Greatest Hits

15
votes
1answer
27k views

vSphere - Why upgrade VM Hardware Version?

At the beginning of the year we performed an upgrade of our vSphere environment from vSphere 5.0 to vSphere 5.1 U1 Build 1063329 compromised of about a dozen ESXi hosts and a vCenter instance hosted ...
5
votes
3answers
23k views

USB drive not detected in Intel EFI shell

I must update an Intel S3420GPLC board. BIOS, BMC, FRU / SDR, the whole thing. Everything is pretty much automated in the Intel download. You're supposed to boot to the integrated EFI shell, mount ...
4
votes
2answers
25k views

DNS on Windows Server 2012 R2

I'm new to Servers and am using Windows Server 2012 R2, after trying to create a AD DC and connect a machine to it, I get the following errors when connecting: "An Active Directory Domain ...
11
votes
2answers
42k views

Enabling mod_headers on apache2

I'm trying to enable the module "headers" into my apache2 installation on ubuntu 10.04 system, here's some info: Server version: Apache/2.2.14 (Ubuntu) when I run the command: a2enmod headers I ...
4
votes
3answers
16k views

SQL Server Windows Authentication fails after tonight's security updates: The login is from an untrusted domain

We have the following setup: One Domain Controller (DC, Server 2003 R2 Standard x64) One SQL Server (SQL, Server 2008 R2 Standard x64) some clients. All machines are in the same domain. All user ...
4
votes
3answers
24k views

nagios nrpe unable to read output

I'm trying to use check_nrpe to check on a remote server, but it's not working and I can't figure out what am I missing... # /usr/lib/nagios/plugins/check_nrpe -H XXX -c check_load -a 6,5,4 8,7,6 ...
10
votes
4answers
23k views

iptables nat does not exist

Today my iptables nat on the host system stopped working and I have no clue what happend! (That's very bad, I know) All commands are executed as root user. If I run $ iptables -t nat -L I get the ...
6
votes
3answers
27k views

vSphere - copy virtual machine to external usb hard drive

We have an ESXi server standing somewhere else. I can connect to the server with the vSphere client. There is an external USB hard drive plugged into the server. How can I copy a stopped VM to the ...
6
votes
3answers
36k views

openssl client authentication error: tlsv1 alert unknown ca: … SSL alert number 48

I've generated a certificate using openssl and place it on the client's machine, but when I try to connect to my server using that certificate, I error mentioned in the subject line back from my ...
17
votes
7answers
64k views

How do you re-mount an ext3 fs readwrite after it gets mounted readonly from a disk error?

Its a relatively common problem when something goes wrong in a SAN for ext3 to detect the disk write errors and remount the filesystem read-only. Thats all well and good, only when the SAN is fixed ...
6
votes
4answers
36k views

Hyper-V Time Sync for VM Domain Controller

We have 2 physical hyper-V servers running 8 VMs between them, each physical server has a Domain controller on it running in a VM and all servers are 2008R2 The VM PDC is set to NTP and to sync with ...
16
votes
7answers
79k views

How do I change the Software Update server address on a client Mac (to use my own server)?

Now that I have started the Software Update service on my Leopard Server, how do I change my client Macs to check for updates on it?
7
votes
6answers
23k views

CleanMgr can nolonger be installed on server 2012 R2

Just tried to get cleanmgr installed and working on a fresh 2012 R2 install. Copies CleanMgr.exe & CleanMgr.exe.mui across like done before but when it is run get error: The Program or feature ...
10
votes
1answer
32k views

Server 2012: change desktop background color

On a Windows Server 2012 Remote Desktop Session Host with the Desktop Experience feature enabled and the desktop wallpaper disabled, users wish to configure own color schemes and define an own desktop ...
3
votes
1answer
32k views

what is acceptable datastore latency on VMware ESXi host?

Looking at our performance figures on our existing VMware ESXi 4.1 host at the Datastore/Real-time performance data Write Latency Avg 14 ms Max 41 ms Read Latency Avg 4.5 ms Max 12 ms People ...
11
votes
2answers
35k views

Generate an OpenVPN profile for client user to import

Is there any documentation or resource describing how to generate and host a profile for an OpenVPN client to import? Ideally would like my users to not have to separately fetch a .zip file of the ...
19
7
votes
3answers
41k views

How to update/flush dns cache on clients?

