I was recently reading about subshells in linux. An example used was sleep 10.
(sleep 10) - subshell sleep 10& - background process coproc sleep 10
It was written that the first command executes in a subshell. The second is the background process without involving a subshell. And the third one was a combination of both.
I had tested using
ps -ef and all of these commands show the creation of a subshell. Is there any difference between background process using & and and subshells? Also coproc seems to do the same thing. I am totally confused. Any light on the topic would be appreciated.