How do I find information on bash special parameters ($* $@ $# $? $- $$ $! $0 $_)?
59672
What are the special dollar sign shell variables?
34625
What is the difference between $* and $@?
11423
Understand the meaning of `$_`
153879
How to pass parameters to function in a bash script?
123399
Shell scripting: Way to parse parameters from command line
25742
How to debug a bash script?
38402
What is the meaning of the ${0##...} syntax with variable, braces and hash character in bash?
15609
What does this cryptic Bash command mean?
110452
Why does exclamation mark within double quotes cause a Bash error?
128374
what is $$ in bash?
2939
How do I parse command line arguments in Bash?
25046
^@^@ character in syslog
137445
Why is $ the default symbol for a user shell and # the default symbol for a root shell?
133569
What does the double slash mean in `${f// /_}`?
147454
Why does bash set $? (exit status) to non-zero on Ctrl-C or Ctrl-Z?
133797
Using binary data as a parameter in bash - any way to allow nuls?
81489
How to use a special character as a normal one in Unix shells?