Archives of linuxvm.org
01/01/2002 - Rob van der Heij reported that he
has created a VNC RPM for the Red Hat Linux/390 distribution. He comments
"Install at least vnc-3.3.3r2-19.s390.rpm and the vnc-server one to run
a vnc server on your Linux for S/390."
01/02/2002 - Ulrich Weigand of IBM reminded
everyone that with the new 2.4 kernel, if you choose the "cdl" disk layout
for your DASD that you need to run dasdfmt first, then fdasd to create one to
three disk partitions, and then run mke2fs.
01/03/2002 - In response to a question about
how you would get a secure (encrypted) TN3270 link, several people weighed in
with techniques and advice.
01/04/2002 - Mark Post reported a humor column
by Dave Barry that gave "...a very truthful, and hence hilarious, look at MS
Windows® from a non-techie perspective..."
01/04/2002 - Ed Holder-Vale reported a problem
with a SuSE 7.0 (2.2.16 kernel) LPAR installation that went into a CPU loop every
time. Lasse Mangen advised him to define only one CPU to the LPAR instead of
three, and that corrected the problem.
01/04/2002 - Dincer Ulutas reported a USA Today
online article about Microsoft Windows® Division VP Brian Valentine's internal
memo about how MS is escalating its "war against Linux." Mark Post reported the
URL of the article by The Register that was referenced by USA Today.
01/05/2002 - In response to a question about
how to do decimal arithmetic on S/390, Ulrich Weigand of IBM posted a pointer
to the online Principles of Operation chapter on decimal instructions.
01/05/2002 - Neale Ferguson posted a pointer to a
VM/CMS program and documentation that "...allows a user to enter the name of
the Linux guest and the address of the task structure of a specific process and
to then be able to scroll through the virtual storage of that process." More
details about the program are in the documentation, and in Neale's post.
01/07/2002 - Neale Ferguson reported an IBM
press release: IBM Extends Server Lead with 6.5 Point Market Share Gain Year
to Year; Sun Plummets 6.3 Points. (Ah, the smell of hyperbole in the air...)
01/08/2002 - Neale Ferguson reported a LinuxToday story about IBM whitepapers on Linux security. Mark Post reported the actual URLs of the papers.
01/08/2002 - Mark Post reported that the samba.org
web site is celebrating the 10th anniversary of Samba, including a link to the
original Usenet post by Andrew Tridgell announcing a "0.5 version" of a package
that would allow access to Sun disks from Windows®. They're also pointing to the
results of a PC Magazine performance test of Samba versus Windows® 2000. In all three
cases, Samba "won."
01/10/2002 - In response to a question about a Perl
mailing list, Patrick Mason posted a link to an online version of the book "Perl 5
by Example" by David Medinets.
01/10/2002 - Harald Hoyer of Red Hat announced a new
preview version of the Red Hat Linux/390 kernel: 2.4.9-20.1. The details of the
changes can be found in his posting as it's rather long.
01/12/2002 - In response to a question about
Linux/390 application development tools, David Goodenough recommended Eclipse.
According to the verbiage at the Eclipse web site,
01/13/2002 - In a bizarre/convoluted follow-up
to the application development tools thread, the existence of "XML databases"
was discussed. Neale Ferguson was being a little coy about SoftwareAG's Tamino
product, got questioned by Alan Cox, and was backed up by Holger Baxmann who
explained that Tamino "is a native (no marshalling, not hierarchical to
relational mapping) xml db; and it means xml schma is the db metadata and
xslt is performed on db engine level..." If you understand that, you
should probably be subjected to random cough syrup testing. Holger also
provided URLs to SoftwareAG's web site, and also pointed out xmldb.org.
01/13/2002 - A discussion about the maintenance
of Linux/390's system clock led to a discussion of the usual NTP software, and
Dave Jones posted this:
01/14/2002 - Lionel Dyck reported that a new
version of PuTTY (0.52) had been released.
01/15/2002 - In response to a question about how to
create an ext3 file system instead of ext2, Bernhard Rosenkraenzer stated "ext3
is just a newer version of ext2 - to create an ext3 filesystem, use mke2fs -j.
01/15/2002 - In response to a request for an
online version of the G6 Overview manual from IBM, Leo Smith of IBM posted two
links. The Resource Link site requires a userid and password for access. According
to Leo, IBM customers should have no problem getting those. Leo also mentioned
that if someone is unable to locate a particular IBM manual, they can use the
"Contact OS/390" or "Contact z/OS" forms to ask for help in finding it.
01/15/2002 - Dave Jones reported news story that
talks about Intel and BMC Software investing in "...Aduva, a company that
seeks to simplify installation and management of Linux systems..."
01/15/2002 - Neale Ferguson posted a pointer to
a new article on Linux/390.
01/16/2002 - Rob van der Heij reported that he had
put out a new version of his ICKDSF bootstrap loader for Linux/390 due to some
offsets in the parameter area changing between kernel releases.
