Latest Server related questions

Score: 0
How do I recover a broken logical volume group?
in flag

I created a logical volume group for my xen VMs on a separate drive. I had them working perfectly. Then I accidentally unplugged the USB cable hosting my vg0. Now my VMs drives cannot be detected.

I can see them.

root@bradNewInspiron15:/etc/xen# lvdisplay -v /dev/vg0/lv-vm-debian01 
File descriptor 58 (/run/user/1000/gnome-shell-disable-extensions (deleted)) leaked on lvdisplay invocation. Parent PID  ...
Score: 0
Slodog avatar
Apache sort order and preventing merging using the location directives in virtual server
ru flag

I have two locations, one of which is a subset of the other. I would like the match to be either/or. However, in the more specific path, it appears to match both and merge the potential weblogic destinations. The desired behavior is it it matches /alpha/beta to go to location X. If it doesn't match /alpha/beta, but still has the root of /alpha to go to location Y.

<VirtualHost *:10000>
  Serv ...
Score: 1
Rodion Grinberg avatar
HaProxy - Abillity to redirect subdomains and the base domain to the same backend
my flag

I need some help with the HaProxy setup.

Currently, I have the following config:

frontend fe_main_http
  bind :80
  reqadd X-Forwarded-Proto:\ http
  use_backend %[req.hdr(Host),lower]

frontend fe_main_https
    bind ssl crt /etc/haproxy/certs/ no-sslv3 no-tls-tickets
    reqadd X-Forwarded-Proto:\ https
    use_backend %[req.hdr(Host),lower]

    redirect scheme ...
Score: 1
zfs pool status unstable
us flag

I've been running zfs pool on ubuntu problem free for years. currently on 20.04

since around beginning of this year I've had to replace 2 out of 4 disks and even then brand new disks started showing errors.

started scrubbing it weekly and the things were kinda stable. 20-50 errors read and/or write errors would appear on some disks and scrub would fix them.

few days ago however a disk was faulted for ...

Score: 0
Samuel Ives avatar
What exactly does the AWS Pay For What You Use policy mean?
cn flag

Well, I was fed up with the absurd host prices here in Brazil when I got to know AWS and the pay-as-you-go policy.

I recently started a course for the solution architect certification (SAA2), that's when I saw in the EC2 module that machines must be turned on/off/rebooted manually which worried me because I thought the way it charged was: If there are users accessing the machine it will be runnin ...

Score: 0
Ari avatar
Unable to create cloud tasks in GCP
eg flag

Not really sure where to get support for this or even report it, as basic support requires a monthly subscription.

Trying to set up Cloud Tasks but the page displays the below error:

enter image description here

Trying to create a queue just leads to the next error:

enter image description here

I have tried creating a new project and the error persists. The error quite non-descriptive so no clue how to proceed. I'm owner and org admin, so I have god-mode  ...

Score: 3
Sergio D avatar
message of "enter at least one recipient" on roundcube, when i have my mail server ok
pt flag

I recently installed roundcube and tried to use it, I have a web server (were I have that roundcube) and a mail server, with thunderbird in my client machine, I can use all mail users I made witouth problems, I can send and receive emails if i use thunderbird, but no with roundcube

Even when i can log in roundcube with a user without problems, and even receive mails send for him, i cant send any ...

Score: 0
Diego Somar avatar
Passenger not running (Ruby on Rails + Nginx)
ru flag

My AWS instance was working fine with my app. But, today, the server was down without memory ram. Then I run:

sync; echo 1 > /proc/sys/vm/drop_caches
sudo service nginx start

After that, ram memory consumption is ok, but the app not. I'm running a Rails 4.2.1 website with Ruby 2.2.2 and nginx/1.8.0 in a Ubuntu 14 AWS instance.

When I access the site, I have the error:

502 Bad Gateway
Score: 0
xenrelay avatar
Routing inbound and outbound udp traffic to the same port in kubernetes
au flag

This is a follow-up to a prior question I asked, but with a different ask/approach. In case it matters, I'm on GKE, but I'm hoping there's a cloud-agnostic answer.

I'm trying to run the container factoriotools/factorio, but the application has some particular requirements due to the use of an application-specific public server listing function, as seen in many video games that use user-hosted servers. ...

