[RFC] zswap for Precise, with script

Any thoughts on this?  I wrote it on a whim after installing an SSD and 
completely disabling all swap.  Haven't checked to see if Ubuntu 
supports hibernate to file yet (creating a hibernation file on demand 
would be optimal for me...)

This works with kernel 3.2.0 ... 3.0 used num_devices as the parameter 
for zram, while 2.6.32 used num (I think).  They keep changing the 
parameter name!

This init script (sorry, I have no clue how to write an upstart job) 
will load zram, set one of its devices to a given size, create swap on 
it, and turn that swap on.  It'll also deactivate the swap and free the 
associated RAM.

Accepted sizes are "half" and "quarter" of installed RAM as gotten by 
MemTotal in /proc/meminfo; any size in bytes; or suffixed K, M, G sizes.

/etc/default/zswap can contain the following variables:

# Set to 1 to disable
ZSWAP_DISABLED=0

# Number of /dev/zramX devices
ZRAM_NUM_DEVICES=4

# Swap device is /dev/$ZSWAP_DEVICE
ZSWAP_DEVICE="zram0"

# Size
ZSWAP_SIZE="quarter"

Questions and patches related to casper.

I have been having issues trying to do a persistent-usb image for
Ubuntu 12.04.

*  /cow is not checked with fsck on startup.  (casper patch to fix this attached)

* /cow is not visible in / by default.  I think this is required if
   we are ever to be able to unmount /cow cleanly.
   (fixed by attached casper patch).

* /cow cannot be cleanly un-mounted on shutdown

   I've made some attempts, but have not gotten this working.
   The attached '/etc/init.d/umountroot' contains my attempts.

I'd love to get this working cleanly....so please let me know if you
have any suggestions.

I'm not sure if Ubuntu uses 'signed-off-by' for this type
of thing, but if so, consider it:

Signed-off-by:  Ben Greear <greearb <at> candelatech.com>

Thanks,
Ben

--

-- 
Ben Greear <greearb <at> candelatech.com>
Candela Technologies Inc  http://www.candelatech.com

12.04 - question/feedback on "sound settings"

Power off not really working on system with EFI BIOS

Problems with setuid app in Ubuntu 12.04

Hi all.  I've recently installed Ubuntu 12.04 64bit.

I'm using a proprietary VPN utility from Juniper Networks on my Linux
system.  In previous versions of Ubuntu, it worked just fine.  In the
current version of Ubuntu, I'm getting failures.  For some reason it's
not letting me invoke a setuid application.

The way it is deployed is it unpacks into a hidden directory under
$HOME, then the main VPN program needs to be made setuid root so that it
can be invoked by me but do root-y things.

Then, you can either run the tool directly from the command line or you
can run a little Java control window which manages the VPN.  If I run
the program directly from the command line, the setuid works and the VPN
comes up and works fine.  But, I can't control it or see how long it's
been up.

Whenever I try to use the Java control panel the GUI comes up and tries
to run the setuid program, but it fails and then the whole thing
crashes.  I get this error:

  Failed to setuid to root. Error 1: Operation not permitted

But I have clearly set the right bits and it works when invoked
directly.  I've tried many different variations of Java including
downloaded ones directly from Sun/Oracle.

One note, the application is 32bit and so I need to run 32bit Java as
well.  Not sure if that matters.

Has the 12.04 release installed some new security measures that might be
keeping my setuid program from working properly?  I've tried putting
Java under /opt/jvm and also run "service apparmor teardown" to try to
be sure apparmor is not involved, but I don't know enough to know if I
succeeded.

I'm really stuck and could use any pointers or tips anyone has.

questions about current ways of work in Ubuntu release process

Hi All,

 Some of you might remember me, some of you won't. I used to be part
of the Ubuntu community and loved every minute of it. I've been drawn
to some other open source projects since then, but the apparent
quality boost I'm experiencing with 12.04 has left me eager and
curious about things, not to mention Mark's helped to engage this
curiosity[0].

