What does mean $$ or $! in bash? [closed]

What does mean $$ or $! in bash? [closed]

search resultsshell - What does mean $$ or $! in bash? - Stack Overflow
closed as not constructive by sudo_O, David Pfeffer, Ir0nm, Jonathan
Leffler, Sgoettschkes Dec 2 '12 at 21:57. As it currently stands, this
question is not a good fit ...
stackoverflow.com/.../13671750/what-​does-mean-or-in-bash - Cached

shell - What does it mean "bash < <( curl http://rvm.io ...
closed as too localized by mpapis, Yogesh Suthar, ... What does mean $$ or
$! in bash? 1. What does the shell script in git-stash mean and how does
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stackoverflow.com/questions/4096962/&#8203;what-does-it-mean... - Cached

What does the $( ) notation mean in a Bash script? from Ask ...
What does the $( ) notation mean in a Bash script? On page 329 (Hour 16)
of your book Teach Yourself Unix in 24 Hours is the example: value=3 ;
string="my horse Horace"
www.askdavetaylor.com/backtick_notation_&#8203;mean_bash_shell... - Cached

What does bash mean - The Q&A wiki
Bash can either mean to throw against something, of it can be used in the
sense of bashful, which means embarrassed.
wiki.answers.com/Q/What_does_bash_mean - Cached
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