Apr 3, 2012 · What does a dollar sign followed by an at-sign (@) mean in a shell script?
For example: umbrella_corp_options $@
Difference between $ {} and $ () in a shell script Ask Question Asked 10 years, 9 months ago Modified 1 year, 1 month ago
Shell equality operators (=, ==, -eq) Asked 12 years, 3 months ago Modified 3 years, 10 months ago Viewed 657k times
Sep 17, 2012 · Meaning of "=~" operator in shell script [duplicate] Ask Question Asked 13 years, 6 months ago Modified 12 years, 7 months ago
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.
Aug 1, 2019 · What does echo $?
mean in shell programming?
true echo $?
# echoes 0 false echo $?
# echoes 1 From the manual: (acessible by calling man bash in your shell) ?
Expands to the exit status.
Feb 20, 2011 · When going through one shell script, I saw the term "$?".
What is the significance of this term?
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.
Sep 14, 2012 · $!
is the PID of the most recent background command.
$0 is the name of the shell or shell script.
Most of the above can be found under Special Parameters in the Bash Reference.
