CentOS is an Enterprise-class Linux Distribution derived from Redhat Enterprise Linux sources freely provided to the public.

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How to install FileZilla on CentOS?

I downloaded FileZilla from here Now how to install this on CentOS? I used yum install filezilla but it is showing errors like: Loaded plugins: fastestmirror, refresh-packagekit, security You need ...
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178 views

Performance Issue: AWS Medium Linux Instance V/S Hetzner Dedicated Instance

I am testing an AWS Medium Instance with CentOS (AWS AMI) and comparing it with Hetzner's EX40-SSD (http://www.hetzner.de/hosting/produkte_rootserver/ex40ssd). Software setup on both is comparable( ...
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191 views

How does KVM set its own netfilter rules?

I've been poking around with KVM VM's on Centos 6.4 and after some hair pulling and copious amounts of trying to break my desk with my head due to not having an internet connection on my VM's, I found ...
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348 views

Installed CentOS, Now There is No Windows 8 Options on Restart

I bought a new PC with Windows 8 and wanted to dual-boot linux. I shrank the partition by 50GB in windows, then installed CentOS from a live CD. CentOS is working fine, but I can't boot into ...
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57 views

Why env variable are not visible while starting a service

I am wondering why during service start up environment variables are not visible. To be more precise: I created service startup scrip according to LSB spec which starts some java process. For this ...
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284 views

Why does getfacl remove the leading / from absolute pathnames?

I'm in the midst of learning about ACL's for Centos/Red Hat 6 and when I run getfacl using an absolute path I of course get among the output: getfacl: Removing leading '/' from absolute path names ...
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175 views

php Mails not send with in domain

My setup : Our current server 90.0.0.50 [example] which is containing domain testdom.com. testdom.com's MX record points to Google mail. Due to some issues we need to host our domain on some other ...
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2answers
110 views

Restarting network service for a local VM via SSH

During the course of practicing switching my local VM from static IP to DHCP and vice versa via system-config-network, I decided I didn't like having to access the VM's console through virt-manager ...
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347 views

Linux CentOS 5.5 not connecting to Network

I have installed Linux CentOS 5.5. During installation, I configured the LAN driver and gave it an IP address. After installation, I checked the network connection but it shows "not connected". I ...
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2answers
196 views

Open a port CentOS

I'm new in CentOS and I'm trying to create a little script in Python, something like: $ python -m SimpleHTTPServer If I try to access port 8000 in my web browser, I don't get access, however if I ...
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1answer
317 views

Yum, force the update of dependencies

I have a package with several dependencies. I updated my repo with the given package and his dependencies but when I'm updating the package dependencies are not updated since the required versions are ...
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106 views

CentOS test page and .htaccess

When I use the line below in the .htaccess file, I get the apache CentOS test page. RewriteCond %{REQUEST_FILENAME} !-d How can I fix this?
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How to install Sun/Oracle Java 1.6 onto centOS 6 using only textmode?

So, after a few days of struggle I have yet to be successful in installing Sun/Oracle java 1.6 onto my CentOS. The issues seem to be as follows No sun java 1.6 package available in repo due to ...
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253 views

Why is NetworkManager attempting to control an interface script that doesn't exist?

I'm showing hundreds of frequently repeated entries in /var/log/messages that don't make sense. More below the example. Here's an example, which is repeated ad nauseam in the log file: Oct 15 ...
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1answer
93 views

CIFS mount fails when read is interrupted

I have a functioning CIFS mount from CentOS 6.4, 2.6.32-358.18.1.el6.x86_64, to a Windows file server. If I hit Ctrlc while doing some IO intensive (like fgrep -r), then the mount (and all other ...
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1answer
754 views

openvpn[]: Options error: In [CMD-LINE]:1: Error opening configuration file

when trying to service openvpn start Oct 12 14:02:01 ccushing1 openvpn[9091]: Options error: In [CMD-LINE]:1: Error opening configuration file: devnet-client-vm.conf running openvpn ...
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1answer
130 views

