Oleg Goldshmidt | 29 Oct 13:47 2014

[JOB opportunities] DevOps Engineer, Software Engineer, Product Manager


Hi,

My employer, TrapX Data Security Ltd., has several openings for experienced Linux people (the last one - Product Manager - is not as Linux-oriented but is attached for serendipity).

Feel free to send me your CV (off list, of course) if you are interested.
 
1. DevOps
​ ​Engineer:

Experience Level: Senior

Employee Type:
​ ​
full
​ ​
time

Location: Tel Aviv, Israel

An
​i​
nnovative
s​​
tartup company is looking for Looking for a experienced
​ ​
DevOps engineer for building and 
​d​
​eploying​
security products in a
​ ​
complex and challenging environment. Working with development,
​ ​
integration
​ QA,​
and product management
​ teams​
.

Applicable Skills

​* ​
Bachelor
​'​
s degree in Computer Science or related field
​* ​
solid
​L​
inux systems administration experience
​* ​
​e​
xcellent scripting abilities in
​b​
ash and
​p​
ython
​ (and the rest of the GNU/Linux toolchain)​

​* ​
5+ years
​of experience ​
automating operations and engineering tasks with scripting
​ ​
languages (
​p​
ython a must)
​* o​
perational excellence through tool development, monitoring, logging,
​ ​
reporting, controls and automation
​* ​
​e​
xperience
​with public and private ​
cloud infrastructure
​(e.g., ​
AWS,
​ ​
Google, VMWare
​)​

​* ​
​s​trong technical foundation in virtualization technologies
* e​
xperience running mission-critical Linux servers in virtualized
​ ​
environments
​* s​
olid understanding of TCP/IP networking concepts and major protocols.
​* ​
​s​
olid understanding of tiered security concepts (network, OS,
​ ​applications).
​* ability to build, monitor, and tune production servers and services
​* advanced software configuration management experience (especially with ​
​g​
it
​)
* experience with continuous integration / continuous deployment
* experience with Linux packaging systems (deb and/or rpm), including building and maintaining packages​

​* a​
bility to work individually and in small teams
​* software development experience - an advantage​


2. Software Engineer :

An Innovative Startup company is looking for top notch developers

Experience Level: Senior

Employee Type:
​ ​
full-time

Location: Tel Aviv, Israel

Applicable Skills :

​* ​
​B​
achelor
​'​
s degree in Computer Science or related field
​* ​
​k​
nowledge and Experience in Linux
​p​
rogramming
​e​
nvironment
​and toolchain ​
-
​a m​
ust
​* d​
eep
​k​
nowledge 
​of​
​C / ​
C++ /
​​Python / ​
Shell programming - 
​a​
​m​
ust
​* k​
nowledge in
​s​
ecurity architecture
​* s​
olid understanding of TCP/IP networking concepts and major protocols.
​* ​
​experience with​
 My
​SQL​
/
​MariaDB/​
S
​QL​
ite
​* k​
nowledge and
​e​
xperience in Web services
​and protocols ​
(XML,
​ ​
SOAP,
​ ​
JSON,
​ ​
REST API)
​* k​
nowledge in TCP/IP and
​n​
etworking
​ in general​

​* experience developing Linux kernel modules - advantage

3. Sr
​.​
Product Manager -
​ ​
Enterprise / Security Products

We are looking for a S
​enior​
Product Manager
​for Enterprise ​
Security Products
​​
​​
.

Applicable Skills:

​* ability to multitask​

​* ​
​ability to e​
xercise independent judgment in developing methods, techniques, and
​ ​
evaluation criteri
​a​
for obtaining results
​* ​
6 or more years of experience in product management roles
​* ​
4 or more years of experience with the high technology industry with
​ ​
software security technology knowledge a plus
​* c​
ustomer service orientation
​* s​
ales engineering and / or development experience a plus
​* e​
xcellent verbal and written communication skills
​* s​
trong organizational and self-motivation skills
​* s​
olid business sense combined with ability to think strategically and
​ ​
execute tactically
​* s​
ome marketing, business development, and / or selling experience a
​ ​
plus
​* p​
roven ability to develop quality products on time
​* s​
trong documentation skills
​* t​
ravelling > 40%


