Tagged Questions
6
votes
2answers
189 views
What is not shell specific?
Under some answers, I see comments that recommend avoiding shell specific commands in answers.
How do I know which commands, operators, etc exist in all shells? Is there a list of standards?
man ...
16
votes
5answers
2k views
Why is echo a shell built in command?
$ which echo
echo: shell built-in command.
$ which ls
/bin/ls
$ which cat
/bin/cat
Why is echo not an independent utility like ls, ps, cat etc? Why is it shell specific? Any good reasons?
