Huge mailbox split?
in [Shell]
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From: John Kelly on 15 Jun 2010 12:20 On Tue, 15 Jun 2010 18:04:03 +0200, Tuxedo <tuxedo(a)mailinator.com> wrote: >I did 'man dd' but remain somewhat puzzled... I'm not familiar with the >command line options. I know I'm asking free advise here, but how would you >divide a file named for example myBigCrapBox into ten pieces using dd ? "count" limits the number of blocks copied "seek" determines the starting block "bs" sets the block size, for example bs=4k "if" is your input file "of" is your output file (creates if not existing) Experiment with some junk file till you get the hang of it. But be careful, you can really hurt yourself with dd while logged in as root. -- Web mail, POP3, and SMTP http://www.beewyz.com/freeaccounts.php
From: John Kelly on 15 Jun 2010 12:25 On Tue, 15 Jun 2010 16:20:20 +0000, John Kelly <jak(a)isp2dial.com> wrote: >"seek" determines the starting block Whoops! I meant skip, not seek >Experiment with some junk file till you get the hang of it. But be >careful, you can really hurt yourself with dd while logged in as root. See what I mean -- Web mail, POP3, and SMTP http://www.beewyz.com/freeaccounts.php
From: Tuxedo on 15 Jun 2010 12:46 John Kelly wrote: > On Tue, 15 Jun 2010 16:20:20 +0000, John Kelly <jak(a)isp2dial.com> wrote: > > > >"seek" determines the starting block > > Whoops! I meant skip, not seek > > > >Experiment with some junk file till you get the hang of it. But be > >careful, you can really hurt yourself with dd while logged in as root. > > See what I mean I think this is all too complex for my basic understanding of dd :-) Tuxedo
From: John Kelly on 15 Jun 2010 12:56 On Tue, 15 Jun 2010 18:46:54 +0200, Tuxedo <tuxedo(a)mailinator.com> wrote: >> >"seek" determines the starting block >> >> Whoops! I meant skip, not seek >> >> >> >Experiment with some junk file till you get the hang of it. But be >> >careful, you can really hurt yourself with dd while logged in as root. >> >> See what I mean > >I think this is all too complex for my basic understanding of dd :-) The five parameters I listed are all you need to break up the big file. If that seems too complex, you may be unable to solve your puzzle. -- Web mail, POP3, and SMTP http://www.beewyz.com/freeaccounts.php
From: Tuxedo on 15 Jun 2010 13:12
John Kelly wrote: > On Tue, 15 Jun 2010 18:46:54 +0200, Tuxedo <tuxedo(a)mailinator.com> > wrote: > > >> >"seek" determines the starting block > >> > >> Whoops! I meant skip, not seek > >> > >> > >> >Experiment with some junk file till you get the hang of it. But be > >> >careful, you can really hurt yourself with dd while logged in as root. > >> > >> See what I mean > > > >I think this is all too complex for my basic understanding of dd :-) > > The five parameters I listed are all you need to break up the big file. > If that seems too complex, you may be unable to solve your puzzle. Yes, it's beyond me. The syntax described in the man page is not clear to me as now is the first time I've come across the command and I'm not a programmer. There is not even an example in the in the man page on my system. I will search for some. Thanks for putting me on track. Tuxedo |