what's the difference between bash my_script and source my_script

Question

Both of two lines below seems to execute my_script. What's the difference between the two processes?

$ bash my_script
$ source my_script

Also see: https://unix.stackexchange.com/questions/270966/what-is-the-difference-between-using-bash-and-sh-to-run-a-script — muru, Jun 16 '19 at 06:36

score 0 · Answer 1 · edited Jun 16 '19 at 07:02

0

A major different is that bash runs in a subprocess, while source is as if you are running the content:

$ cat my_script
echo $$
$ bash my_script
85183
$ source my_script
1581
$ echo $$
1581

edited Jun 16 '19 at 07:02

muru

answered Jun 16 '19 at 06:58

user358082

So is the line $ bash my_script the same as simply calling the script name $ my_script? – Jack Chen Jun 16 '19 at 10:58

1 Answers1