Linux is the generic term for a UNIX-like open source operating system based on the Linux kernel.

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How to configure a zone transfer from a windows 2008 primary dns server to a CentOS secondary dns server

So my primary dns server is a windows machine and I would like to configure a zone transfer to a secondary dns server that runs CentOS. Both indivdual dns servers were tested and work on their own. ...
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5 views

PXELinux with WDS/DNS/DHCP

I've been reading up on setting up a PXELinux machine to run side by side with WDS on Windows and all the guides talk about setting up a DNS and DHCP server on the same server as the PXELinux. What ...
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13 views

XenServer, 32-Bit VM's cant exceed 64GB RAM in total

XenServer 6.5 SP1 - 128 GB RAM on Host Several 32-Bit Linux VM's are deployed, most of them are provisioned with 4 GB or 8 GB of RAM. Once the summarized RAM usage of those 32-Bit VM's reaches 64 GB, ...
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18 views

Boss-friendly OpenVPN server with Active Directory? [on hold]

Has anyone found a license-free OpenVPN server with AD integration that "Just works"? We need a VPN for our admin team, but don't want to spend days learning and setting up RADIUS by hand. I've seen ...
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0answers
7 views

Aggregate syscall time on OSX / strace -c equivalent [on hold]

I have been using strace -c on my linux box a lot. It gives me an overall idea, on which system call the program spending too much time, (reading/writing/network connection) Eg: ...
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1answer
10 views

Nginx “rewrite or internal redirection cycle while internally redirecting to ”/index.html"

So here is my problem: I have the same problem with every file I try to access. It always sends me back to index.html or shows me an 500 server error. The error log gives me: "rewrite or internal ...
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0answers
15 views

Can DNS fail because of a client server configuration?

I recently began work in a new environment. The network has many subnets and many nodes with many network engineers who work in the environment. There is a Linux server with Cobbler on it. It has a ...
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1answer
28 views

SSH connection refused/error message

I have a systems which has multiple users but only few selected users are allowed to login to the system at a given time through SSH (or otherwise). I am using "passwd -l/-u" command to lock and ...
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3answers
79 views

word wrap in ssh session not working with grep

When I ssh to my Linux servers and use grep like this: grep 'timeout exceeded' logfile | less word wrap does not work. However, if I use the same command but use less first, like this: less ...
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6 views

Syslog-ng and Stunnel between two hosts (Connection refused)

I'd like to setup syslog-ng over stunnel between a host on my LAN and a host in my DMZ but can't quite figure out the configuration. The stunnel config seems to be correct. If I shutdown syslog on ...
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1answer
28 views

IPtables on Linux for mysql server private interface

Looking to make a mysql database server for web-servers. The server has a public & private interface and I need some assistance writing the rules. I want to only allow SSH, mysql via private ...
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11 views

Clonezilla from MBR to GPT partition

So i have a clonezilla image of a centos6.5 box. It is 32GB in size. I have restored this to many system, but they have all been small enough to still use MBR. So when restoring i just used the -k2 ...
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2answers
24 views

logrotate not workig as expected

I am setting up logrotate & realized that a few of the options are either incorrectly explained/understood. My logrotate rotate 52 keyword is creating 52 files of the same log every time it ...
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votes
1answer
12 views

RHEL6 undo virtual client rhel6

I am running rhel6 on my laptop. I was playing with the Open Client Go Virtual and accidently installed a KVM image of RHEL6. It runs the full virtual machine. I want to unregister, delete and reclaim ...
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1answer
12 views

Can't merge an LVM snapshot into it's origin

I recently had a problem with an LVM volume because it's ran out of CoW space. I added more space to the volume and restarted it, now it shows CoW is only 66% full. It seems LVM created a snapshot ...
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0answers
17 views

Fast & Traceable copy of 2 TB data over Gigabit LAN from Ubuntu live mounted Volume to Synology NAS (Win SMB, NFS, Mac AFP)? How?

