Re: [newbie] manage command-line scroll
--- Peter Rymshaw <[EMAIL PROTECTED]> wrote: > Thanks everyone re: the | more solution. I thought > that only worked inside a file. Important Unix concept here. Unix has 3 default "files" for every command. These are: stdin (standard input), stdout (output) and stderr (error). Every command you run opens these three automatically. Usually stdin is your keyboard, while stdout and stderr are your screen. You have the power to redirect these to wherever you want when you invoke a command. That's what > and < do (with filenames!). > directs stdout to a file, while < says that stdin is to come from a file. The fact that stderr is different is cool - for example, a find command from / will return access errors for unmounted filesystems. If you use >, those error messages till come to the screen, while stdout happily goes to the file. (in fact, you can redirect stderr too: just use 2>). These 3 "files" are ALWAYS opened. Commands that take filenames as arguments often re-use one or more of these. For example, cat file1 will display the contents of file1. But if you type in cat by itself, it looks like nothing happens - except your command prompt has disappeared! In fact, what's happened is that it's opened stdin (by default) and will display the contents. Try it. You can then type something in and whenever you hit Enter it will display what you type! Use Ctrl-C to exit. A pipe (i.e. |) simply connects stdout from the command to the left of | to stdin command to the right. The command more file1 is just like cat file1 (of course, with screen pauses) - what I mean is that if you type in more by itself, it expects input from stdin. That's why locate | more works - since more doesn't have an argument which tells it the file to display, it draws its input from stdin. The pipe has linked stdin to stdout from the locate command. Of course, this is an ENORMOUS subject - pipes and redirection are the guts of Unix and is where it draws its true power. (My first day on VMS: "Hey, how do you do a pipe here???"). I've tried to make this as clear as possible in as few words as possible. There a tons of reference material out there, but I'm just trying to explain the underlying concept here. Understand this concept and Unix suddenly will become a LOT clearer! Regards, Ron. __ Do You Yahoo!? Get email alerts & NEW webcam video instant messaging with Yahoo! Messenger http://im.yahoo.com Want to buy your Pack or Services from MandrakeSoft? Go to http://www.mandrakestore.com
Re: [newbie] manage command-line scroll
Thanks everyone re: the | more solution. I thought that only worked inside a file. Using the scroll bar in KDE term is even better. Don't know how I missed that. Thanks. --- d <[EMAIL PROTECTED]> wrote: > LURKER, here again. I find the "locate" command > works great in a 'term' > just fine. There is a scroll bar usually on the > right side of the window > when accessing from KDE, BTW you can put that scroll > bar on the left side > under "Options" if you like. > > At 03:09 PM 9/2/01, you wrote: > >Isn't there some way to control the way that > >information is spewed out (more than a screenfull) > in > >Linux? I find the "locate" command so much better > than > >doing "Find" with KDE. but I don't know how to stop > it > >from scrolling off the page before I can read it. > > And if you also like you can do " locate [the info > you need] | (pipe > symbol) more", WFM. HTH! > > >I know that there are things like "less" for text > >files, but don't know of anything that works on the > >command line itself. I'm thinking of something like > >DOS's /w and /p. > > > >Thanks anyone. > > > >Pete R. > > > >Want to buy your Pack or Services from > MandrakeSoft? > >Go to http://www.mandrakestore.com > > TIA, > 'd' > [EMAIL PROTECTED] > San Antonio, Texas > > > > Want to buy your Pack or Services from MandrakeSoft? > > Go to http://www.mandrakestore.com > Want to buy your Pack or Services from MandrakeSoft? Go to http://www.mandrakestore.com
Re: [newbie] manage command-line scroll
LURKER, here again. I find the "locate" command works great in a 'term' just fine. There is a scroll bar usually on the right side of the window when accessing from KDE, BTW you can put that scroll bar on the left side under "Options" if you like. At 03:09 PM 9/2/01, you wrote: >Isn't there some way to control the way that >information is spewed out (more than a screenfull) in >Linux? I find the "locate" command so much better than >doing "Find" with KDE. but I don't know how to stop it >from scrolling off the page before I can read it. And if you also like you can do " locate [the info you need] | (pipe symbol) more", WFM. HTH! >I know that there are things like "less" for text >files, but don't know of anything that works on the >command line itself. I'm thinking of something like >DOS's /w and /p. > >Thanks anyone. > >Pete R. > >Want to buy your Pack or Services from MandrakeSoft? >Go to http://www.mandrakestore.com TIA, 'd' [EMAIL PROTECTED] San Antonio, Texas Want to buy your Pack or Services from MandrakeSoft? Go to http://www.mandrakestore.com
Re: [newbie] manage command-line scroll
At 01:09 PM 9/2/01 -0700, you wrote: >Isn't there some way to control the way that >information is spewed out (more than a screenfull) in >Linux? I find the "locate" command so much better than Oopsie, my bad That should read "locate file | more" Want to buy your Pack or Services from MandrakeSoft? Go to http://www.mandrakestore.com
Re: [newbie] manage command-line scroll
At 01:09 PM 9/2/01 -0700, you wrote: >Isn't there some way to control the way that >information is spewed out (more than a screenfull) in >Linux? I find the "locate" command so much better than ls | more Want to buy your Pack or Services from MandrakeSoft? Go to http://www.mandrakestore.com
Re: [newbie] manage command-line scroll
> Isn't there some way to control the way that > information is spewed out (more than a screenfull) in Most progs that send stuff to stdout (i.e., your screen) can be piped to 'more'. So, in this situation, you'd do 'locate | more' and read the output one page at a time. > command line itself. I'm thinking of something like > DOS's /w and /p. IIRC, those switches were only in one program (DIR). Piping to 'more' is a (erm) more general solution. Also, if you have a 'regular' console, ctrl-s and ctrl-q should work. For xterms, if you start them up so that they have a sufficient scroll back buffer (xterm -sb some number) then you can use the scrollbar. > Pete R. David E. Fox Thanks for letting me [EMAIL PROTECTED]change magnetic patterns [EMAIL PROTECTED] on your hard disk. --- Want to buy your Pack or Services from MandrakeSoft? Go to http://www.mandrakestore.com
[newbie] manage command-line scroll
Isn't there some way to control the way that information is spewed out (more than a screenfull) in Linux? I find the "locate" command so much better than doing "Find" with KDE. but I don't know how to stop it from scrolling off the page before I can read it. I know that there are things like "less" for text files, but don't know of anything that works on the command line itself. I'm thinking of something like DOS's /w and /p. Thanks anyone. Pete R. Want to buy your Pack or Services from MandrakeSoft? Go to http://www.mandrakestore.com
