What is the difference between "$a" and $a in unix
59166
When to wrap quotes around a shell variable?
38430
In PHP, what does the ${$ } syntax do?
134951
What is the difference between > and >> (especially as it relates to use with the cat program)?
72519
What's the difference between "==" and "=~"?
99330
Why do you need $ when accessing array and hash elements in Perl?
22609
What is the difference between "source x", ". x" and "./x" in Bash?
141593
What are the differences between executing shell scripts using "source file.sh", "./file.sh", "sh file.sh", ". ./file.sh"?
69292
What is $ sign in Mathematica?
30485
Why do I get different outputs in case of sh and bash?
57007
What is the meaning of $? in a shell script?
96938
What's the difference between using > and >> in shell?
108681
What is the $? (dollar question mark) variable in shell scripting?
34893
Is there a difference between the '&&' and ';' symbols in a standard BASH terminal?
64037
Difference between ' and " on command line (bash)?
977
What is the difference between [@] and [*] when referencing bash array values?
51432
What does the "$#" special parameter mean in Bash?
120372
How to typeset $:=$ correctly?