Intermittent ssh denial

The main server in my network (nothing less...) plays tricks with its ssh connectivity. It is a CentOS 6.4/64 (runs as KVM-based virtualization host with a dozen VMs on it). It receives its IP via ...
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21 views

Indentifying a linux container [duplicate]

Is there a simple way to identifying a linux container?, just like with a xenserver vm you can input the command uname -a and the result contains the word "xen". Linux hostname 2.6.18-348.6.1.el5xen ...
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331 views

CentOS restore firewall after `service iptables panic`

My friend and I were doing some firewall configurations and in the meanwhile he thought it was a good idea to type service iptables panic. Now we cannot put the firewall back on the original state ...
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2k views

Globally change path for all users, even in cron

We're setting up an SGE cluster with CentOS 6. My sysadmin is installing applications that are not installed via RPM (i.e. via other means like make install) should go in a non-standard directory, in ...
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2answers
837 views

error: “net.inet.ip.fastforwarding” is an unknown key

I've been doing some research into improving performance for OpenVPN and I found out about setting fastforwarding to 1 but when I tried I got the error error: "net.inet.ip.fastforwarding" is an ...
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2answers
837 views

SSH connection establishment too slow [duplicate]

I'm having issues while connecting to my Local Centos 6.3 VM with 500 MB ram. Below is the output of ssh -vvv localhost connection: OpenSSH_6.3, OpenSSL 1.0.1e 11 Feb 2013 debug1: Reading ...
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2answers
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How To Install Thunderbird 24.0 on centos

How do I update thunderbird to latest version 24 on centos 6.3 (final) 64bit. I cannot find any good tutorial on installing it on centos. Merely copying and pasting the 'thunderbird' folder in ...
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1answer
202 views

CentOs eth2 wont start on reboot

I have Cent OS 6.4 inside my virtualbox with two ethernet devices. One is connected to the internet with NAT, the other is connected to the internal network. here is my eth2 config file cat ...
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298 views

Centos6.4 Kickstart stuck at %POST

I have the below kickstart %post, but it hangs at the Post Installation Screen. Any thing I had missed or done wrongly? Thanks. %post --log=/root/my-post-log ( echo "# Running Post Configuration #" ...
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3answers
360 views

Where is ACL data technically stored?

I'm studying ACLs and am confused on where this information technically resides. Is this just technically just meta data from inodes?
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48 views

Why can't ACLs block users from having access to their own home directory?

CentOS 6.x In the process of studying ACLs, I came across this blurb in my training documentation: However with ACLs, you can't deny access for a user to his home directory While I can't think ...
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1answer
186 views

Broken sudo on amazon web services ec2 linux centOS

So I had no idea of the dangers of messing with the /etc/sudoers file, and was just trying to make a simple change in there. However, I seem to have put something with incorrect syntax in there, ...
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73 views

CentOS 6 and Fedora Repositories

I did a Google search and couldn't find the specific answer to my questions. I know CentOS and Fedora are extremely similar. Would a Fedora repository (i.e. ...
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106 views

Not able to install Nautilus Terminal

I am using centOS Release 6.4(Final) and GNOME 2.28.2. System information is Linux localhost 2.6.32-358.11.1.el6.x86_64 #1 SMP Wed Jun 12 03:34:52 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux I ...
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1answer
102 views

CentOS 6 - No Updates

I've had a CentOS 6.3 VM set up for some time now, but I'm not seeing any updates when I run yum check-update, or yum list-security. There has to be something (especially with Apache/MySQL!). If I ...
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606 views

kickstart bootloader --driveorder configuration

I use a kickstart file for a customized install CentOS. On certain machines, if a memory stick is in the USB port, it fails because it tries to install CentOS on the memory stick. Kickstart current ...
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117 views

Computers are restarting spontaneously and simultaneously, how do I find the cause?