Score: 0
How do routing rules from IPTables, IPVS, and NFTables get ordered from a precedent perspective, in the Linux kernel?
co flag

The Linux kernel has the ability to route traffic using nftables, iptables, and ipvs. Ive collected 3 related questions here, in order to generally ask the broader overall question of how precedence is determined with regard to kernel routing and firewalling rules:

  • In general, is there an order of precedence for when these load balancing / packet filtering constructs are ordered ?
  • NFT and iptables, ...
Score: 0
Stiofán avatar
Rsyslog only forwarding some log files to logstash
br flag

I have a client machine which forwards its log files to a central rsyslog server. I can see the logs on the central syslog server here:

root@server:/var/log# ls -al /var/log/client/
total 1952
drwxr-xr-x  2 syslog syslog    4096 Jun 19 07:06 .
drwxrwxr-x 14 root   syslog    4096 Jun 19 10:26 ..
-rw-r-----  1 syslog adm     324895 Jun 19 16:02 auth.log
-rw-r-----  1 syslog adm      31787 Jun 19 15:1 ...
Score: 0
siaimes avatar
How to correctly configure a host with two network interfaces so that the docker container can provide services normally?
us flag

My server has two network interfaces, so two IPs, one Internet IP, and one private address.

I added the following script to the /etc/iproute2/rt_tables:

252 enp0s3
251 enp0s8

And added the following script to the /etc/rc.local:

ip route add default via dev enp0s3 table enp0s3
ip rule add from table enp0s3

ip route add default via dev enp0s8 table enp0s8
Score: 0
bx1h3adend avatar
Nagios SNMPTT trap Logs issues
us flag

I had a quick question regarding the nagios snmptt trap logs. The traps arent coming through in the snmptt.log with proper date..its stuck on May 17th..

it has logs for all days till May 17.. It is still processing TODAY's snmptt trap logs as 17th may .

the time (16:33:39) keeps on changing , but date (Mon May 17) remains the same.


tail -f snmptt.log

Mon May 17 16:33:39 2021 . ...

Score: 0
DevOpsSauce avatar
Grafana false positive SNMP down
jp flag

NOTE: I also have Nagios running on another server that reports bandwidth warnings and up/down status. Not a single switch is alerting from this, only Grafana.

Grafana version 1.14.1

I was receiving alerts every minute of all switches reporting as down.


The metrics portion of the dashboard is:

up{instance="",job="snmp"} <--- same for all 12 switches that are polled

I was able to log  ...

Score: 0
anon avatar
Secondary DNS Server \ Domain controller
nz flag

I recently installed a secondary domain controller within my organization which also holds the DNS Role. If one DC goes down I would like all client machines to look for the secondary Domain controller. How can I remotely add the secondary DNS to all client machines without having to physically go to each client machine?

Score: 0
user3580480 avatar
Create a Windows Schedule Task via GPO to run as specified user
cn flag

I am trying to create a Scheduled Task via Group Policy (Computer Configuration\Preferences\Control Panel Settings\Scheduled Tasks), to run as a specified domain service account.

However, when Group Policy tries to create the task, it fails with the following error.

"Group Policy Object did not apply because it failed with error code '0x80070005 Access is denied."

Here is what the scheduled task looks  ...

Score: 0
Jorge avatar
SMTP postfix mail bounced host or domain name not found
cn flag

Hi i am new at this and i am trying to use telnet to send myself but i cant receive the mail because i get this problem i am using 2 machines with debian 10.9 one has dns and dhcp( and other has postfix ( here is my postfix conf i just want to send to myself an mail. I just want to send a mail to myself using telnet and be able to see it in /var/spool/mail thanks in advance for ...

Score: 0
Andy avatar
AWS Cloudfront is returning different responses for identical queries
cn flag

I have an API that is supposed to use accept a website header supplied by the client to respond differently depending on which website the request is for.

I have whitelisted this header in AWS Cloudfront. To my understanding this should mean that Cloudfront includes it in the cache key.

When I repeat identical curl calls to my endpoint I get different results back from Cloudfront.

The response head ...

Score: 0
Recommended way to ping from within container
dk flag

Recently I was configuring some containers with non typical networking settings (at least non typical for me) and so I was having some problems (finalny I was able to make it working so no worries). One thing that was making "debbuging" harder was that many public images doesn't contain "ping" util, and this is normal for building docker images (policy "less" is better).

In case when container ha ...

Score: 0
kaiya avatar
How to benchmark and analyze a network protocol prototype?
pf flag

We are currently working with an academic network protocol that modifies and partly encrypts IPv6 packets and establishes circuits to allow sourceless routing.

We got the prototype running, and it works with IPv6 messages if we put the message payload directly in to IP packet payload (e.g. send a hello world). We can, however, not use well-established tools as ping or iperf3, as the messages rece ...

Score: 0
S.Tacked avatar
Can not connect to a Google Cloud TPU using ssh (putty) in Windows
eg flag

I have a google v3-8 TPU, i can't figure out how to connect to it using ssh in windows. I did every guide there is, but the connection just times out.

What i tried (among others): 1. Dos command line: gcloud config set compute/zone europe-west4-a

gcloud config set account

gcloud config set project myprojectname

gcloud services enable

gcloud alpha compute tpus ...

