, and `xargs` for implementing these techniques, and covers practical aspects such as dependency management and resource utilization to optimize performance.