scroll back?

scroll back?

[Igor Gueths]

Hi listers. I have encountered the problem of let's say you are looking at usage for a particular program. And it scrolls to the next screen. Is there a way to be able to look at the previous screen? Like does the screen or the operating system keep a temporary buffer of the previous screen until refreshed by another shell command? What I'm refering to is something similar to a scroll back buffer that I believe used to exist in Dos. Does such a thing exist under Linux? I thought I read in some howto that the keystroke for this was alt+backspace or something? Thanks! 


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Re: scroll back?

[Kerry Hoath]

Shift-pageup and shift-pagedown activate the scrollback
feature in Linux but it doesn.t work with speakup
to my knowledge.
I use screen for this with the control-leftbracket keystroke and scroll back that way.
To make a command show usage and page the result do this:
ls --help 2>&1|less
the 2>&1 redirects standard error to standard output so you can page the result
through a pager.

regards, Kerry.
On Tue, Mar 26, 2002 at 06:33:10PM -0500, Igor Gueths wrote:
> Hi listers. I have encountered the problem of let's say you are looking at usage for a particular program. And it scrolls to the next screen. Is there a way to be able to look at the previous screen? Like does the screen or the operating system keep a temporary buffer of the previous screen until refreshed by another shell command? What I'm refering to is something similar to a scroll back buffer that I believe used to exist in Dos. Does such a thing exist under Linux? I thought I read in some howto that the keystroke for this was alt+backspace or something? Thanks! 
> 
> 
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> 
> 
> _______________________________________________
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> Speakup@braille.uwo.ca
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> 

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Kerry Hoath:  kerry@gotss.net kerry@gotss.eu.org or  kerry@gotss.spice.net.au
ICQ: 8226547 msn: kerry@gotss.net Yahoo: kerryhoath@yahoo.com.au

Re: scroll back?

[Gregory Nowak]

When this happens, I try piping the output through less, which doesn't work in allll cases.
Greg


On Tue, Mar 26, 2002 at 06:33:10PM -0500, Igor Gueths wrote:
> Hi listers. I have encountered the problem of let's say you are looking at usage for a particular program. And it scrolls to the next screen. Is there a way to be able to look at the previous screen? Like does the screen or the operating system keep a temporary buffer of the previous screen until refreshed by another shell command? What I'm refering to is something similar to a scroll back buffer that I believe used to exist in Dos. Does such a thing exist under Linux? I thought I read in some howto that the keystroke for this was alt+backspace or something? Thanks! 
> 
> 
> _________________________________________________________
> Do You Yahoo!?
> Get your free @yahoo.com address at http://mail.yahoo.com
> 
> 
> _______________________________________________
> Speakup mailing list
> Speakup@braille.uwo.ca
> http://speech.braille.uwo.ca/mailman/listinfo/speakup

Re: scroll back?

[Toby Fisher]

uOn Wed, 27 Mar 2002, Kerry Hoath wrote:

> To make a command show usage and page the result do this:
> ls --help 2>&1|less
> the 2>&1 redirects standard error to standard output so you can page the result
> through a pager.

Hmm, have never needed the 2>&1, don't know what I'll be missing then.
*grin*

Cheers.

-- 
Toby Fisher	Email: toby@g0ucu.freeserve.co.uk
Tel.: +44(0)1480 417272	Mobile: +44(0)7974 363239
ICQ: #61744808

Re: scroll back?

[Igor Gueths]

Hi Kerry. Do you mean a utility such as less? 
----- Original Message ----- 
From: Kerry Hoath <kerry@gotss.net>
To: <speakup@braille.uwo.ca>
Sent: Tuesday, March 26, 2002 9:14 PM
Subject: Re: scroll back?


> Shift-pageup and shift-pagedown activate the scrollback
> feature in Linux but it doesn.t work with speakup
> to my knowledge.
> I use screen for this with the control-leftbracket keystroke and scroll back that way.
> To make a command show usage and page the result do this:
> ls --help 2>&1|less
> the 2>&1 redirects standard error to standard output so you can page the result
> through a pager.
> 
> regards, Kerry.
> On Tue, Mar 26, 2002 at 06:33:10PM -0500, Igor Gueths wrote:
> > Hi listers. I have encountered the problem of let's say you are looking at usage for a particular program. And it scrolls to the next screen. Is there a way to be able to look at the previous screen? Like does the screen or the operating system keep a temporary buffer of the previous screen until refreshed by another shell command? What I'm refering to is something similar to a scroll back buffer that I believe used to exist in Dos. Does such a thing exist under Linux? I thought I read in some howto that the keystroke for this was alt+backspace or something? Thanks! 
> > 
> > 
> > _________________________________________________________
> > Do You Yahoo!?
> > Get your free @yahoo.com address at http://mail.yahoo.com
> > 
> > 
> > _______________________________________________
> > Speakup mailing list
> > Speakup@braille.uwo.ca
> > http://speech.braille.uwo.ca/mailman/listinfo/speakup
> > 
> 
> -- 
> Kerry Hoath:  kerry@gotss.net kerry@gotss.eu.org or  kerry@gotss.spice.net.au
> ICQ: 8226547 msn: kerry@gotss.net Yahoo: kerryhoath@yahoo.com.au
> 
> _______________________________________________
> Speakup mailing list
> Speakup@braille.uwo.ca
> http://speech.braille.uwo.ca/mailman/listinfo/speakup


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Re: scroll back?

