From: Peter Vandenabeele <peter@...>
Date: 2010-11-29T21:50:36+09:00
Subject: Re: why i can't find my ruby ?

On Mon, Nov 29, 2010 at 1:43 PM, Pen Ttt <myocean135@yahoo.cn> wrote:
> pt@pt:~$ which  ruby
> /usr/bin/ruby
> pt@pt:~$ ls -l   `which ruby`
> lrwxrwxrwx 1 root root 24 2010-11-29 16:00 /usr/bin/ruby ->
> /usr/local/ruby/bin/ruby
> pt@pt:~$ ls -l `which ruby | sed -e 's/ruby//'` | grep irb
> pt@pt:~$
>
> there is nothing  for the last command
> ls -l `which ruby | sed -e 's/ruby//'` | grep irb

(caveat, not actually tried, from memory).

So now try:

$ cd /usr/bin
$ sudo ln -s  /usr/local/ruby/bin/irb irb

After that, the command:

$ ls -l `which ruby | sed -e 's/ruby//'` | grep irb

should show the symlink as on my computer.

and

$ which irb

should work.

You could also add to your .bashrc a line like:

PATH=/usr/local/ruby/bin:"${PATH}"

this wlll make all those command in /usr/local/ruby/bin available

HTH,

Peter