Fast & Traceable copy of 2 TB data over Gigabit LAN from Ubuntu live mounted Volume to Synology NAS (Win SMB, NFS, Mac AFP)? How? I am going a Data Recovery using a Unbunto Live CD (14.x LTE) ...
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0answers
15 views

R packages - Should I mount /usr/share/R/library

We have a small cluster of linux machines (~15) with up to 20 users. Over the last few years we have written a few basic R scripts for doing basic statistical analysis. The problem I have had as a ...
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14 views

Nginx with Python and Wordpress same server

I have a aplication with Python/Django running in www.mydomain.com. I want to create a blog with WordPress in the same server and I want my domain looks like this: www.mydomain.com/blog In nginx how ...
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2answers
27 views

ZFS never mounts my pool automatically, why?

I'm running ZFS on Linux on my workstation, and have been for about two years: [ 273.779699] SPL: Loaded module v0.6.4.2-1~vivid [ 273.824212] ZFS: Loaded module v0.6.4.2-1~vivid, ZFS pool version ...
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1answer
10 views

Linux mail(x) command. Can't open or use. Just spits out old message and returns to prompt

(Debian Squeeze) I was working on a shell script that piped output to the mail command. I must have done something wrong, as I am no longer able to use the command for anything. Even if I type "mail" ...
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1answer
18 views

What might be using my smtp port on a new CentOS machine?

I'm trying to setup a simple email server using node smtp-server. I'm the only one that's ever accessed the machine (a CentOS 6.5 box on Digital Ocean), and I've only set up 2 http servers. I'm ...
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2answers
11 views

unison or Rsync for session files

In my cheap config I am using 2x app servers and 1x DB server. My question now is what I should use in order to sync session files between the servers for my php app? Is unison or Rsync good here, ...
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10 views

Low disk space on a centos server [duplicate]

I have a Problem on a centos server and i am unable to drag files via ftp the server has a hard disk with 2 terabytes and i checked all files on how much disk space is consuming and it is 2.9gb and ...
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14 views

Can't access from outside process running in a Docker container

I'm trying to run a gameserver inside a docker container on my server but I'm having troubles connecting to it. I created my container and started my gameserver (which is using port 7777) inside it. ...
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1answer
25 views

Slow down traffic to one specific website [on hold]

My computer (running linux) is connected to a WiFi Network and the connection is shared to an AccessPoint over the LAN Port. What I would like to do is lower the priority to a specific website (for ...
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1answer
34 views

Manage Multiple Ubuntu servers

I was wondering if it is possible to manage multiple ubuntu servers without using landscape, the only thing it should do is be able to run scripts through and update the system remotely.
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1answer
29 views

Linux virtual server, direct routing (LVS/DR) on VPN

Is it possible to set up Linux Virtual Server on VPN? The real servers should lie on the same LAN segment. I want the real server to be a non-LAN server connected to the Internet. Could it be ...
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1answer
34 views

How do i know if this logs are normal, and if somenone got into my server?

last month i was logging into my server as usual and was a mess: programs not working, /home not mounting anymore etc etc Now i've downloaded all the Ubuntu server logs and i've noticed that auth is ...
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1answer
25 views

“cannot open shared object file: Input/output error” - for everything

pacman: error while loading shared libraries: libarchive.so.13: cannot open shared object file: Input/output error Almost every command responds with something like this, each with a different shared ...
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0answers
22 views

Best Software solution for defend block DDoS? [duplicate]

What are the best solution for defending DDoS on software niveau? I have installed this: mod_evasive fail2ban Maybe this: syn_cookies What can be done else what can i install as software?
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2answers
36 views

ssh user@localhost vs user@servername

I am working with 2 servers (Redhat enterprise 7). When i ssh both of them. One is showing user@localhost where the other is showing user@servername. I would expect to have both like user@servername ...
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12 views

AWS + KeepAliveD: Not able to Ping or Telnet Virtual IP from remote hosts

I am setting up KeepaliveD with 2 nodes on AWS by following this article. My Virtual IP gets moved from one node to another in case of fail-over. However, the VIP just cannot be accessed from a remote ...
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1answer
15 views

RHEL6 installed wrong version of rpmforge

I installed the wrong version of rpmforge for el7. Then I ran an update which installed this package on my system python-crypto-2.6.1-1.el7.rf.x86_64 Notice the el7 but I am on rhel6. I then ...
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1answer
8 views

Which log file can I use for server port analytics?