01/16/2002 - In response to a question about disk space needed for installing WebSphere Commerce Suite, Bruce Hayden reported what was used at his site:
01/17/2002 - Peter Grimm reported a problem with
the Red Hat 2.4 kernel. The CP command specified in the VMHALT kernel parameter
not being executed when the "shutdown" or "halt" commands
were issued from a REXX exec. If the commands were issued from a bash prompt,
the VMHALT parameter was being honored. This discrepancy was not being seen
with a 2.2.16 kernel, only with the 2.4 series. Florian La Roche commented that
the VMHALT parameter is only supported in non-SMP 2.4 kernels, but this doesn't
explain why issuing shutdown or halt from a bash prompt produces the desired
01/17/2002 - Michael Coffin posted a link to the
IBM VM Download page, where the CMSDDR package can be found. This package allows
you to create a CMS file that contains a DDR dump of a minidisk or volume. This
allows the transmission of the dump to another location, where it can be restored
just as though a DDR tape had been shipped.
01/17/2002 - Axel Wirbser of IBM reported
some updated OCO modules for Red Hat's Linux/390:
01/17/2002 - In response to a question about how a
site could have a "root shell" session running on the console, without explicitly
logging in, Alan Cox posted this link to the "Autologin Patch for mingetty."
Implementing this would be roughly equivalent to Michael Kershaw's bootshell.cc program
which "hangs around," listening for interesting things such as a message
to shutdown the guest image. As the site says, "Note that there are security
implications inherent in this type of scheme. Using this feature means that you're
willing to forego normal password authentication for logins at the console. Unless
you're very confident in the physical security of your computer console, you
shouldn't do this."
#!/bin/sh # # # Name: /sbin/suloginv (shell script) # console root shell for Linux in a virtual machine # Date: 2000-Sep-16 (Sun) # # CONSOLE="$1" if [ -z "$CONSOLE" ] ; then CONSOLE=/dev/console ; fi PS1=`hostname` #PS1="$PS1 # " PS1="$PS1 \\\$ " export PS1 SHELL=/bin/sh if [ -x /sbin/sh ] ; then SHELL=/sbin/sh ; fi exec $SHELL -i 0<$CONSOLE 1>$CONSOLE 2>$CONSOLEhttp://users.jagunet.com/~kodis/autologin/autologin.html
01/17/2002 - Neale Ferguson and David Boyes
posted some information about an updated version of the Oracle 9i DBMS for
Linux/390 and a new, 64-bit version for Linux for zSeries.
01/17/2002 - Gordon Wolfe posted a short description
of how to use VM V-disks for Linux/390 swap devices. As he says "This doesn't
use any allocated disk, but puts your swap into virtual storage, which means into
XSTORE and paging DASD. It requires a little setup, but is much faster than Linux
01/17/2002 - Red Hat did not include the LVM tools with their Linux/390 distribution because of what they consider to be problems with LVM currently. In response to a question about other methods to "aggregate" DASD volumes, Alan Cox talked about md (multidisk) raid 0, and the raidtools that are part of Linux. He also included a brief example of some parameters that could be put into /etc/raidtab. This particular example is a raid 1 setup to mirror two SCSI disks.
raiddev /dev/md0 raid-level 1 nr-raid-disks 2 chunk-size 64k persistent-superblock 1 nr-spare-disks 0 device /dev/sda1 raid-disk 0 device /dev/sdb1 raid-disk 1"The raidstart command binds and sets up the raid volumes (in your case raid 0 which is not truely raid)" For more information on how to use the software RAID capabilities of Linux, read the HOWTO at the link below.
01/18/2002 - Dennis Musselwhite gave this tip for sites running Guest Lans under z/VM:
#cp q nic details"(...should tell you whether the READ/WRITE/DATA roles have been assigned yet by the interface... and which IP Addresses have been set by this interface). In this case, since qeth.o did not find the device it will probably just show you the initial state (all three devices unassigned)."
01/21/2002 - Dougie Lawson wrote a perl script to help people calculate a number of network-related numbers from an IP address and netmask. The script can be invoked from the command line, or as a CGI on a web server. He has licensed it under the GPL. For a sample input of IP=220.127.116.11 and netmask=255.255.255.192, it generated this output:
01/21/2002 - In response to a question
about how to easily figure out RPM pre-requisites, Alan Cox had some
clarifications about the various parts of Red Hat involved in this.
"Anaconda is the initial installer
apt-get update [packagename]and it will do all the needed work for me - fetching files, doing dependancies finding any other package needed, working out which is the newest source of a package and so on.
01/22/2002 - Axel Wirbser of IBM reported the following updates to the DeveloperWorks web site:
01/23/2002 - Florian La Roche of Red Hat
announced that he had uploaded a new development version of Red Hat 7.2.
According to Florian, "The current version should only have bug-fixes
in it, but we might decide to upload more unstable versions anytime. You
have been warned."
01/23/2002 - The mailing list got its first
confirmed report of a working OSA card running on Red Hat's 7.2 platform.
Dave Meyers stated that he needed the IBM OCO modules dated 01/15/2002 to
get things to work for him.
