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

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Creating a custom .iso with kickstart CentOS 6.6 [on hold]

I downloaded the CentOS 6.6 minimal .iso file. I mounted it. Copied the necessary files to a new_work_dir. I added few extra custom packages to new_work_dir/Packages and ran createrepo -dpo .. . and ...
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1answer
11 views

Recover sql database files without using sql server

My Ubuntu computer HD crashed, so I cant boot up anymore, I'm trying to recover my data from the hard drive by booting up using the live CD. I can access the crashed internal hard drive by mounting ...
1
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1answer
19 views

How to get local ip address associated with default gateway

There may be several network interfaces on a server, e.g., lo, eth0, eth1 From the route table, I know that eth0 is connected to the default gateway. The address of the default gateway, for example, ...
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1answer
24 views

Bash add entry to fstab by script

I'm newbies in bash scripting and i try to write script that add entry for cifs windows share to fstab. I writed a litle script but i'm not shure if it will work fine. I haven't linux to test it Can ...
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0answers
21 views

Is it possible to run 2 concurrent tcpdump with different options?

I need to run 2 concurrent tcpdump commands with different arguments/options. Why ? Because we wrote some long long scripts compatible with following options : tcpdump -ixenbr0 -s 400 -n -A 'port sip ...
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0answers
8 views

Retrieving the AD machine account password on an Ubuntu machine

I'm trying to perform an LDAP query against Active Directory from a script (very similar to this question) from a domain-joined Ubuntu machine. The script can't prompt for a password, as it won't be ...
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2answers
22 views

how to ssh from a vm to another vm that is on a different host

I have 2 CentOS computer in the same local area network. Both computers have their own virtual machines running CentOS. I would like to ssh from the virtual machine of 1 host to the virtual machine of ...
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0answers
4 views

Can I create a virtualbox server that manages all lan traffic and only when running? [migrated]

I'm running a Windows 7 host and a Linux Mint guest vm in Virtualbox using a bridged adapter. I have multiple web sites set up in the guest os. Currently, I can only access the page at var/www/html ...
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0answers
17 views

Varnish GeoIP (vmod_geoip) + Amazon Linux

I'm trying to install vmod_geoip via amazon linux, but so far no luck. I've installed geoip geoip-devel. I've downloaded the vmod_geoip source. I'm able to ./autogen.sh but ./configure constantly ...
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1answer
16 views

date and hwclock not in sync - why

I am in GMT+8 Singapore [root@SJOAM ~]# hwclock -r Thu 30 Jul 2015 02:10:14 AM SGT -0.469446 seconds [root@SJOAM ~]# date Thu Jul 30 10:11:28 SGT 2015 [root@SJOAM ~]# cat /etc/sysconfig/clock # ...
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1answer
9 views

Upgrading XenServer 6.2 to 6.5 or updating in general

Trying to get my XenServer to update, and want to upgrade it also to version 6.5. But cant figur out how. When i try to update using the XenCenter, i cant select the server itselfe when i get to that ...
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0answers
10 views

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 ...
1
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1answer
16 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
12 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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0answers
15 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
11 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
9 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, ...
2
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1answer
126 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 ...
0
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2answers
34 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
11 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
14 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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0answers
20 views

Capture all mysql requests/responses and caculate the response time using tcpdump

I need to capture all mysql requests/responses using tcpdump and after that need to find out which response related to which request in order to caculate the response time of each request. I used the ...
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2answers
537 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
18 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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votes
1answer
17 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. ...
0
votes
1answer
10 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
23 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: ...
0
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1answer
14 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
votes
1answer
41 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 ...
2
votes
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
8 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 ...
1
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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 ...
0
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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 ...
0
votes
1answer
15 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) ...
1
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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
17 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 ...
0
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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 ...