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Q&A for system and network administrators

Nginx server_name issue on HTTPS for multiple applications(vhosts)

I have two application on server which where were working perfectly until I planned to switch them to HTTPS. Nginx config for app 1: server_name abc.com my.abc.com static.abc.com Confing for app 2:...

Error: Your request can't be completed right now. Please try again later. exchange server 2013

previously i steuped a exchange server 2013 on a 2013 R2 few hours it worked well but now it shows Error: Your request can't be completed right now. Please try again later. when accessing mail ...

Fedora 25 Workstation: Opened firewalld, can't ssh in

I installed Fedora 25 (Workstation) on one of my computers recently. This is my first experience with a RH-style distro -- I've previously only used Debian-based systems, and on those systems I used ...

Slow speeds on Raid 10?

I'm getting slower than what I would have expected on an external raid box (https://www.scan.co.uk/products/4-bay-icy-box-ib-rd3640su3-external-raid-system-for-35-sata-hdd-with-usb-30-plus-esata-host) ...

Redundant Power Supply Sloshing (If sloshing is the right word)

I have a Supermicro Redundant Power Supply with two units in it. I also have two UPS units, one for each of the Power Supplys. I was watching the LCD on the UPSs for the watt usage. The total watts ...

Hyper-V: Not able to ping my local VM from Host

I have an external wireless switch which I'm using to connect to my VM. I'm able to access internet on my local VM. The problem is that I'm not able to ping it. I've done the following after reading ...

How to query Foreman for hosts with a specific Global Parameter?

We make some use of the Global Parameters in Foreman, and I need to list all hosts, which have the Global Parameter foo set to "bar". Can I do that with the REST API or via some other method? Going ...

What is the difference between fiber optic transceiver and optical module?

Sometimes fiber optic transceiver is called optical module, sometimes not, so what is the difference between them?

Cannot do “lvcreate” : "not found: device not cleared” on Centos

I have created volume group, but when I tried to lvcreate, it failed: [root@c7v232 ~]# vgdisplay --- Volume group --- VG Name vg_1afe5376c50bb27bdc8a0342a0bfb50b System ID ...

Apache 2.4 list prefork directive values from command line

I am unable to find values of MPM Prefork directives like MaxRequestWorkers/MaxSpareThreads etc in my config file. Is there a way to list these values from command line? -bash-4.2# httpd -v Server ...

How to map a domain name to a load balancer in google cloud platform?

I have successfully set up a load balancer in google cloud platform If I use the IP as shown in the image, I can test and verify that the set up is working as I planned. Now I would like to map a ...

websocketserver behind nginx and apache

How is it possible to establish a websocket connection through nginx and apache, where both act as reverse proxies. The system is setup with apache on the main host and a tornado webapplication in a ...

I expanded disk size of compute engine, will it charge me more?

I expanded disk size from 10GB to 15GB of compute engine, will it charge me more? even if my total storage is below 10GB?

exim4 - email clients unable to retrieve emails

I have configured exim4 on my Debian system and i am able to send emails from the server as a user and receive emails to this user. I am also able to connect mail client such as thunderbird/bluemail ...

Which Ports need to be accessible on a Domain Controller for Clients to logon? continued

With reference to one of the questions asked "Which Ports need to be accessible on a Domain Controller for Clients to logon?" I have a aligned issue being faced. Please see the following ports which ...

Reducing Apache Memory usage and Average Process Size Value

I know that question is little long but i choosed to describe each and every aspect which i observed from my end. I am using a Linux server, OS used is Ubuntu 14.04, all rest configurations are ...

Do I have to specify new added domain in /etc/host?

I purchased a new domain, then set correctly the DNS records (A ...). The domain points to my server, then Apache VirtualHost intercepts the HTTP queries. The question, is simple : do I have to add ...

Local DNS lookup always fails first time

On a very small number of Windows 10 machines at my work we have an issue where lookup of local domain names always fail to be resolved, but only for the first request. The following is the output ...

What is Puppet's equivalent of input validation using stdlib in Ansible?

Problem The following issue appears in the ansible-sensu-client: {"timestamp":"2017-01-19T09:49:14.803754+0000","level":"fatal","message": "check name cannot contain spaces or special characters","...

“You have been logged in with a temporary profile” - Windows 7 PC on Windows Server 2012

I know it is one of the most frequently asked question. But I've tried all the fixes which didn't help. We have Windows 2012 Server R2 as DC and a series of Windows 7 systems connected to it. Suddenly,...

MacOS Sierra iMac Apache, FTP, MySQL Not Responding

I'm upgrading server hardware for a client to a new iMac running MacOS 10.12. We run MySQL, Apache and FTP services on their local network. The problem I am having is that these services become ...

opendkim - how to take action on incoming messages that should be signed?

How can I configure opendkim to quarantine or reject (incoming) unsigned messages that instead should be signed because a key is present in the DNS? opendkim.conf(5): On-NoSignature (string) ...

How to delete s3 buckets which are in different regions in aws using cli

I need a script to delete multiple buckets (which are at different regions) at same time using AWS CLI.

Ports required for single sign-on to domain web server

I have a IIS on a server which is a member of an AD domain. The app is using Windows Integrated Authentication and users want single sign-on. Besides the web app's port (80) are there additional ...

Does Vagrant share still work?

I'm trying to share my local Vagrant virtual machine as I've done before (couple of months ago tho) using: vagrant share --http 80 --name myname I have already logged in with my Atlas account using ...

