Apr 3, 2012 · What does a dollar sign followed by an at-sign (@) mean in a shell script? For example: umbrella_corp_options $@

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I'm trying to learn shell scripting, and I need to understand someone else's code. What is the $? variable hold? I can't Google search the answer because they block punctuation characters.

Sep 17, 2012 · Meaning of "=~" operator in shell script [duplicate] Asked 13 years, 2 months ago Modified 12 years, 3 months ago Viewed 96k times

In shell scripts, what is the difference between $@ and $*? Which one is the preferred way to get the script arguments? Are there differences between the different shell interpreters about this?

What does $# mean in shell? I have code such as if [ $# -eq 0 ] then I want to understand what $# means, but Google search is very bad for searching these kinds of things.

Difference between $ {} and $ () in a shell script Ask Question Asked 10 years, 4 months ago Modified 9 months ago

Shell equality operators (=, ==, -eq) Asked 11 years, 11 months ago Modified 3 years, 5 months ago Viewed 647k times

Aug 1, 2019 · What does echo $? mean in shell programming?true echo $? # echoes 0 false echo $? # echoes 1 From the manual: (acessible by calling man bash in your shell) ? Expands to …

Oct 4, 2016 · I understand the basic difference between an interactive shell and a non-interactive shell. But what exactly differentiates a login shell from a non-login shell? Can you give …