When I have made changes on the DNS host. How do I get the clients (servers) to update/flush their DNS cache, so they see the change right away?
8
votes
2answers
33k views

how to uninstall mariadb and re-install mysql ? Mysql install turns into mariadb install

I recently upgraded my centos system via the desktop. mistake! I had mariadb, phpmyadmin working just fine before - but after the upgrade they stopped. I frantically googled and tried to follow some ...
3
votes
4answers
20k views

haproxy logging to syslog

I installed haproxy 1.5 via apt-get on ubuntu 14.04 via ppa:vbernat/haproxy-1.5 as per http://haproxy.debian.net/ The problem is it logging to /var/log/syslog instead of /var/log/haproxy.log The ...
14
votes
2answers
29k views

How to view connected users to open vpn server?

I'm developing a web site for managing open vpn users with django framework. But I need to now is there any way to extract active users from open vpn? My server is running Ubuntu 12.04.
5
votes
4answers
42k views

Windows Update not working on Windows Server 2008 R2

The Windows Update screen comes up and I click on Download Updates. I then get the bar scrolling across the screen and it says Downloading Updates but the counts never increase (0 KB total, 0% ...
5
votes
3answers
39k views

How to investigate unexpected Linux server shut down?

In a new Xeon 55XX server with 4xSSD at raid 10 with Debian 6, I have experienced 2 random shut downs within two weeks after the server being built. Looking at bandwidth logs before shut down does not ...
5
votes
7answers
63k views

Sun Solaris - Find out number of processors and cores

Our SPARC server is running Sun Solaris 10; I would like to find out the actual number of processors and the number of cores for each processor. The output of psrinfo and prtdiag is ambiguous: ...
16
votes
3answers
22k views

Managing Windows Powershell from Linux terminal

I manage Windows Server 2012 servers. I'm learning PowerShell to manage these servers through command line. My workstation runs Ubuntu and I usually manage Linux servers by connecting via SSH. Is ...
1
vote
3answers
31k views

How to to avoid “Port 22: Connection refused” error on SSH port (22)?

I have a server where I just use openssh, openvpn and rabbitmq (which requires a lot of erlang dependencies). Every time I reboot my server I can't access to it anymore getting Port 22: ...
11
votes
2answers
25k views

Using CA certificate for Remote Desktop Connection

I’m connecting over the web to a remote Windows Server 2012 R2 via Remote Desktop Connection for administration needs. It is a single web and database server without an AD etc. I’m not talking ...
14
votes
5answers
47k views

How can I manually run a nagios check from the command line?

When defining and testing new services in nagios I have been restarting nagios, then clicking the service, and rescheduling a check for as soon as possible, then waiting until the check happens. Is ...
4
votes
2answers
14k views

How to mount an USB drive under VMWare ESXi 5.5?

I want to mount an USB drive to VMWare ESXi 5.5 host. The USB drive is visible with lsusb : Bus 01 Device 03: ID 154b:0095 PNY But not under /vmfs. Under /dev/disks/ I see many entries, but dunno ...
3
votes
3answers
28k views

How To Properly Setup DNS Forwarders On Windows Server

I was wondering how to properly setup DNS forwarders on Windows Server 2008 R2. I have three Domain Controllers. Each of the DC's have have following: AD Role DNS Role DHCP Role Static IP Address ...
5
votes
3answers
50k views

Setting Java Runtime setting for all users on a client PC

We have a problem with a java application running out of memory. Our (Windows XP) client PCs have JRE 1.6 version 18 installed. I want to increase the -Xmx runtime parameter for the JRE to 512M but I ...
12
votes
5answers
22k views

SSH aborts with Too many authentication failures

I'm attempting to run this simple provisioning script but I'm encountering errors when running vagrant up and then vagrant provision commands. I read that I needed to create a /etc/ansible/hosts file ...
10
votes
2answers
29k views

What “access rights” could be blocking access to a gitlab repository?

I'm trying to setup gitlab (6.5.1) on a fresh clean server. Everything appears to work, but git is unable to push to any project. Following the commands from the newly created project page and pushing ...
10
votes
1answer
16k views

Failed to connect to 127.0.0.1 port 80

I have running nginx server (doesn't matter which server): $ sudo netstat -tulpn | grep 80 tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 4268/nginx tcp6 0 0 :::80 ...
24
votes
3answers
64k views

How do I enable apache modules from the command line in RedHat?

