[mdlug] UNIX tips: Learn 10 good UNIX usage habits

[Robert Citek]

On Sun, Mar 9, 2008 at 5:06 PM, Aaron Kulkis <akulkis3 at hotpop.com> wrote:
>  The "ultimate" example here
>
>  cmdA && _cmdB_to_run_only_if_cmdA_fails ||
>  cmdC_to_run_only_if_either_cmdA_or_cmd_B_succeeds

Did you mean to switch the operators:

cmdA || _cmdB_to_run_only_if_cmdA_fails &&
cmdC_to_run_only_if_either_cmdA_or_cmd_B_succeeds

For example:

$ true || true && echo yes
yes
$ true || false && echo yes
yes
$ false || true && echo yes
yes
$ false || false && echo yes

Or did you mean cmdC_to_run_only_if_either_cmdA_or_cmd_B_fail.

For example:

$ true && true || echo yes
$ true && false || echo yes
yes
$ false && true || echo yes
yes
$ false && false || echo yes
yes

Regards,
- Robert