--
Oleg Goldshmidt | pub-kS3dXprRuVK+yyHGYkWdLQ@public.gmane.org
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Oleg Goldshmidt | 29 Oct 13:06 2014

preventing dhclient from running under certain conditions


Hi,

Suppose we have a Debian Wheezy machine with a bunch of network
​ ​
interfaces, some of them VLANs. Some of the interfaces are
​ ​
DHCP-based. For various reasons there is a requirement that
​ ​
DHCPDISCOVER should not be sent out when certain conditions are not
​ ​
fulfilled[*]. The conditions are always known locally, we can assume
​ ​
that there is a program, call it chk4dhcp, that returns 0 or 1, and
​ ​
the DHCP interfaces should only be started when the status is
​ ​
0. Static interfaces should always be configured and started.

This mechanism should work on boot, on restarting network, on "ifup
​ ​
<iface>", "ifconfig <iface> up", etc.

Question: how does one intervene in the DHCP client
​ ​
operation? I found out that /etc/dhcp-enter-hooks.d/* is irrelevant
​​
(if a hook fails the failure is ignored). So is /sbin/dhclient-script
​ ​
(I thought I'd create a "chk4dhcp && dhclient-script" script and
specify it as "script" in dhclient.conf - does not help). I also
​ ​
failed to write "up" or "pre-up" stanzas in /etc/network/interfaces
​ ​
that would prevent DHCPDISCOVER from being sent.

For reasons that should be obvious I am very reluctant to rename
​ ​
/sbin/dhclient binary and place something else in its stead.

The existing configuration
​seems to be Debian default) ​
does *not* have dhcpcd, and I am also
​ ​
reluctant to change
​ (and re-test)​
the whole framework, even if dhcpcd proves more
​ ​
malleable.

Any ideas?

[*]
​Without​
 
​discussing the actual requirements, consider ​
a trivial
​example. Suppose you have several DHCP VLANs configured on eth1, and suppose that for various operational reasons the eth1 link may occasionally be down. What happens in such a case is that dhclient keeps trying, for all VLANs and for a long time, before giving up. You don't want this to keep a machine from booting, to keep other interfaces from starting, etc. One would want to detect this early (e.g., using ethtool or similar) and not even attempt to bring up DHCP interfaces. [In my mind, this is a bug in dhclient, but this is beside the point...]

--
Oleg Goldshmidt | pub-kS3dXprRuVKHDFFEDHFeIg@public.gmane.orgg

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Eli Billauer | 25 Oct 17:54 2014
Picon

[HAIFUX LECTURE] Bitcoin -- Daniel Brunstein

On Monday, October 27th at 18:30, Haifux will gather to hear a talk by 
Daniel Brunstein:

    Bitcoin - What and Why

Abstract

General Agenda

    * What is Bitcoin
    * Wallets (mobile, cloud, cold storage)
    * Price and Market Capacitance
    * Worldwide adoption by big corporations and merchants
    * Regulatory environment
    * Billion Dollar Markets being disrupted by Bitcoin
    * Alternative crypto-currencies and Bitcoin 2.0
    * VC investment in Bitcoin startups
    * Bitcoin in Israel
    * Bitcoin in the Academy

Technical Agenda

    * Public/private keys
    * Mining
    * Blockchain
    * Security, 51% attack

=================================================================

We meet in Taub building, room 6. For instructions see:
http://www.haifux.org/where.html

Attendance is free, and you are all invited!

==================================================================
Future lectures:

There are no scheduled lectures.

==================================================================

We are always interested in hearing your talks and ideas. If you wish to 
give a talk, hold a discussion, or just plan some event haifux might be 
interested in, please contact us atwebmaster@...

--

-- 
Web:http://www.billauer.co.il

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Shlomi Fish | 24 Oct 18:07 2014
Picon

Ubuntu 14.10 Was Released

-- Shlomi Fish

--
------------------------------------------
Shlomi Fish http://www.shlomifish.org/

Chuck Norris helps the gods that help themselves.

