[colug-432] Pausing

[Rick Hornsby]

Steve VanSlyck wrote:
> Hi Rick.
> Here are the lines from the script:
> # Install the dialog utility
> read -p "Invisible Island's dialog utility will be installed. See 
> http://invisible-island.net/dialog ."
> sleep 2s # or ping localhost -c 2 -i 2 > null
> yum -y install dialog
Right, so the reason it is pausing is because of your read command.  
That line is waiting for an EOF, which comes when you finally hit enter.

http://tldp.org/LDP/Bash-Beginners-Guide/html/sect_08_02.html
> (I cannot send to /dev/null because that requires sudo and that's a 
> pain for testing.)
Uh ...?  That doesn't sound right -or- like a badly configured host for 
this reason:

     http://man7.org/linux/man-pages/man4/null.4.html

     NOTES:
            If these devices are not writable and readable for all 
users, many
            programs will act strangely.

What makes you think /dev/null is not writable?


> For each one, execution stops until I press <enter>
> On Fri, May 15, 2015, at 20:44, Rick Hornsby wrote:
>> Steve VanSlyck wrote:
>>> I'd tried sleep 3s after trying sleep 3, which didn't work.
>> Need more context. Sleep is the correct command for pausing.
>> ./sleep_test.sh
>> Fri May 15 19:41:57 CDT 2015
>> Fri May 15 19:42:00 CDT 2015
>> aztec:bin rhornsby$ cat sleep_test.sh
>> #!/bin/bash
>> date
>> sleep 3
>> date
>>> Unfortunately your corrected ping local host doesn't work eether. 
>>> Want's me to press <enter>.
>>> On Fri, May 15, 2015, at 20:32, Mike Plemmons wrote:
>>>>
>>>> Try
>>>> sleep 3
>>>> ping localhost  -c 2 -I 3 > /dev/null
>>>>
>>>> On May 15, 2015 8:24 PM, "Steve VanSlyck" <s.vanslyck at postpro.net 
>>>> <mailto:s.vanslyck at postpro.net>> wrote:
>>>>
>>>>     I tried both of these in my script and neether one would continue.
>>>>     Both worked fine at the command line.
>>>>     Hints?
>>>>     sleep 3s
>>>>     ping localhost -c 2 -i 3 > nul
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