How do I enable apache modules from the command line in RedHat? On Debian/Ubuntu systems I use a2enmod to enable modules from the command line. Is there an equivalent for RedHat/CentOS type systems? ...
4
votes
5answers
42k views

How to verify if Windows Update location is properly configured from WSUS?

I was recently configuring a WSUS server. However I am not sure if I've set up correctly (WSUS isn't an everyday tool at the place where I work). I've been wondering, Is there a command (or a tool) ...
0
votes
1answer
12k views

Job for httpd.service failed

after following this tutorial :https://www.digitalocean.com/community/tutorials/how-to-create-an-ssl-certificate-on-apache-for-centos-7 I have tried everything I possibly can to fix the error I have ...
10
votes
5answers
29k views

How can I schedule a server restart from command line on Windows 2012?

I would like to schedule a one-time server restart, e.g. to finish installing updates early in the morning. How can I do this from the command line on Windows 2012? On Windows 2008, I would have used ...
35
votes
5answers
4k views

Is logging in as a shared user a bad habit?

I've worked in organizations where instead of creating a new Ubuntu user per person that wants to log into a machine, the sysadmins simply add the ssh key of each user to .ssh/authorized_keys, and ...
4
votes
2answers
21k views

How to make Samba share to NOT ASK FOR PASSWORD

NOTE: I have read probably up to 50 different pages describing how to setup public Samba share in the span of 2 YEARS and nothing ever worked for me. I don't know how much RTFM I need to set this ...
7
votes
3answers
41k views

can high load cause server hang and error “blocked for more than 120 seconds”?

Currently running a few VM's and 'baremetal' servers. Java is running on high - over 400%+ at times. Randomly the server hangs with the error in the console "java - blocked for more than 120 seconds" ...
7
votes
5answers
70k views

How to set ulimits in Solaris 10

I normally use pam_limits.so and /etc/security/limits.conf to set ulimits on file size, CPU time, etc. for the regular users logging in to my server running Ubuntu. What is the best way of doing ...
4
votes
1answer
29k views

Changing the default gateway, multiple NICs

I have Ubuntu 13.10 (kernel 3.11.0-19-generic). On startup, the network configurations are as follows: dor@ubuntu:~$ sudo ifconfig -a em1 Link encap:Ethernet HWaddr 44:37:e6:4c:ca:0a ...
10
votes
5answers
50k views

How can I verify that an RTMP stream URL is working?

I have been put in charge of setting up a CDN account for streaming video but am not actually running the site that will host the content. How can I test that a published RTMP URL is working? Do I ...
8
votes
3answers
25k views

svchost.exe -k netsvcs occupying >1GB memory

I have noticed my production server "svchost.exe -k netsvcs" is occupying >1GB ram memory, steadily, which I think is a bit excessive. This is what tasklist /svc will give me for this process: ...
7
votes
2answers
15k views

Which is better image format, raw or qcow2, to use as a baseimage for other VMs?

I am using a baseimage and based on that creating many VMs. And now I want to know which is better, qcow2 or raw to use for a baseimage. Moreover, can you please tell me if there is any advantage of ...
3
votes
3answers
24k views

PowerShell - Limit the search to only one OU

Ive got this cmdlet and I'd like to limit the results to only one OU: Get-ADUser -Filter {(Enabled -eq $false)} | ? { ($_.distinguishedname -notlike '*Disabled Users*') } Now Ive tried to use ...
15
votes
1answer
16k views

The right way to keep docker container started when it used for periodic tasks

I have docker container with installed and configured software. There is no any programm supposed to be started/runned all the time. What I want - its ability to start some command depending on ...
9
14
votes
3answers
15k views

How do I make a connection private on Windows Server 2012 R2

After a restart of one of our servers (a Windows Server 2012 R2), all private connections become public and vice versa (this user had the same problem). Stuff like pinging and iSCSI stopped working, ...
4
votes
2answers
26k views

Can't establish PPTP VPN windows 8/8.1

I am having an issue where I keep getting either error 800 or 807 whist trying to connect to a VPN server via PPTP on Windows 8 and 8.1 pro. The server itself is Synology's VPN Server running on a ...
2
votes
4answers
24k views

SCCM - How to make new deployed applications appear in Software Center faster?

I am trying to make the process between SCCM deployments and the Software Center (configmgr) faster, if not seamless. Right now, applications generally take about 1-2 hours to populate properly. ...
6