CentOS is a Linux distribution standing for "Community ENTerprise Operating System" and is a rebuild of "Red Hat Enterprise Linux" (RHEL). The "CentOS6" tag refers to versions 6.x of CentOS.

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How to uninstall git installed from the source? [closed]

I installed the git using this article. Now I want to uninstall the git. How to do it?
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How do you configure /etc/pam.d/system-auth-ac on CentOS 6 using authconfig?

I'm trying to replace the cracklib module with passwdqc. Every time I do an authconfig --update (or --updateall), the changes I make on the system-auth-ac file goes away. The authconfig command line ...
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ESXi 4.1 CentOS 6.X eth0 unnavailable

I don't usually ask for help so directly, usually google have all i need but this time i'm seriously lost. Hope you can help me .s The thing is, i have a server with Vmware ESXi 4.1 and 5 already ...
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1answer
713 views

Configuring openLDAP in CentOS 6.3

I have followed the instructions found in this question until the part that I have to do an ldapadd using "cn=Manager,dc=syco,dc=net" as DN. However, I am getting the error Invalid Credentials (49) ...
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1answer
364 views

BIND DNS strange behaviour resolving dns

CentOS 6.3 BIND version 9.8.2 Server is acting as my local network's DNS server. What happens is that I can resolve jquery.com fine, but accessing code.jquery.com results in nothing found when ...
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2answers
590 views

Linux servers going into Halt when pressing Control-D in putty or exit in the shell

Since today at noon, there's a number of Linux CentOS servers which are going to Halt whenever i type exit or use Control-D to close the putty window. Did anyone encounter this weird behavior before? ...
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1answer
1k views

automount a windows share

I have this line and it works mount -t cifs -o myuser //192.168.0.12/Public/Docs /mnt/cifs_shares/Docs But then I try with autofs and it doesn't In /etc/auto.master: /mnt/cifs_shares/Docs ...
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1answer
985 views

CentOS release 6.3 (Final) php-mcrypt Install Fails [closed]

I got a clean installation of CentOS 6.3, with php 5.3.18. I tried installing the epel-release-6-7.noarch.rpm and epel-release-6-7.noarch.rpm in order to run # yum install php-mcrypt However it ...
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Trying to install SawMill and getting the following error:

[root@sawmill sawmill]# ./sawmill ./sawmill: error while loading shared libraries: libldap-2.3.so.0: cannot open shared object file: No such file or directory Using yum provides libldap_r-2.3.so.0 i ...
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1answer
1k views

Which mirror should I use to download Kernel Xen 6.3? [closed]

I'm following this construction to install (version 4.1.2) on a CentOS 6.2 (x86_64) system. When I use this command yum install http://au1.mirror.crc.id.au/repo/kernel-xen-release-6-3.noarch.rpm I ...
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KVM/Qemu Guest Shutdown problems

on both host and guest running CentOS 6.3 with KVM/Qemu virtualization, I have the following scenarios: "virsh shutdown kvm1" did not shutdown at all. virsh lists guest as running. "service ...
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1answer
495 views

KVM with external IP without NAT?

I have a CentOS 6.3 server with 1 NIC (eth0) and an external IP (lets say 1.2.3.4). On this server I'm running a CentOS 5.6 KVM with the "default settings" (virbr0 on 192.168.122.x). What I want to ...
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4answers
8k views

tomcat6 on CentOS 6: cannot stop/restart service

I have this problem with stopping and starting tomcat6 (package from the repos). I've seen with several CentOS 6 and RHEL 6 boxes. The symptoms are that when I want to restart or stop tomcat6 it just ...
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4answers
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Centos 6.3 Bind hangs on “Generating /etc/rndc.key”

I'm installing bind on a clean Centos 6.3 system. In previous versions that would work like a charm, but now I get Generating /etc/rndc.key when trying to start bind after the installation. ...
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1answer
1k views

Error installing OAuth on CentOS 6.0

I'm not sure what to do here cause I'm getting the same type of error overall as i try to install oAuth on this cloud slice. I'm not sure what to do but I would think that I need to update or ...
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2answers
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How do I get my Proxmox VM to access the internet without a public IP address