Ideally I'd like to use piwik to track conversions from ads to server connections on port 5000 and port 5001 but I highly doubt that is even possible. I'm willing to settle for [ipaddress,time ...
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2answers
27 views

How can I redirect logfile output to a network socket?

I am using a commercial Java app which writes it's logfiles using log4j. I'd like to get those logfile entries into Syslog where we have specific filters setup to trigger on system events. Log4j ...
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0answers
29 views

Embedded Linux – mechanism for deploying firmware updates?

I am considering developing on the Yocto project for an embedded Linux project (an industrial application) and I have a few questions for those with experience with embedded Linux in general -- Yocto ...
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1answer
30 views

Apache randomly stops at night with no errors in logs

I have a server on AWS that has been stable for years. It's running Apache 2.2.22 on Ubuntu 12.04.5 LTS. I regularly run security updates at the top of the month. Recently Apache has stopped ...
1
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1answer
21 views

Open Source Network Monitoring Primarily for Linux Cloud Environment [on hold]

How are you currently monitoring your Linux network in the cloud? We run several (read 7) CentOS instances that host several websites as-well-as a couple of MySQL instances. I am trying to find an ...
0
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1answer
22 views

Delete files with logrotate

Is it possible JUST to delete the log files in a directory by using logrotate w/o actually rotating them? We have an app that generates logs in the following format: app.log.DD_MM_YYYY. I am ...
-1
votes
1answer
37 views

Hostname is not mapped to the ip address correctly [on hold]

I recently installed Wordpress on my home server running Arch Linux. Everything else works smoothly except that when try to access the server externally, the style sheet is not rendered. I have read ...
2
votes
1answer
52 views

Domain A record on active directory controller

Currently we have an Active Directory setup for a small network running on Debian 8 and Samba 4. At one point we had to change the ip address of the AD server from 100.0.0.4 to 100.0.0.100. I edited: ...
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0answers
16 views

Can't access host-only network when on two interfaces [migrated]

I'm trying to use a host-only connection with my VirtualBox VM. My VM is set up and can ping the host (192.168.56.1) on vboxnet0. If I disconnect the host from my local network (internet access) I ...
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1answer
27 views

iptables, redirect all port 80 to an IP but let one IP forwards through

My router redirects all incoming traffic (interface eth0) to IP 1.2.3.4 : iptables -t NAT -A PREROUTING -i eth0 -p tcp --dport 80 --to-destination 1.2.3.4:80 When a client hits "100.80.77.8", I'd ...
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0answers
24 views

bash scripting and comparing 2 directories - Beginner [duplicate]

My problem is that i have to check what files are included in the $directory, then i have to make a new file with name specified by me and compare if the name doesn't already exist in this directory ( ...
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0answers
41 views

bash scripting comparing 2 things [on hold]

My problem is that i have to check what files are included in the $directory, then i have to make a new file with name specified by me and compare if the name doesn't already exist in this directory ( ...
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votes
1answer
14 views

Chown results in not being able log in VestaCP [duplicate]

so I needed to chown a folder and I accidently wrote chown -R admin:admin / And that chmowned all files for ~5sec then came up an error that it can not chown something and I stopped. After I ...
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0answers
8 views

ip command vs qdisc discrepancy in dropped packets

I am simulating packet loss via mininet network on Ubuntu 14.04. Why are there no dropped packets showing up in ip command? For switch s3, I have Qdisc (sudo tc -s qdisc show): qdisc htb 5: dev ...
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0answers
15 views

Nginx only allow directory endings, no index.html or index.php

Working on setting up an nginx server. I want to add some sort of location block that would only allow the parent folder of index.html or index.php to be served, but would redirect index.html or ...
0
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1answer
26 views

XFS: Internal error XFS_WANT_CORRUPTED_GOTO

After what appears to be a power outage on my standby postgres database, i'm receiving the error: XFS: Internal error XFS_WANT_CORRUPTED_GOTO after the system reboots as well as postgres error log ...
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1answer
40 views

PXE boot windows PE from Linux

I'm attempting to get a Windows Preinstallation Environment to boot over PXE from a Linux server. The end goal will be to install Windows but that's pretty easy once I can get WinPE to start up (I've ...