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1. What is on Your Mind?
where I'm working does not have any AIX box/servers for testing eventhough we're not heavily invested on UNIX. It is just sometimes there are a few client's servers that need AIX related stuff to be done.
last time I checked, I could find old AIX tower on ebay but there's no more.
p/s: on job... (4 Replies)
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2. AIX
Hi all,
I am trying to exchange hostname and IP address of two AIX machines.
But i am confused as how to change it ?
do i need to use "smitty mktcpip" or "smitty tcpip" ?
what is the difference between smitty mktcpip and smitty tcpip ?
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3. AIX
Hi Gurus ,
I am having AIX servers for which DR needs to be settle down soon. Can you guide how to calculate the bandwidth sizing for Storage based replication.What factor i need to consider or calculate for Bandwidth sizing.
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4. AIX
This is the password aging script for aix just completed. So far tested and still testing on one of our aix server running 5.3.0.0. So anyway as you can see it is very similar to pwage-hpux-T the only difference on aix /etc/passwd file looks in this format. Also for this script to work you need to... (0 Replies)
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5. AIX
Guy's
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6. AIX
Hi, I am very new & I am upgrading the AIX OS 5.3 to 6.1 by CD/DVD media. Before Upgrading I must backup the data, right? I have to boot from CD then the server will start the process. So during the upgrading, the applications of this AIX Box will be accessible to the Apps users or not? ... (1 Reply)
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7. AIX
:(
Hi Grue, I am very new in AIX/UNIX environment. Please give me answer that during the upgrading or Migrating to 6.1 the AIX Server the applications of this server is accessible to Apps users or not? Thanks (2 Replies)
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8. AIX
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I have a new project where I have to migrate about 150+ database environments from various solaris systems running Solaris 8 / 10 and residing on very different sun boxes (from 25k down to ancient/unsupported hardware) to AIX (power6).
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9. UNIX for Dummies Questions & Answers
Hi all,
Our application has to send Fax to our cutomer Fax number .
I am using lpr -P faxser:test-fax <<dos format file>>
I tested on our network Fax numbers . Its working fine.
But when i try to send outside our network , its not sending
all files are sitting in... (1 Reply)
Discussion started by: help_need
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10. AIX
Hi,
I want to synchronize time on several AIX servers - I don't want to set very precise time value, but I want all the servers to have same time value.
How do I do that ?
thanks
Vilius (2 Replies)
Discussion started by: vilius
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Fax Formats(1) General Commands Manual Fax Formats(1)
SYNOPSIS
This page, part of the Netpbmuser'sguide(1) , describes FAX formats in relation to Netpbm facilities.
DESCRIPTION
The ITU (formerly CCITT) publishes standards for operation of fax machines (the idea is to provide a way to be sure that a fax machine is
able to receive a fax sent by another). These standards incidentally specify graphics file formats -- a protocol for representing a visual
image in sequences of bits.
The two relevant standards are called Group 3 (G3) and Group 4 (G4) (Groups 1 and 2 are analog standards no longer in use). Virtually
every fax machine in existence conforms at least generally to at least one of these standards.
The standard for Group 3 fax is defined in ITU Recommendation T.4. In the U.S., that is implemented by EIA standards EIA-465 and EIA-466.
These standards cover more than the file format as well, including how to transmit bits over a telephone line and procedures for handling
document transmissions.
G3 faxes are 204 dots per inch (dpi) horizontally and 98 dpi (196 dpi optionally, in fine-detail mode) vertically.
The standards specify three file formats (also called coding methods and compression schemes -- remember the standard doesn't mention com-
puter files; it talks about the format of a stream of bits travelling over a telephone line):
MH This compresses in one dimension: it compresses individual raster lines but makes no attempt to compress redundancy between lines.
One dimensional compression is traditionally the best a fax machine could handle because G3 neither assumes error free transmission
not retransmits when errors occur, and receiving fax machines traditionally could not afford to buffer much of a page. It's impor-
tant that when there is an error in a raster line, its impact not spread to many lines after it.
All Group 3 and Group 4 fax machines must be able to send and receive MH.
MH is sometimes called 'G3,' but that is a poor name because while the Group 3 standard does specify MH, it has always specified
other formats too.
MH is sometimes called 'T4' based on the name of the document that specifies it, ITU T.4. But this is a poor name because T.4 also
specifies MR.
MR This compresses in two dimensions, horizontally and vertically.
MR has always been part of the Group 3 standard, but is optional (a Group 3 fax machine may or may not be able to send and receive
it).
MMR This is a more advanced format than the others. It is even more two-dimensional than MR. It is optional in the Group 3 standard,
and didn't even exist in earlier versions of it. It was developed specifically for the Group 4 standard, but then added to an
extended Group 3 standard as well.
MMR is sometimes called Group 4, but that is a poor name because of the fact that it is also part of the current Group 3 standard.
MMR is sometimes called 'T6' based on the name of the document
that specifies it, ITU T.6.
g3topbm converts the MH format to PBM. pbmtog3 converts PBM to MH.
There is no Netpbm program to convert to or from other fax formats.
TIFF
The TIFF format is flexible enough to allow lots of different coding methods, within it. There are TIFF subformats for MH, MR, and MMR,
among others. These are particularly useful when you receive a fax as a TIFF file.
tifftopnm recognizes and can convert from any of these.
pamtotiff can convert to any of these; you use command options to choose which.
netpbm documentation 03 December 2008 Fax Formats(1)