I have two computers that spontaneously shut down and rebooted (this happened more than once), both are identical hardware and were installed from the same image (CentOS 5). They are controlling some ...
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3answers
2k views

jemalloc and other errors making redis on centos 6.4

I am setting up a new, dedicated, centos 6.4 system with redis. I have installed redis many times, but have never hit this issue (and have never been on centos 6.4 before). cd redis-2.6.16 sudo make ...
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122 views

Firewall config prevents hibernate connecting to postgres in CentOS6.3

I have an operating environment in CentOS 6.3 that has tomcat7 and postgres9.2 installed. There is just one web application deployed in tomcat that tries to establish a connection from localhost to ...
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304 views

ERROR: could not find driver after changing from mysql to mariadb

mysql was working fine but I wanted to give mariadb a try on a new server I have going. However I am having an issue where all my php websites seem to have issues communicating with mariadb. Webmin ...
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2answers
864 views

replace xen kernel with non xen kernel

I have a virtual appliance in Xen format (XVA) that I wish run to on another hypervisor (MS Hyper-V). What have I done so far: I have converted the XVA to OVF using XenConvert, this resulted in a vhd ...
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1answer
166 views

Centos VM network configuration problems [closed]

Hi I am new to this stuff and confused. I have a CentOS VM and I cannot get it to see the outside world. I have a bridged adapter. I have tried NAT and a host only network. /etc/sysconfig/network: ...
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1answer
132 views

What are the pros and cons to editing iptables configuration file vs adding rules via the iptables command

I am working with a product on CentOS that occasionally needs to automatically add and remove rules from the iptables configuration. For example, during an update, we want to explicitly refuse ...
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1answer
108 views

Any guides for dummies to setting up a VPN?

I am looking for a guide to setting up a VPN on a VPS, most of the guides don't explain certain elements and I've been left feeling clueless halfway through them. For example when I was installing ...
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2answers
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How to tell rsyslog to create log file if not there?

Default behaviour by rsyslog is to append traces to an existing log file. Now, I've seen (CentOs, Scientific Linux) that when rsyslog is already running, you delete the log file (e.g. the one ...
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1answer
49 views

error using yum in centos 6

my yum command used to work fine , but now , when I try to use it , it gives me an error : file:///home/user/repo/repodata/repomd.xml: [Errno 14] Could not open/read ...
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1answer
187 views

Access a NTFS external drive in centos [duplicate]

Is there any way to access a external hard drive with NTFS format in CEntOS 6.2 ?
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240 views

how to investigate Firewall blocked outbound TCP

CentOS webserver with CSF (Config Server Firewall) running. Blocking all outbound / Inbound traffic except listed ports 80 81 22 21 etc. for web, mail & FTP services etc. I'm use to seeing heaps ...
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1answer
373 views

How are ACL permissions processed and in what order do they apply to a given user action?

CentOS 6.4 I'm trying to better understand how filesystem ACL rules are processed and in what order ACL rules apply. For example, let's say users bob and joe belong to a group called sales. Let's ...
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102 views

What package is necessary to install for the getacl command? [closed]

CentOS 6.3 I'm studying Access Control Lists and for some reason, the getacl command isn't available. When I try running it, I get: [root@foobox test] getacl test.txt -bash: getacl: command not ...
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Why does find -mtime +1 only return files older than 2 days?

CentOS 5.9 I'm struggling to wrap my mind around why the find interprets file modification times the way it does. Specifically, I don't understand why the -mtime +1 doesn't show files less than 48 ...
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2answers
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Open a port in my CentOS

I'm trying top open a port on my CentOS machine: I edit the /etc/sysconfig/iptables file and add my rule: -A INPUT -p TCP -m state --state NEW -m tcp --dport 143 -j ACCEPT Then I restart the ...
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184 views

What is linux peth* and virbr* network interface?

Usually when execute ifconfig I got the "usual" network interfaces: wlan0, eth0 and lo. Those, I suppose to be my PC's wireless adaptor, ethernet adaptor and localhost. I'm using a remote server that ...
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61 views

Run a command when system starts for any users [duplicate]

How can my system run a command every time that it is started? Is there any script that the system runs when it is starting? I'm using CentOS 6.2.