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When you execute a Bash script, it will at maximum use a single CPU thread, unless you start subshells/threads. If your machine has at least two CPU threads, you will be able to max-out CPU resources using multi-threaded scripting in Bash. The reason for this is simple; as soon as a secondary ‘thread’ (read: subshell) is started, then that subsequent thread can (and often will) use a different CPU thread. |
& operator
- In linux, this operator make shell to run the command in the background, that is, it is forked and run in a separate sub-shell, as a job, asynchronously
- Running command or script using &, that process will be run in background so that it is possible to keep doing other things in current shell.
- Examples are below. Just add & to end of command.
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