how does the expression b=${b:-"/data"} work
32658
What does `:-` mean in a shell script
26771
Understanding backtick (`)
140227
How variables inside braces are evaluated
89546
Where is the `--` (double dash) argument documented?
94766
How does double arrow (=>) operator work in Perl?
25478
What does ${1+"$@"} mean in a shell script, and how does it differ from "$@"?
42711
What does $$ mean in the shell?
5528
Difference between $:=$ and $=$
82369
What does #{...} mean?
8820
Meaning of backtick in floating-point literal
38402
What is the meaning of the ${0##...} syntax with variable, braces and hash character in bash?
83028
What is <<<_END?
26948
How does this [t]ricky bracket expression in grep work?
57348
What is the difference between the dot (.) operator and -> in C++?
34304
Precedence of the shell logical operators &&, ||
128374
what is $$ in bash?
39485
Why does ('0' ? 'a' : 'b') behave different than ('0' == true ? 'a' : 'b')