Why do we double-quote a dollar sign evaluation in Bash?
32028
When is double-quoting necessary?
35545
How to properly escape exclamation points in bash?
51432
What does the "$#" special parameter mean in Bash?
60829
Double and triple substitution in bash and zsh
148772
Backslashes in single quoted strings vs. double quoted strings
98451
Why can't I echo the characters #! in a string in bash?
60843
How can I echo dollar signs?
83225
Difference between single and double square brackets in Bash
71795
What does the Bash operator <<< (i.e. triple less than sign) mean?
38430
In PHP, what does the ${$ } syntax do?
131823
Why is setting a variable before a command legal in bash?
59672
What are the special dollar sign shell variables?
158457
Using | pipe character from a $variable makes it treat as just another argument in bash; how to escape it?
95320
Why are square brackets preventing shell expansion?
47449
What is the difference between . (dot) and $ (dollar sign)?
15762
Are \( and \) preferable to dollar signs for math mode?
77615
Why does the less-than sign not work as a replacement for cat in bash?