Systems Administration

Nip/Tug: Plastic surgeon accused of mid-surgery 'hardcore' smut binge

The Register - Fri, 03/16/2018 - 20:52
Come for the nose job, stay for the... denials of any wrongdoing

A Los Angeles plastic surgeon has been accused of watching porn videos on a screen while performing surgery.…

Port applications to different operating systems from the command line with tonixxx

Command Line - Fri, 03/16/2018 - 20:44

Hiya! I'm plugging a wrapper I wrote around Vagrant to organize cross-platform builds, basically you configure your buildbots and tonixxx loops over each one, compiling and testing your project for each target platform. Let me know whacha think!

submitted by /u/mcandre
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Windows Clustering. 3 node, 2 site, witness where?

Sysadmin - Fri, 03/16/2018 - 20:37

I wanted to put this out to the masses to answer. I am looking for the best solution to this question. We have 2 sites. And a Windows cluster of which SQL AG rides on. In our primary site there are 2 nodes for HA, and 1 node in the 2nd site for DR. All servers are 2012R2. It was advised we put a file share witness in the 2nd site. Does this make sense or is it pointless? I've read putting the FSW in the primary site is optional in case the 2nd site is offline we can still reboot one of the nodes in the primary site without losing the cluster. We do not have the option of a 3rd site so please do not suggest. Thanks inn advance for any input or past experiences.

submitted by /u/jay2tall
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Oracle botherer Rimini Street brags of swelling fortunes – but hands tied on reinvesting cash

The Register - Fri, 03/16/2018 - 19:44
Biz left with fewer reps after limit on sales, marketing spend

Rimini Street, the third-party support thorn in Oracle's side, has reported increased revenue and operating profit in 2017 – but complained unspecified covenants have prevented it from investing in sales staff or marketing.…

Nested VM's in production

Sysadmin - Fri, 03/16/2018 - 19:10

Looking for some feedback on nested VMs in production. Has anyone done it? What are you using it for?

We are considering doing a nested VM in Azure so we can run two systems that have hyper-v images/deployments for them that we can't launch natively in Azure. These will be internal facing applications so there's no complicated networking involved getting this publicly facing in Azure.

submitted by /u/macboost84
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Lower notification volume when connected to BT

Tasker: Total Automation for Android - Fri, 03/16/2018 - 19:09

I've been trying to lower the volume of my notifications when I'm connected to my car radio. I have the "when connected to this BT device" part down but I can't seem to do anything to change the volume of my notifications. they always sound loader than my music/podcast and if by chance I get a notification while I'm not listening to something the volume is even loader/deafening.

I've tried every action in the Audio category and the only thing I can do is turn the notifications off with Sound Effects Off. I've noticed that the notification sound comes from both my car speakers and my phone, if I could only make it come from my phone that would be great too.

submitted by /u/cerebralcow
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Android Oreo mic drop fury: Google ups tempo for Pixel mobe audio fix

The Register - Fri, 03/16/2018 - 19:08
Hardware flaws may be amplified by slapdash software, tuning out bug now a priority

Google has escalated the priority and severity rating of a bug that has been silencing microphones on its Pixel smartphones running Android 8.1, aka Oreo.…

Salaried OT benefits or compensation

Sysadmin - Fri, 03/16/2018 - 19:07

Does your employer provide anything extra after you've worked all weekend/night or just an excessive amount of hours? Some give spot bonuses on big projects, or comp time, but I'm wondering how common it is. And what is too much for you until you look elsewhere?

submitted by /u/ale9
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This is a new one for me: Outlook autodiscover pointing to 365 account before I've even done anything!

Sysadmin - Fri, 03/16/2018 - 19:01

I created the new accounts on 365 to prep for migration, but I haven't changed MX records, or DNS, or anything; they are still using their on-premise 2010 Exchange server. Yet one user's Outlook 2016 is now INSISTING on pointing to 365! The test autoconfig utility shows it immediately finding Is this now hard-coded into Outlook 2016 or something?

submitted by /u/singbluesilver95
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Did I screw myself? Expanded VMDK, VM can't boot

Sysadmin - Fri, 03/16/2018 - 18:58

We have an ESXi 6.0 host with a server 2008 R2 VM acting as a backup server with 2x ~2.2TB VMDKs used to storage backups from the other VMs on the network. I expanded the VMDK by 500GB (from about 2.2TB to 2.7TB) and found that now the VM doesn't boot and I am greeted by an error "Device 'SATA controller 0' is not supported. This is a general limitation of the virtual machine's compatibility with the ESXi version of the selected host." We have scheduled backups that run every hour and I'm trying to run through all my options. I found quickly that I can't shrink the VMDK from within vCenter, though vCenter Converter would work. I installed vCenter Converter but found no options to shrink the shrink, and that this feature may no longer be supported? I am debating upgrading the VM version but I am not sure how risky that is. How screwed am I?

submitted by /u/ilovechips_
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Any harm in Server 2016 VMs on 2012 R2 hypervisor?

