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

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Centos. infiniband multicast join failed for status -22

I have a cluster with Linux Centos 6.5 as OS. All the machines are connected by infiniband, the network is working fine but in the /var/log/messages of all the machines I can see the following message ...
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1answer
13 views

Checking for disk failures and issues in a VM

If you host with a provider who runs a RAID 10 or another RAID based system and your in a VM. Are you able to check for disk failures or RAID failures from within the VM or does it require host based ...
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1answer
10 views

Can we increase RAM, CPU as per our requirements in AWS EC2?

Can we increase RAM, CPU as per our requirements in AWS EC2? Like customize increasing memory which is possible in vmware
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1answer
13 views

linux : allow other user to use installed application

In Linux Ubuntu 15.04, I have created 3 users. I have then installed an application, capifony, as one of them, svassaux. Now, I want to let another user, user2, run the capifony app and he gets : ...
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0answers
9 views

Apache Server Variables on VirtualHost

I've a question, I want to setup my Apache server to be able to serve my subdomains dynamically, to do so, I want to use only two "sites" config files (000-default.conf and default-ssl.conf). On the ...
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0answers
8 views

exim4 domains/users configuration on files or on db?

I am setting up a web server using Exim 4 on Debian 8 and, as usual, I was going to use MySQL as backend to store the settings related to the domains and users (like quota, emails, aliases, forwards, ...
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1answer
121 views

linux + at command + how to kill the job

I use the at command in order to run the task (test script ) every one min at -f /tmp/test now +1 minute commands will be executed using /bin/tcsh job 1438153690.a at Wed Jul 29 10:08:10 2015 ...
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1answer
13 views

cpufrequency scaling with debian 8.1 and Intel XEON E5-1650 v3

I want my server with debian 8.1 not to use cpu scaling but always run at the highest possible frequency. I have installed cpufrequtils $ dpkg -l | grep cpufreq ii cpufrequtils ...
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2answers
30 views

top command + how to verify iowait value for one hour

my target is to check iowait value that not higher than 50 from top command and if value is higher than 50 for more then one hour , then need to give alarm about this ( by script or other option ) ...
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0answers
7 views

nginx http substitute module

I'm trying to figure out where ./configure is. The setup guide says run the below: Installation To install, get the source with subversion: git clone ...
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0answers
7 views

Install libcanberra-gtk3.x86_64 package in RHEL6 running gnome2

I am running RHEL6 on my workstation. I keep getting this error when I open gvim: Gtk-Message: Failed to load module "pk-gtk-module": libpk-gtk-module.so: cannot open shared object file: No such file ...
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0answers
11 views

Bind, IPV6, and Out of Zone Data

I am running into some problems getting bind properly configured to support IPV6 hosts. IPv4 is working fine, no issues. My zone file has both IP4 and IP6 data intermingled which I believe should ...
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2answers
502 views

Troubleshooting a Redis Stall

We have several redis instances running on a server. There are also multiple web tier servers connecting to those instance that experience a stall at the same time. We had packet captures going at ...
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0answers
19 views

I have Accidentally remove a non-system kloxo folder [on hold]

I have accidentally removed a non-system folder which is not a system folder but contained important data for me. I had set two domains on it. how can I recover those files/folders? Any help is really ...
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1answer
15 views

Is it possible to specify an answer file when PXE booting windows using memdisk?

I'm able to PXE boot windows from my Linux server using memdisk to mount a winpe.iso that: mounts two samba share drives, one for the windows install disk, and another that has answer files (each ...
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0answers
12 views

SELinux - Create custom Context [on hold]

I need to create custom selinux rules for some applications that are not already have selinux context, So How can i create custom SE-Linux types, users and roles in SE-Linux.
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0answers
19 views

Force Linux to reload passwords [on hold]

I have a small cluster of Linux computers. To make administering them easier, they share via NFS the /home directory of the master computer, as well as the files that describe the usernames and ...
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1answer
16 views

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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0answers
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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0answers
22 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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0answers
21 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
13 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
19 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 ...
4
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1answer
38 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
83 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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0answers
7 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 ...
0
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1answer
30 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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0answers
16 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
26 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
13 views

RHEL6 undo virtual client rhel6 [on hold]

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
14 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
19 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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0answers
16 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
11 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
13 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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0answers
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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0answers
19 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. ...
-1
votes
1answer
26 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 ...
-1
votes
1answer
37 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
33 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 ...
0
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1answer
35 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 ...
0
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0answers
13 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 ...
0
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1answer
16 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 ...