Score: 1
Force all traffic through vpn
nl flag

Goal: force all traffic through VPN only.

Client: Windows in VM VPN: OPENVPN

I delete the route in the client. I make a route for the destination of my VPN server with my LAN default gateway as the gateway ( So, in practice when I turn on openvpn, it attempts to connect to the server IP which has a route through my local LAN gateway, which would result in a connection and a new  ...

Score: 0
An Tran avatar
Redirect url to the CDN storage
bt flag

I have structure folders on my nginx server: Image URL

I want it redirect to my CDN and get the picture on that CDN all time..

I try to use with this setting but it doesn't w ...

Score: 1
anon avatar
High availability VM Windows server
nz flag

How can I create a highly available VM running the Active directory role and DNS role. If one server goes down I would like it to fail over to the other node where clients within the domain will still be able to resolve their ip address

Score: 1
user10489 avatar
Need a simple High Availability file share
nc flag

I am looking for the simplest way to share a single file in a high availability way between a pair of linux servers. (Version and distribution are unimportant, I'm looking for a generic solution.)

I have two servers, each with their own local disks and NFS shares and other services between them. I have a file that both servers need to access, but nothing other than those servers needs to access ...

Score: 1
Ubuntu on dl380p gen8 won't boot from SD Card after few restarts and powering off
cn flag

I have two HP Proliant dl380p gen8 servers with full array (25 disks). I did install SD Card into the internal slot on motherboard. Changed USB setup in bios to Internal SD card first. After successful installation of Ubuntu Server 20.04 (through mounting virtual media in Remote console) and setup I did restart few times and everything was OK.

I turned off the power (plug out from the wall), chan ...

Score: 0
YouTube  2005 avatar
sendmail /etc/mail/access REJECT based off of keyword and TO: field
jp flag

someone placed my email to a weird list and i get 100s of messages each day.

I want to block the word "Unsubscribe" in all body emails address to  error:550 5.1.1 User unknown

Works perfectly but i want to receive other email so i want to create some sort of condition

if sent to
CONDITION Body contains "Unsubscribe" 
Then: error:550 5.1.1 User unkn ...
Score: 1
jLynx avatar
Update MySQL replication server position
gh flag

I have been trying to set up a replication of a large DB (90GB)

I have created a backup using mysqldump --single-transaction

I have then restored that on the replication server. I have then enabled replication, but I have accidentally clicked Reset slave in phpMyAdmin and its set the position back to basically 0.

So if my understanding is correct, it's trying to rebuild the DB on the replication  ...

Score: 1
Nginx with rtmp module and ffmpeg adaptive stream is not creating master dash manifest
in flag

I have a working setup of nginx with the rtmp module working like a charm creating live streams with both dash and hsl. No problem so far.

When I try to enable ffmpeg transcoding for adaptive streaming, it creates the hls version just fine, the video chunks, a m3pu8 for each video version and a master m3u8 that is the one I call from the web player.

But in the dash version I get the chunks, the mpd  ...

Score: 1
saltface avatar
How can I determine if Microsoft Patches are recommended or optional without using IUpdateSearcher?
id flag

On a single computer, it's simple enough to filter which updates Microsoft deems important by running a PS script such as the following:

$session = New-Object -ComObject Microsoft.Update.Session
$searcher = $session.CreateUpdateSearcher()
$result = $searcher.Search("IsInstalled=0 and Type='Software' and IsHidden=0")
$requiredupdates = $result.Updates |? AutoSelectOnWebSites -eq $true

However, this inf ...

The Stunning Power of Questions

Much of an executive’s workday is spent asking others for information—requesting status updates from a team leader, for example, or questioning a counterpart in a tense negotiation. Yet unlike professionals such as litigators, journalists, and doctors, who are taught how to ask questions as an essential part of their training, few executives think of questioning as a skill that can be honed—or consider how their own answers to questions could make conversations more productive.

That’s a missed opportunity. Questioning is a uniquely powerful tool for unlocking value in organizations: It spurs learning and the exchange of ideas, it fuels innovation and performance improvement, it builds rapport and trust among team members. And it can mitigate business risk by uncovering unforeseen pitfalls and hazards.

For some people, questioning comes easily. Their natural inquisitiveness, emotional intelligence, and ability to read people put the ideal question on the tip of their tongue. But most of us don’t ask enough questions, nor do we pose our inquiries in an optimal way.

The good news is that by asking questions, we naturally improve our emotional intelligence, which in turn makes us better questioners—a virtuous cycle. In this article, we draw on insights from behavioral science research to explore how the way we frame questions and choose to answer our counterparts can influence the outcome of conversations. We offer guidance for choosing the best type, tone, sequence, and framing of questions and for deciding what and how much information to share to reap the most benefit from our interactions, not just for ourselves but for our organizations.