Sysadmin - Fri, 03/16/2018 - 18:55

Hello. I'm in the process of virtualizing all of our infrastructure and I had a question for those more experienced. My current hypervisor is a 2012 R2 server with the hyper v role installed. Are there any potential issues running 2016 VMs on this?

I have a few 2016 test VMs spun up, and the only problem I've noticed is a Microsoft-Windows-Hyper-V-Netvsc error in system log about not being able to negotiate protocol version 6.0 and 6.1, which I haven't been able to find much information on, but from the few posts out there on it it seems to be related to the VM os being newer than the hypervisor.

The other option I am considering is wiping and installing hyper v server 2016 as my hypervisor. I'm just trying to figure out if there is best practice in matching up hypervisor to guest OS level when it comes to Windows. Any advice is much appreciated!

submitted by /u/smitbro2
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Generate custom report from WebHelpDesk postgresql database

Sysadmin - Fri, 03/16/2018 - 18:55

I want to generate a report of tickets matching a certain request type. The simple reporting in WHD cannot achieve this. Basically, I want a simple report where the columns are

  • Ticket No.

  • Creator

  • Open Time

  • Closed Time

  • Custom Fields

I've been snooping around the database but not sure which table custom fields are in and how to get their text descriptions.

Also, would I require separate software to actually generate this report since WHD can't do it itself? What software would you recommend?

submitted by /u/slickrickjr
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Password protecting data in place on external HDD without the need for software to access it later on, compatible with both Linux & Windows... Any saviour?

Sysadmin - Fri, 03/16/2018 - 18:52

Pretty much everything is in the title. For a couple of days i've been seeking a way to simply password protect external hard drive WITHOUT format (it's large and full and I don't have a way to back it up). I also don't want solutions such as VeraCrypt, since you need the software installed to access the drive later on. And I don't want BitLocker, since I want it to be accessible on Linux aswell. I just want a simple pop-up window with a password login dialogue. And no, my external hdd didn't come with a software for that.

Any ideas?

submitted by /u/IMPOZZILA
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Do you think mastering induction is essential in becoming better at designing algorithms?

Computer Science: Theory and Application - Fri, 03/16/2018 - 18:48

I'm trying to improve my algorithm and problem solving skills and I found this book titled "Introduction to Algorithms: A Creative Approach" by Udi Manber. The book designs algorithms by induction. The problem is that I have found the book quite dry and the font looks very outdated so it makes the book more discouraging.

I'm wondering if I should stick it out and try to read the book or just settle for a book like Algorithm Design by Kleinberg and Tardos. Does anyone have any experience with Manber's book? Is it worth it?

submitted by /u/jasserhere
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Recommendations for colocation near Philadelphia

Sysadmin - Fri, 03/16/2018 - 18:20

Looking to colo a 1u Dell. Relatively low traffic. Can anyone recommend any data center near PA/NJ/DE that won’t break the bank?

submitted by /u/jayteeach
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Azure AD, LOB Apps and AAD Connect

Sysadmin - Fri, 03/16/2018 - 18:19

We're on the latest version of AAD Connect and actively syncing our on-prem directory users to AAD.

As we start integrating our LOB applications with Azure, I'm seeing a definite need to use SAMAccountName in Azure AD. For instance, our thousands of ServiceNow users had been created manually using their AD SAMAccountName. When we eventually move to Azure Auto-Provisioning, we're limited to using their UPN, which is very different from the user's SAMAccountName. Ex: ABC15021 / We could probably bulk-update their usernames in the application, however that would require someone with REST API programming skills, which we don't have access to. I foresee other LOB applications having the same problem in the future. Since our on-prem ADFS supports SAMAccountName for logon, we'd prefer to continue using that for seamless pass-through authentication.

The only viable solution I see is to sync up a user's SAMAccountName into an available extension attribute with AAD Connect.