Please reply to list if it's a mailing list post - http://shlom.in/reply .
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Eli Billauer | 23 Oct 09:10 2014
Picon

Haifux is back! (Bitcoin on Monday)

Hi all,

Haifux is resuming its activity, now that the holidays are over.

Our next meeting, on this Monday, is about Bitcoin.

See http://www.haifux.org/lectures/330/ 
<http://www.haifux.org/lectures/330/>

This is also a call for speakers -- the rain has fallen on Haifa, but 
our lecture pipe is quite dry. Suggestions to talks are welcome.

Regards,
    Eli

--

-- 
Web: http://www.billauer.co.il

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Shachar Shemesh | 20 Oct 09:23 2014

Should I switch my home to IPv6?

I am shopping around for a new ISP. Exaphone are offering a reasonable deal, with an option to connect using IPv6.

Sadly, their fixed IP costs are astronomical even with IPv6, without any justification I can see.

The question is: should I? Do standard linksys routers support IPv6? Will I be able to get any level of
bittorrent bandwidth with my IP unreachable to other peers running IPv4?

What do you say?

Shachar
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Shachar Shemesh | 10 Oct 14:38 2014

How do I debug this (mailman)?

I'm trying to set up mailman on a new host (transferring my VPS to a new machine). This is running Debian. Mailman is set up, shows up in the web interface. I transferred the mailing list. I'm trying to send myself a password reminder, and.... nothing.

The postfix logs don't show anything at all.
/var/lib/mailman/qfils/virgin shows something that looks like the password reminder
Nothing appears in my inbox.

All tips on the internet say to look for the mailer's logs to find out what's wrong, but the mailer doesn't show any logs at all.

Ideas?

Shachar
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E.S. Rosenberg | 9 Oct 21:06 2014
Picon
Picon

OT: looking for someone going back and forth to Finland from Israel

Maybe someone on the list works for Nokia or something? Or someone is going to SLUSH? I have a phone that only gets fixed there...

מועדים לשמחה,
Eliyahu - אליהו
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David Harel | 5 Oct 20:14 2014
Picon

Boot sequence on Ubuntu 14.04

Greetings,

I hastily tried to upgrade from 10.04 to 14.04 using do-relase-upgrade
It turned out to be a bad idea.
Now after boot I get something like "can not mount /" and then it suggests that I will type (among other things) M for maintenance (start a shell)
First flaw I noticed is missing init functions typically in /lib/lsb/init_functions.d
I also noticed that init_functions file is not up to date so I copied them from a stable14.04 installation. This operation enabled running them scripts in /etc/init.d and also the service command.
Also I had to create a directory /run/network so ifup -a will start.
Still I couldn't figure out what step in the boot process I am missing that fails to mount /
Currently I setup the services on this server manually including:
mount -rw,remount /
mountall
networking
ifup -a // Had to do it separately.
smbd
nmbd
ssh
postgresql-8.4
apache2

the server is running in full but I guess it has some security issues.
I can not use the init command (i.e. init 2) to initiate the machine. It reboots and I have to start all over again.

I intend to install a new server instead but for curiosity sake I want to keep the bad server in order to learn more about upstart.

I did not find any articles about boot sequence with upstart other than how to build rc files and a few about the conf files in /etc/init

Will appreciate some good reading on the subject.

Thanks.

David Harel
Amuka
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Erez D | 27 Sep 15:24 2014
Picon

shell shock

just read about the "new linux bug" in ynet
found out it is a bash exploit

just fyi,

see http://www.engadget.com/2014/09/25/what-is-the-shellshock/

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Steve Litt | 25 Sep 04:46 2014

Daemontools intro

Hi all,

I wrote this introduction to daemontools:

http://www.troubleshooters.com/linux/djbdns/daemontools_intro.htm

Enjoy!

SteveT

Steve Litt                *  http://www.troubleshooters.com/
Troubleshooting Training  *  Human Performance

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