shell scripting

[Ping]

there is no good way with pure shell script without using expect-like kind of tools..

from iPhone


On Nov 10, 2013, at 0:23, pluto mars <plutomars955 at gmail.com> wrote:

> Hi,
> 
> I need some help with shell scripting (/bin/sh) in ubuntu.
> 
> In a shell script I want to turn down an interface, say eth0 and then turn it up. 
> So something like
> 
> ifdown eth0
> ifup eth0
> 
> But what I want in my shell script is to check and wait till eth0 is up and then start doing something next in my shell script.
> So something like "if ( eth0 not is up ) { sleep 1 }. But how do I do this in shell scripting ?
> 
> And then also I want something similar for checking if syslog process is up or not. Because actually I am writing syslog through that interface to another computer. So I want to check if eth0 is up. If up, check if syslog process is up, if not start, if yes, write something to syslog.
> 
> regards,
> 
> pluto
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