So, I'm terribly curious about:

1) "we’ll ratchet up the continuous integration" - What sort of
continues integration system Ubuntu is using now? I guess its based on
Jenkins ? I'd love to read the gory details somewhere.
2) "smoke testing" - is it done by hand by Ubuntu members, or also
taken care of by the CI system?
3) "automated benchmarking of the release" - How's that done? Again,
happy to read the gory details somewhere ;)
4) "..both qualitative and quantitative, with user research and
testing continuing to shape our design decisions.." - How is user
research being conducted? for testing, I suppose there's the community
QA team the has the test cases executed by hand? How is it shaping the
design decision? Are there new Launchpad modules that assist in that?
5) Is 'Fauna' another software / cloud component? (I've never seen
such a blog post with so many cryptic words for the non native English
speaker ;)
6) Where can I read more about 'Quantum' , the virtualized network
madness in the cloud  ;) ?

Kudos to the great team of Ubuntu - reading all of this and asking all
those question makes me wanna rejoin the party again, doing some catching up.
I might also try to pitch up some of the practices to the other open
source projects I'm part of ;)
(I've always admired the way we do things in Ubuntu!)

-- 
-Sivan

--

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Ubuntu-devel-discuss <at> lists.ubuntu.com
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Where is libgcr-3-common:i386?

I'm trying to run a program under Wine in my Ubuntu 12.04 64bit fresh
installation.  When I run it I get this error:

        p11-kit: couldn't load
        module: /usr/lib/i386-linux-gnu/pkcs11/gnome-keyring-pkcs11.so:
/usr/lib/i386-linux-gnu/pkcs11/gnome-keyring-pkcs11.so: cannot open shared object file: No such
file or directory

I've discovered that the 64bit version of that file lives in
gnome-keyring and so I tried to "sudo apt-get install
gnome-keyring:i386".  I found some libraries it requires and those
require other libraries, all of which do exist, until I get down to a
requirement for:

        $ sudo apt-get install libgcr-3-common:i386
        Package libgcr-3-common:i386 is not available, but is referred
        to by another package.
        This may mean that the package is missing, has been obsoleted,
        or
        is only available from another source

        E: Package 'libgcr-3-common:i386' has no installation candidate

However it's odd because if I go to the Ubuntu site to look it up, that
library seems to be packaged properly; for example:

        https://launchpad.net/ubuntu/precise/i386/libgcr-3-common

Can anyone explain what the message means and how I can get a copy of
that library to install?  Am I missing some extra repo (I think I've
turned them all on at this point)?

Major Page Fault Handler in the Linux Kernel

mysql-server ships with user *

After upgrading to Ubuntu 12.04 my install script broke, which turns
out to be related to the default * users in MysQL. When I installed
mysql-server on a brand new fresh Ubuntu 12.04 install, it had two
'wildcard' users, which wasn't the case on 11.10 / 5.0:

mysql> select host, user from mysql.user;
+---------------+------------------+
| host          | user             |
+---------------+------------------+
| 127.0.0.1     | root             |
| ::1           | root             |
| jeroen-ubuntu |                  |
| jeroen-ubuntu | root             |
| localhost     |                  |
| localhost     | debian-sys-maint |
| localhost     | root             |
+---------------+------------------+
7 rows in set (0.00 sec)

These wildcard users allow a client to login with an arbitrary
username. However, it will also match for any existing user. Hence a
problem occurs after additional users are inserted into the table:

INSERT INTO mysql.user
VALUES('%','myroot','','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','Y','','','','',0,0,0,0,'','');
FLUSH PRIVILEGES;

When logging in with user 'myroot', it is first matched to the
wildcard user and hence logged in as user ""@"localhost" instead of
"myroot"@"localhost". The problem can be avoided by deleting this
wildcard users from mysql.user.

I suspect that more people are running into this problem. What is the
intention of including this wildcard user? Is there any way I can
force mysql client to login with "myroot"@"localhost" instead of
""@"localhost"? I want my install script to work on general machines
but I don't want to just start removing pre-existing users...

Linux (or Ubuntu specific) tools to measure number of page faults

RHCS does not work on preceise!!! --- ccs_config_validate exits with 191

Hi all,

RHCS does not work on preceise!!!

> I have got a problem with "ccs_config_validate".
> I says: "Unable to update relaxng schema: /usr/sbin/ccs_config_validate: line 191:
ccs_update_schema: command not found."
> This bug is described in
"https://bugs.launchpad.net/ubuntu/+source/redhat-cluster/+bug/956383" but no solution found yet.
ccs_config_validate still does not work.

I have this problem since one month! And no solution yet!!!

Who is responsible? Who has built the "cman-package"?

Please could anyone help me?!?!

Best regards
Christian