I would like to create a proxmox vm and have that vm be able to ping/access external websites without having to assign a public ip to it. How do I do this? The VM is running centos 6
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1answer
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Zabbix not getting data for one filesystem

I have Zabbix monitoring disk space for several volumes on several servers. It works fine on all of them except for one of the volumes on one of the servers which always reports as 0. However, when I ...
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1answer
238 views

Sync virtual machine hostname to displayName in VMware ESXi 5.1

How can I read the paramater called displayName in the .vmx file or "Virtual Machine Name" in vSphere Client from within the VM. If this is possible with vmtoolsd I haven't found it yet. ...
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1answer
80 views

I need to mount directory from one hdd to public_html folder [duplicate]

Possible Duplicate: Hard drive on server which hosts public_html folder is full. What to do? i have a hard drive (1TB) which has a folder named "flvideo2" i need to mount into ...
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1answer
2k views

httpd, vsftpd and the annoying selinux

I have a CentOS 6.3 installed with httpd running and vsftpd but I am unable to balance permission between the user able to upload over ftp and their website working. What I do: I create a user with ...
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2answers
744 views

CIFS Mounting Permissions

I have an issue that I;m going round in circles with, I hope you can help. The Set up: Server 1 (CIFS Client) - CentOS 6.3 AD integrated uing Samba/Winbind & idmap_ad Server 2 (CIFS Server) - ...
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1answer
491 views

Windows 7 NFS client slow

I have a CentOS 6 VM running on a Windows 7 host. I have NFS server running on the VM, and mounting it via windows' built-in NFS client on the windows host. However, it is incredibly slow. Namely, ...
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2answers
784 views

anacron screws my crontab?

My system is CentOS 6.3 , I notice my /etc/cron.daily are not executed at 4:01 AM , instead , these scripts are executed at random time . I searched and seemed it is 'anacron' that screws up my ...
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1answer
127 views

Running adb from PHP

I moved from Ubuntu to CentOS and I now have a problem running adb from PHP. I am trying to execute shell_exec("/path/to/adb devices"); and I get: ADB server didn't ACK failed to start daemon error ...
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387 views

SSHFS on startup CentOS 6.3

I edited the file /etc/rc.d/rc.local and added the following lines in order to mount a remote directory through sshfs at boot time: su user -c "/usr/bin/sshfs -o idmap=user -o reconnect -o ...
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5answers
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How do I automate OS installation on 500+ machines?

My company has to image a large amount of machines by the end of the year. Each of the machines will have hardware RAID 1 and running CentOS 6. What options do I have for automating the OS ...
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1answer
385 views

Doubled up RAM to 32 GB - now how to speed up a “LAPP” server?

I run a small Facebook game at a CentOS 6.3 quad core machine with PostgreSQL 8.4.3 + few PHP scripts (doing mostly select queries) + 1 Perl daemon and even though the server worked ok, I've suggested ...
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2answers
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Create a super user in MySQL 5.5 not working: Permission denied for root@localhost

Using CentOS 6, logged in to MySQL as root, entering the command: create user 'user123' identified by 'pass123'; works fine. But when I try and give that user super user privileges with: grant ...
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2answers
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Where located /etc/ldap.conf in CentOS 6.3?

Where I can find /etc/ldap.conf file to configure system authentication through LDAP in CentOS 6.3?
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CentOS iscsi initiator has session but there is no block device

I have installed the scsi-target-utils package on CentOS and I used it to perform a discovery. The discovery did give me an active session. I restarted the iscsi service but I do not see any new ...
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1answer
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CentOS 6 gnome-terminal font is garbled until Arabic Support is installed

My default VM images for CentOS 6 are always installed with the most minimal set of packages. When I need a machine with a graphical install, I upgrade with yum groupinstall Desktop. I've noticed ...
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Where to look for regular scripts?

It seems to me that our server freezes every 30 days around noon due to the huge utilization of xvda data transfer partition - writes are 50 times higher than normally (according to the health monitor ...
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1answer
377 views

Is this an OK way to install Apache with SSL on CentOS 6?

I'm setting up a CentOS 6 server on a VPS. I've worked with Apache before, but I've never dealt with CentOS 6. I guess it would just be this right? sudo yum install httpd -y sudo yum install mod_ssl ...
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1answer
904 views

VM does not show up in virt-manager, how to troubleshoot?