Terraform says vm 'test' not found while trying to create a virtual machine in VMware

Terraform says vm 'test' not found while trying to create a virtual machine in VMware This is my configuration: provider "vsphere" { allow_unverified_ssl = true } # Create a virtual machine ...

How do i redirect on my Server 2012 R2 incoming domain requests?

I have two virtual machines on my server which use port 80. How do i redirect sub1.home.home to machine 1 and sub2.home.home to machine 2 I think my router is not capatable for that, so port 80 ...

Monitoring Page-out rate in Unix

I want to understand how important it is to monitor Page-out rate while monitoring memory on a Unix server? Does a high page-out rate clubbed with high physical memory usage, indicate that the memory ...

Log shipping between SQL 2012 and 2016 instances

My question is about SQL Server log shipping from instance having SQL 2012 and SQL 2016. Is it possible to implement? The error I am getting is, SQL server doesnt allow database/log to be restored in ...

How do i configure Multi WAN Windows VPN Server?

So normally when clients connect to a VPN of ip address = 1.1.1.1 , they get the public IP - 1.1.1.1. But in my case , there will be a lot of traffic so using the same NIC would be pointless. Let ...

How to update OpenSSL only in Xampp [on hold]

I have installed xampp 5.6.28 / PHP 5.6.28. I cannot upgrade to latest xampp version. But I want to upgrade OpenSSL version 1.0.2h to OpenSSL Version 1.1.0. How to upgrade openSSL separately in xampp ...

Blocking a process to access certain urls

I would like to configure the firewall to block certain domains for a particular process. But these blocked domains should be available for use by other processes. How can I achieve this ?

Amazon RDS: Why is Security Groups listed twice?

Via the AWS Management Console: I created an Elastic Beanstalk app configured with RDS. When I look at my Amazon RDS PostgreSQL DB instance details, I see Security Groups listed twice, with two ...

Jenkins Stopped working (Windows)

[Jenkins Error1 Jenkins Stopped working when tried restarting, `actually my Email editor plugin was not sending emails after build is generated so i tried restarting the Jenkins, it came back with an ...

dnsmasq not caching for non-public dns servers

I tried to configure my dnsmasq to forward requests to different dns servers depending on the domain. server=/a.example.org/192.168.a.a server=/b.example.org/b.b.b.b server=/c.example.org/8.8....

Allow a user to read some other users' home directories - Windows

I have an user - reception with a home directory ("\nas\home") which I want to share it with another user only i.e.: john I'm looking for a way around of it as we the way SMB home shares are treated ...

How to make a domain I am renting appear in namecheap as a yearly price [on hold]

I have some sites I rent out on epik.com and I have seen the price for sites on namecheap such as work.design and it says 130.00/year, how do I make my site show this, when I questioned namecheap live ...

Is it safe to mysqldump a section of missing data for re-importation with my flags?

Let's say on a test database about a year's data got erased. I got the two id's for the data in one year at the earliest and the data in the other at the latest and therefore a range of what's missing ...

Apache reverse proxy with IIS SNI returning 404

I use an Apache reverse proxy to a number of IIS sites. When using IIS 8.5 with SNI I'm getting 404s back when I take an app pool and site offline. Traditionally there would be no response and the ...

Output in pattern only three lines, line by line

i have a log, where i need to take operations with three lines: Friday, 10 October 2012 13:15:39 +0300|192.168.110.5|rock| - |user has made auth in| - Friday, 10 October 2012 13:15:39 +0300|192.168....

GRE tunnel TTL number

Here is the setting on server A: iface serverA_gre0 inet tunnel address 172.24.0.85 mode gre endpoint x.x.x.x dstaddr 172.24.0.86 netmask 255.255.255.252 ...

Confused about meaning of SE and EX releases in cisco IOS

I have been looking into this for a while now, but I can't find an explanation anywhere (the closest I could find was in wikipedia and cisco ) The switch is a 2960s that I need to stack to a 2960x (so ...

cant connect to aws linux instance via vnc after creating image

I created an image of an instance of my client which is a linux system with oracle and vnc installed. which is an r3.2xlarge instance I created it using this window and I am now not able to connect ...

Systemd PHP start script Centos 7

I have a PHP script I'm trying to create a service for. I've created the service however I can't get it to start. The weird thing is, the exact same service UNIT works on my other server of the same ...

If I restart xinetd service , does it impact the currently active FTP connections?

In my Linux system FTP server is running from xinetd . I want to make a configuration change inside the /etc/xinetd.d/ directory for the FTP server launch , with respect to the arguments passed to the ...

EC2 Linux: check which processes are consuming all the memory

I have an m4.4xlarge EC2 Linux machine on AWS with 16 cores and 64 Gb RAM. I am running some small tasks but I see that 57 Gb appear as used. However, the command top doesn't show processes consuming ...

How to disable connection-specific dns suffix? [on hold]

Because of my high ping network, I tried to find something to fix it by the following website. http://www.tomshardware.com/answers/id-2822945/slow-internet-high-ping-day.html ipconfig /release ...

TFS 2015 Unable to deploy to to specific server, but Visual Studio can from the Build Agent server

I'm at a bit of a loss here, having checked all the usual suspects. One of the most baffling things is that I can deploy via Visual Studio on the Build Agent server, using the same url to the same ...

Setup server without router (direct to modem)

I don't know if this was asked here already, but I can't seem to find any related or similar question. I have a friend who told me he want to setup a simple FTP, and HTTP server for experimentation ...

System reboots when I use smartctl with Adaptec RAID controller

We have a system normally running Windows 2008 (original release). It sometimes experiences strange STOP talking about memory paging issue. Evaluating this case we tested memory (~10 memtest passes), ...
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