Re: operators available in bash versions

[Antonio Macchi]

Gerard wrote:
> I apologize for asking what is probably a dumb question, but where can
> I find a definitive listing of what features are available in each
> version of Bash.
>
> For example, I only have access to Bash-4 on my system. I need to know
> if " $(< " also works on Bash < 4. I also have a few questions
> regarding array handling.
>
> I am running FreeBSD-7.2 and installed Bash via ports.


could this be a good way to achive this?


$ wget http://ftp.gnu.org/gnu/bash/bash-2.0.tar.gz
--2009-11-30 19:08:52--  http://ftp.gnu.org/gnu/bash/bash-2.0.tar.gz
Resolving ftp.gnu.org... 140.186.70.20
Connecting to ftp.gnu.org|140.186.70.20|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 1349450 (1.3M) [application/x-tar]
Saving to: `bash-2.0.tar.gz.1'

100%[======================================>] 1,349,450    285K/s   in 
5.6s

2009-11-30 19:09:09 (237 KB/s) - `bash-2.0.tar.gz.1' saved [1349450/1349450]

$ tar -zxf bash-2.0.tar.gz bash-2.0/doc/FAQ -O | grep "What.s new in 
version"
10) What's new in version 2.0?
10) What's new in version 2.0?

$ wget http://ftp.gnu.org/gnu/bash/bash-3.0.tar.gz

[etc.]