I spun up a VM using virsh create, and I am able to see the VM in virsh list, however, when I run virt-manager, I am unable to see the VM in the GUI I am trying to use virt-manager to access the VM ...
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1answer
37 views

Secondary backup server

I've been given a task to implement a backup solution in the event of our website goes down. It is a dedicated server running centos 6. From what i've experience on our server, our server may go down ...
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1answer
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How to update Tomcat on Centos 6.3?

I'm running CentOS release 6.3 (Final) and I have Tomcat 6.0.24 installed: # yum info tomcat6 Loaded plugins: fastestmirror, presto, priorities Loading mirror speeds from cached hostfile * base: ...
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1answer
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Installing a custom 'non-rpm' kernel in CentOS 6

I've built a custom kernel using kernel.org, it has no .rpm file. How do I manually: Install the Modules to /lib/modules (make moduleinstall or something?) Make the initial ramdisk Update grub I ...
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3answers
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Is Linux 3 kernel series compatible with CentOS 6?

For proper TPROXY support I was looking for a STABLE Linux kernel of at least version 3.2.30. Do they want us to upgrade to version 3 of the kernel? And is that compatible with CentOS 6?
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1answer
175 views

OpenVZ VMs redirect to main node?

I have a new fresh CentOs 6 machine and have SoulsVM and OpenVz installed on it. When I create VPS it came online with no problem. When I try to SSH to the VPS it gave me "Access Denied." I reset ...
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2answers
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Should logs for /opt go in /var/opt or /var/log?

A package I'm using (Graphite) insists on installing into /opt/graphite. Should logs go into /var/opt/graphite/log, or /var/log/graphite? Presume we want to be as FHS as possible. I'm using CentOS ...
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2answers
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does KVM raw images support preallocation?

I was trying to create a raw image with this command: qemu-img create -f raw -o size=200G,preallocation=metadata file.img but seem that it raw images doesn't support preallocation. if so why there ...
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4answers
870 views

iSCSI timeouts under high load

I have two servers connected via Gigabit Ethernet. One is iSCSI target, the second one is initiator. When I run mkfs.ext4 at initiator, after a while disk IO slows down critically in target. In the ...
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Can't create LVM due to: not found (or ignored by filtering)

I'm planning to use LVM for KVM, and when I try to create a VG it fails, so how can I create my VG and LV ? Thanks [root@server ~]# vgcreate virtual-machines /dev/sda Device /dev/sda not found (or ...
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1answer
449 views

Lustre - issues with simple setup

Issue: I'm trying to assess the (possible) use of Lustre for our group. To this end I've been trying to create a simple system to explore the nuances. I can't seem to get past the 'llmount.sh' test ...
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1answer
116 views

Enabling one interface breaks connectivity on another

I got a server with 2 NIC's. One is the external interface, that has a public IP. When only that interface is up, I can ping it fine from our internal network. When I enable the second interface ...
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2answers
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pg_dump not working - do I need to change order of $PATH?

I'm trying to set the $PATH to pick up the latest version of pg_dump as I'm currently getting a mismatch error while doing a migrate in my Rails app (I recently changed the schema type to SQL). I ...
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1answer
553 views

APC module causing strange error

When I run php -v I get: PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib64/php/modules/apc.so' - /usr/lib64/php/modules/apc.so: undefined symbol: php_pcre_exec in Unknown on ...
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2answers
786 views

howto remove udev from centos(lxc-guest) without dependencies

i downloaded a openvz template for my lxc server to create a new centos 6.3 guest. Now the guest is not starting because udev is hanging in the boot process. Last time i didn't had this problem but ...
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4answers
6k views

How to install php-devel under CentOS 6.3 x64?

I'm trying to install php-devel on my CentOS 6.3 VPS and get a failed dependencies test. From phpinfos(): SYSTEM Linux 2.6.32-279.5.2.el6.x86_64 #1 x86_64 NTS error: Failed dependencies: ...
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2answers
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How to add interface alias on RHEL6 or CentOS6 with NetworkManager?

How to add a network interface alias (for example eth0:0) on CentOS6 or RHEL6 in the "correct" way that is through NetworkManager without NM_CONTROLLED=no. And this has to be done without GUI. Thank ...