01/23/2002 - During a discussion about
converting packages from one type of system to another, the "alien"
package was mentioned. Stefan Gybas provided the link below and commented
"...alien can be used to convert RPMs, Slackware and Stampede
packages from and to Debian packages. However, this only works for packages
that don't contain distribution-specific installation/removal scripts. As a
simple rule of thumb: If a RPM works on all RPM-based distributions then
the converted package works on Debian."
01/23/2002 - Jim Sibley presented some good
information on sharing an OSA card between LPARs. This has been added to the
Linux/390 HOWTO page.
01/24/2002 - Jason McMullan posted information
on how to set up a HyperSocket VM Guest LAN. This also has been added to the
Linux/390 HOWTO page.
01/24/2002 - Colman Fink posted the URL to a
story on a large increase in the number of Linux installations in Asia. The
article quotes a Gartner analyst who says this may be "due to a backlash
against Microsoft's new software licensing scheme."
01/24/2002 - In response to a question about why VNC
still needed a patch to compile on Linux/390, Ross Patterson pointed out that AT&T
Research hasn't produced a release of VNC for anything other than MS Windows® since
October 2000. The patch to VNC to get it to compile on Linux/390 was posted to the VNC
mailing list in January of 2001, but never integrated. The Tridia version of VNC
integrated the patch the following month.
01/24/2002 - Neale Ferguson posted a link to yet another
story on Boscov's adoption of Linux/390.
01/25/2002 - Phil Payne posted a pointer to a story
on the Register website about IBM's plans to introduce their new processor series at
LinuxWorld in New York. Previously code-named "Raptor" the first system in the z800
series was going to be a specially priced Linux-only box with z/VM 4.2 and 3 years of
maintenance included, starting at $400,000. Dave Sandey found an article on CNET,
and Jim Elliott of IBM contributed the pointer to the official news release.
01/25/2002 - Neale Ferguson provided a pointer to a
list of "Handy one-liners for sed."
01/26/2002 - Mark Post published a pointer to a
relatively new article about the Sonera Entrum conversion to Linux/390.
01/28/2002 - Axel Wirbser of IBM reported the following updates to the DeveloperWorks web site:
01/28/2002 - Jon Doyle found a CNET article
that talks about Red Hat's new Advanced Server product, and the fact that
Red Hat will not make .iso images of it available for download. This seems
to be a new trend for Red Hat and it's higher-end offerings such as Linux390.
01/28/2002 - Neale Ferguson posted a pointer to
a lengthy article on Linux/390 titled "Linux on mainframes enters phase 2"
that covers quite a bit of the current state of the platform.
01/29/2002 - IBM finally issued a formal announcement
letter for their "zSeries Offering for Linux" on the new z800 platform.
Jim Elliott of IBM provided the pointer.
01/29/2002 - Sterling Commerce announced a Linux/390
version of their CONNECT:Direct product. Mark Post provided the pointer.
01/30/2002 - In response to some questions about setting up a HiperSockets VLAN under z/VM, Neale Ferguson posted this sample of a working definition.
hsi0 Link encap:Ethernet HWaddr 00:00:00:00:00:00 inet addr:10.20.71.5 Mask:255.255.255.0 inet6 addr: fe80::200:ff:fe00:0/10 Scope:Link UP RUNNING NOARP MULTICAST MTU:8192 Metric:1 RX packets:2 errors:0 dropped:0 overruns:0 frame:0 TX packets:5 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:100 RX bytes:168 (168.0 b) TX bytes:496 (496.0 b) Interrupt:5 Here's the routing: Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface 10.20.44.1 0.0.0.0 255.255.255.255 UH 40 0 0 ctc0 10.20.71.0 0.0.0.0 255.255.255.0 U 40 0 0 hsi0 0.0.0.0 10.20.44.1 0.0.0.0 UG 40 0 0 ctc0http://www.marist.edu/htbin/wlvtype?LINUX-VM.22971
01/30/2002 - Neale Ferguson posted a pointer
to a CNET article that reports IBM claiming to have nearly recouped its
$1 billion investment in Linux that it made in 2001.
01/31/2002 - Carlos Ordonez posted some commands he used to get an OSA card in QDIO mode running manually. Note the trailing blanks on the echo commands. They are necessary due to a bug in the current implementation of the interface.
echo 'noauto ' >/proc/chandev echo 'qeth0,0x0e30,0x0e31,0x0e32,0,0 '>/proc/chandev echo 'add_parms,0x10,0x0e30,0x0e32,portname:RPTRFET1 ' >/proc/chandev insmod qdio insmod qeth ifconfig eth0 10.0.0.1 netmask 255.255.255.0 broadcast 10.0.0.255 uphttp://www.marist.edu/htbin/wlvtype?LINUX-VM.22999
01/31/2002 - Dennis Wicks spotted an Enterprise
Systems Journal article about the new z800 systems that was loaded with inaccuracies.
About the only thing the article got right was mentioning z/VM as being important.