[Igor Gueths]

Hi Toby. Thanks for the info. Is there more info as to why you use >2&1|? Why not something like redr=stdout|less? 
----- Original Message ----- 
From: Toby Fisher <toby_fisher@bigfoot.com>
To: <speakup@braille.uwo.ca>
Sent: Wednesday, March 27, 2002 11:42 AM
Subject: Re: scroll back?


> uOn Wed, 27 Mar 2002, Kerry Hoath wrote:
> 
> > To make a command show usage and page the result do this:
> > ls --help 2>&1|less
> > the 2>&1 redirects standard error to standard output so you can page the result
> > through a pager.
> 
> Hmm, have never needed the 2>&1, don't know what I'll be missing then.
> *grin*
> 
> Cheers.
> 
> -- 
> Toby Fisher Email: toby@g0ucu.freeserve.co.uk
> Tel.: +44(0)1480 417272 Mobile: +44(0)7974 363239
> ICQ: #61744808
> 
> 
> 
> _______________________________________________
> Speakup mailing list
> Speakup@braille.uwo.ca
> http://speech.braille.uwo.ca/mailman/listinfo/speakup


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Re: scroll back?

[Kerry Hoath]

Yes, I mean a pager.
less more and most are alll pagers.
Regards, Kerry.
On Wed, Mar 27, 2002 at 02:46:19PM -0500, Igor Gueths wrote:
> Hi Kerry. Do you mean a utility such as less? 
> ----- Original Message ----- 
> From: Kerry Hoath <kerry@gotss.net>
> To: <speakup@braille.uwo.ca>
> Sent: Tuesday, March 26, 2002 9:14 PM
> Subject: Re: scroll back?
> 
> 
> > Shift-pageup and shift-pagedown activate the scrollback
> > feature in Linux but it doesn.t work with speakup
> > to my knowledge.
> > I use screen for this with the control-leftbracket keystroke and scroll back that way.
> > To make a command show usage and page the result do this:
> > ls --help 2>&1|less
> > the 2>&1 redirects standard error to standard output so you can page the result
> > through a pager.
> > 
> > regards, Kerry.

-- 
Kerry Hoath:  kerry@gotss.net kerry@gotss.eu.org or  kerry@gotss.spice.net.au
ICQ: 8226547 msn: kerry@gotss.net Yahoo: kerryhoath@yahoo.com.au

Re: scroll back?

[Geoff Shang]

On Wed, 27 Mar 2002, Toby Fisher wrote:

> uOn Wed, 27 Mar 2002, Kerry Hoath wrote:
>
> > To make a command show usage and page the result do this:
> > ls --help 2>&1|less
> > the 2>&1 redirects standard error to standard output so you can page the result
> > through a pager.
>
> Hmm, have never needed the 2>&1, don't know what I'll be missing then.
> *grin*

Some programs send their help text to standard error, rather than standard
output.  I personally think that people who do this should have their head
read.  At any rate, the 2>&1 is needed for these programs to send standard
error to standard output.

Geoff.

Re: scroll back?

[Kerry Hoath]

Some programs like dd often run in a pipe.
It can be argued that if incorrect command-lines are given, the error
should indeed go to standard error. My feeling is that errors
should go to standard error and --help should go to standard output
since the --help option is exclusive. This is how most GNU tools behave but
it can not be relied upon.
Many programmers argue that help text for a filter should go to standard error
to prevent usage information being inadvertantly written to a pipe.
Perhapse they need their head read but there is method in the madness.

Regards, Kerry.
On Fri, Mar 29, 2002 at 09:49:55AM +1000, Geoff Shang wrote:
> On Wed, 27 Mar 2002, Toby Fisher wrote:
> 
> > uOn Wed, 27 Mar 2002, Kerry Hoath wrote:
> >
> > > To make a command show usage and page the result do this:
> > > ls --help 2>&1|less
> > > the 2>&1 redirects standard error to standard output so you can page the result
> > > through a pager.
> >
> > Hmm, have never needed the 2>&1, don't know what I'll be missing then.
> > *grin*
> 
> Some programs send their help text to standard error, rather than standard
> output.  I personally think that people who do this should have their head
> read.  At any rate, the 2>&1 is needed for these programs to send standard
> error to standard output.
> 
> Geoff.
> 
> 
> _______________________________________________
> Speakup mailing list
> Speakup@braille.uwo.ca
> http://speech.braille.uwo.ca/mailman/listinfo/speakup
> 

-- 
Kerry Hoath:  kerry@gotss.net kerry@gotss.eu.org or  kerry@gotss.spice.net.au
ICQ: 8226547 msn: kerry@gotss.net Yahoo: kerryhoath@yahoo.com.au

Scroll Back?

[Steve Holmes]

Is there any way one can scroll back the screen while in a regular
console with speakup enabled?  I thought someone had suggested the
shift page-up key but trying that did me nothing; nor did any other
combination of page-up keys and other control keys.  I am refering to
the page-up key on the six pack of keys.

Any ideas?