Has anyone faced this or have guidance / best practice information? I would also appreciate if anyone has guidance or a tutorial on writing this new sync rule. The whole process is a bit intimidating considering my limited experience on the subject.

submitted by /u/wow6432
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Ubuntu 16.04.4 LTS 4.4.0-108+ hangs when sssd is enabled

Guest OS: Ubuntu 16.04.4 LTS (kernel versions 4.4.0-108 to current 116)

Virtualization env: VMWare ESXi 6.0

Host hardware: Dell R720

Using SSSD to bind linux servers to the AD domain for authentication. This was working fine right up to 4.4.0-104. After the update to -108,-109,-112, or -116, if sssd is enabled OR if it is disabled but then started after a successful boot and you perform a lookup (i.e. id some_domain_user), the entire system will freeze, and you have to force a reboot. There's even a blip in the syslog when it happens.

I increased loglevel to 9 in the sssd.conf file in all the sections, and then started SSSD and tried to lookup a user. The most meaningful things I've been able to pull out are:


(Fri Mar 16 13:06:03 2018) [sssd] [service_send_ping] (0x2000): Pinging (Fri Mar 16 13:06:03 2018) [sssd] [sbus_add_timeout] (0x2000): 0x88a9d0 (Fri Mar 16 13:06:03 2018) [sssd] [service_send_ping] (0x2000): Pinging nss (Fri Mar 16 13:06:03 2018) [sssd] [sbus_add_timeout] (0x2000): 0x8904c0 (Fri Mar 16 13:06:03 2018) [sssd] [service_send_ping] (0x2000): Pinging pam (Fri Mar 16 13:06:03 2018) [sssd] [sbus_add_timeout] (0x2000): 0x88ede0 (Fri Mar 16 13:06:03 2018) [sssd] [service_send_ping] (0x2000): Pinging ssh (Fri Mar 16 13:06:03 2018) [sssd] [sbus_add_timeout] (0x2000): 0x889710 (Fri Mar 16 13:06:03 2018) [sssd] [sbus_remove_timeout] (0x2000): 0x88a9d0 (Fri Mar 16 13:06:03 2018) [sssd] [sbus_dispatch] (0x4000): dbus conn: 0x888c10 (Fri Mar 16 13:06:03 2018) [sssd] [sbus_dispatch] (0x4000): Dispatching. (Fri Mar 16 13:06:03 2018) [sssd] [ping_check] (0x2000): Service replied to ping (Fri Mar 16 13:06:03 2018) [sssd] [sbus_remove_timeout] (0x2000): 0x88ede0 (Fri Mar 16 13:06:03 2018) [sssd] [sbus_dispatch] (0x4000): dbus conn: 0x890e00 (Fri Mar 16 13:06:03 2018) [sssd] [sbus_dispatch] (0x4000): Dispatching. (Fri Mar 16 13:06:03 2018) [sssd] [ping_check] (0x2000): Service pam replied to ping (Fri Mar 16 13:06:03 2018) [sssd] [sbus_remove_timeout] (0x2000): 0x889710 (Fri Mar 16 13:06:03 2018) [sssd] [sbus_dispatch] (0x4000): dbus conn: 0x88d5f0 (Fri Mar 16 13:06:03 2018) [sssd] [sbus_dispatch] (0x4000): Dispatching. (Fri Mar 16 13:06:03 2018) [sssd] [ping_check] (0x2000): Service ssh replied to ping (Fri Mar 16 13:06:03 2018) [sssd] [sbus_remove_timeout] (0x2000): 0x8904c0 (Fri Mar 16 13:06:03 2018) [sssd] [sbus_dispatch] (0x4000): dbus conn: 0x88eae0 (Fri Mar 16 13:06:03 2018) [sssd] [sbus_dispatch] (0x4000): Dispatching. (Fri Mar 16 13:06:03 2018) [sssd] [ping_check] (0x2000): Service nss replied to ping


(Fri Mar 16 13:05:06 2018) [sssd[nss]] [id_callback] (0x0010): The Monitor returned an error [org.freedesktop.DBus.Error.NoReply]

(Fri Mar 16 13:05:13 2018) [sssd[be[]]] [sbus_message_handler] (0x2000): Received SBUS method on path /org/freedesktop/sssd/service (Fri Mar 16 13:05:13 2018) [sssd[be[]]] [sbus_get_sender_id_send] (0x2000): Not a sysbus message, quit (Fri Mar 16 13:05:23 2018) [sssd[be[]]] [sbus_dispatch] (0x4000): dbus conn: 0xf1e840 (Fri Mar 16 13:05:23 2018) [sssd[be[]]] [sbus_dispatch] (0x4000): Dispatching.


