[Slugnet] yum question

[Michael Clark]

Rob Kramer wrote:
> On 02 December 2008, Michael Clark wrote:
>   
>> machine B:
>>    yum install $(<package.list)
>>     
>
> Off-topic: what's the point of the extra $(..) here? I haven't seen this 
> construct before together with the '<' operator, but then again I've long 
> since accepted that I'll never understand all of bash (or equivalent).
>   

It is a way to substitute the result of something executing in a 
subshell. an alternative to backticks

echo $(ls)

is equivalent to

echo `ls`