Running linux command from inside

Ruby
1

I’ve ran a search in ruby-talk but I couldn’t find an
answer so…

Can I run a linux command inside a ruby program. Like

history
=> 63 history
history -d63

Thanks
Jeff B.

2

On 7/11/07, Jeffrey B. [email protected] wrote:

I’ve ran a search in ruby-talk but I couldn’t find an
answer so…

Can I run a linux command inside a ruby program. Like

history
=> 63 history
history -d63

You are probably looking for `` or Kernel#system.

for example: puts ls /etc

3

Hi,

Am Mittwoch, 11. Jul 2007, 23:55:29 +0900 schrieb Jeffrey B.:

Can I run a linux command inside a ruby program. Like

history
=> 63 history
history -d63

`history’ is not a Linux “command”, it is a Bash command.

What for do you need a command history when you’re not on a
command line?

Bertram

4

Bertram S. wrote:

Hi,

Am Mittwoch, 11. Jul 2007, 23:55:29 +0900 schrieb Jeffrey B.:

Can I run a linux command inside a ruby program. Like

history
=> 63 history
history -d63

`history’ is not a Linux “command”, it is a Bash command.

What for do you need a command history when you’re not on a
command line?

Bertram

Since it is a Bash specific command why can’t you just run a Bash
command file using `` or system commands? That command file can contain
the Bash specific invocaion commands in the first line or any other
language for that matter. I don’t think it is a good idea to make your
client aware of the specificity of the called program.

5

On Thu, Jul 12, 2007, Chris T. wrote:

If you’re looking for a history inside of irb that you can play with, take a
look at something like
thishttp://gilesbowkett.blogspot.com/2007/06/irbrc-modifications.htmlhttp://gilesbowkett.blogspot.com/2007/06/irbrc-modifications.htmlbut
make sure you get his new
version http://pastie.caboo.se/71790, as I found a tiny bug in the old
one. Handy for getting all the history you’ve done inside irb, or even
writing it out to a file so you can make a script out of it, etc.

Whoa, I never saw this. Kinda wish you guys had let me know :wink: No
worries, though.

Thanks for the fixes. I needed to revisit this anyway, as there’s some
other stuff that doesn’t work. I’ll contact you and Giles off-list
about integrating your changes.

Ben

6

If you’re looking for a history inside of irb that you can play with,
take a
look at something like
thishttp://gilesbowkett.blogspot.com/2007/06/irbrc-modifications.htmlhttp://gilesbowkett.blogspot.com/2007/06/irbrc-modifications.htmlbut
make sure you get his new
version http://pastie.caboo.se/71790, as I found a tiny bug in the old
one. Handy for getting all the history you’ve done inside irb, or even
writing it out to a file so you can make a script out of it, etc.

Chris