(Fri Mar 16 13:06:53 2018) [sssd[ssh]] [sbus_dispatch] (0x4000): dbus conn: 0x1817880 (Fri Mar 16 13:06:53 2018) [sssd[ssh]] [sbus_dispatch] (0x4000): Dispatching. (Fri Mar 16 13:06:53 2018) [sssd[ssh]] [sbus_message_handler] (0x2000): Received SBUS method on path /org/freedesktop/sssd/service (Fri Mar 16 13:06:53 2018) [sssd[ssh]] [sbus_get_sender_id_send] (0x2000): Not a sysbus message, quit

Trying to capture boot time logs wasn't successful (with sssd enabled with systemd). Just a big gap in kernel.log and syslog. Watching the boot process shows that it hangs at:

Started D-Bus System Messaging Bus

Which appears to be corroborate the problems being indicated in the sssd logs. Some kinda problem with sssd sending dbus messages, right? If I revert to -104, all good. Anything above that version, sadness.

What is weird is that I do not have these problems on a test system using VirtualBox on my MacBook Pro running the same version of Ubuntu 16.04.4 LTS. I'm wondering if this might be a Meltdown related issue, as it happened with the kernel version that was initially released to address it (-108). We applied updates to our physical hosts, ESXi and the fixes for the guest OS. I haven't seen any notices or errata on the sssd mailing list, or anything related in recent Google searches. I'm afraid it is a weird confluence of host+vmware+guest OS problems.

So far, I've tried installing sssd-dbus (which is oddly not a dependency), and in conjunction with that setting sssd's system unit file to start sssd after dbus.service, and finally started it last (i.e. No dice.

Any insight or help appreciated! Thanks!

submitted by /u/Groinkie
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The end of Novell

Sysadmin - Fri, 03/16/2018 - 18:16

Today is the day. I just shutdown one of our OES eDirectory servers for the last time. The bulk of our services will cut over to Active Directory over the weekend. The rest will follow in the coming months, and by this fall we will no longer have services running on Novell, or MicroFocus, or whatever the hell they're called now. Feels like this

submitted by /u/billwrugbyling
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AS400 possibility of virtualization?

Sysadmin - Fri, 03/16/2018 - 18:06

Anyone know a way to virtualize an AS400?

submitted by /u/Mrpliskin0
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Datacentre storage requirements

Sysadmin - Fri, 03/16/2018 - 17:38

Considered posting this over in r/storage, but figure this question is as much about the procurement process as actually about the underlying storage, so others have likely been through the same process.

Basically, we currently have 2 x EMC VNX SANs in primary datacentre location. These provide block storage to a VMWare deployment over iSCSI. Total storage currently is around 80TB and 300VMs (mixed workload - DBs, VDI, fileservers etc), mostly spinning disk.

The maintenance on these comes up for renewal this summer, so I have been tasked with investigating the options and presenting costs back, either to renew maintenance, or replace storage.

I have a few gripes about our current solution, and no particular loyalty to the brand or the var we used at the time:

  1. The solution was spec'd incorrectly at the outset, we ended up with less space than required (partly our bad, partly theirs).
  2. We had a lot of performance issues on initial deployment, again suspect error on part of the VAR, had to redeploy completely before entering production.
  3. The VNXs feel very "closed box". It is hard to see what is going on in terms of performance. Most requests are met with the request to send SP Collects, which then take sometimes over a week to analyse.
  4. The costs to expand and add shelves per GB is extortionate.

In my ideal world, we would replace these SANs with something new which will tick all the boxes, but I need to try and make the figures work in order to justify this. In the ideal world, I guess what we are after is:

  1. Consolidate the two current VNXs into a single iSCSI block storage solution for our virtual environment.
  2. Would like new solution to have significant flash tier for a boost to performance over the current.
  3. Would like to start at around 100-120TB (expecting significant growth in next 6-12)
  4. Good support either from vendor or VAR
  5. Needs to be easy to analyse performance, reporting, bottlenecks etc
  6. Expansion costs need to be reasonable
  7. Ideal world, footprint in rack would be reduced (current solution takes up 1 full rack)

TL;DR, Really I have two questions for you:

  1. Recommendations on which vendors to talk to start scoping this and getting pricing etc. - is it best to approach vendors direct, a particular VAR to recommend, etc? (UK based).

  2. Ideas on the overall approach - how can I best quantify the comparison between replacing and renewing maintenance (to non-technical management).


submitted by /u/gingerjackuk
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