Questions specific to the CentOS Linux distribution. Use this tag if your question relates to how the CentOS distribution affects your problem; do not use it if you just happen to be using CentOS and your question is about a specific configuration detail or syntax.

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2
votes
1answer
2k views

ping receives no packets, but tcpdump can see them coming in

I'm migrating an old Ubuntu OpenVZ instance (Jaunty) to a new CentOS 6.3 host (using vzdump/vzrestore). Now networking does not work properly. Facts: It works just fine if a setup a new OpenVZ ...
-1
votes
1answer
285 views

Linux for real time production server [closed]

I would like to know a linux OS for a real time 24x7 running production server. I have heard that RHEL is pretty stable & suitable for this type of usage. Now I would like to know how it is ...
2
votes
2answers
2k views

RHEL 7 (CentOS 7) security / ssh / sshd_config advise requested

I am not a sysadmin and try to create a more or less secure web server (LAMP based CentOS 7). I read several tutorials about setup an initial CentOS 7 droplet and got everything running fine. ...
3
votes
1answer
351 views

sudo -i returns an error [closed]

When I try to switch to root using sudo -i i get the error /var/tmp/sclDvf3Vx: line 8: -i: command not found... However, su - works which I will continue to use. I'm by no means a linux system ...
1
vote
2answers
4k views

Enable ssh host to guest & guest Internet on CentOS 7 guest with VirtualBox

I have 2 CentOS 7 guests running in VirtualBox on a Ubuntu host. I want to be able to: Connect using ssh from host to guest Download/install packages from the Internet on the guest. I currently ...
0
votes
2answers
2k views

Installing latest wireshark impossible?

It looks like installing a later version of wireshark is near impossible on redhat 6. I've searched the web extensively and can't find any questions where someone has said their issue was resolved. ...
3
votes
1answer
9k views

How can I add an application to the Favorites section of the Applications menu in CentOS 7?

I have created a custom application entry in the applications menu for Eclipse as follows in a file /usr/share/applications/eclipse.desktop as follows [Desktop Entry] Version=1.0 Name=Eclipse ...
-2
votes
3answers
6k views

Cannot ping from CentOS 7 host, but I can browse and lookup domain name

I have new CentOS 7 box and I have a problem with the ping command. When I try to ping ping google.com I get time out and 100% packet loss, but I can dig/nslookup google.com, and I can browse ...
0
votes
1answer
304 views

Putty not asking for Two Factor Authentication Code

I'm running a CentOS 7 server. So I've installed Two Factor Authentication with Google Authenticator a while back and all was well. However I can't access my server at the moment over SSH. PuTTY and ...
1
vote
1answer
67 views

Email evading my spam filter

I'm having trouble with email evading my Barracuda Spam firewall. I believe the spammers are using my A Record to bypass my MX Record which is what directs email to my Barracuda for processing. How ...
6
votes
2answers
7k views

Cannot connect to any localhost connections

I'am using Centos 6.5 with latest updates. My problem is that whenever i try to connect to some local service it just hangs for example: wget wget 127.0.0.1 --2014-03-11 12:43:42-- ...
2
votes
2answers
554 views

SMB Mount To Windows Server Appears to Lock up. Any Ideas?

We are running CentOS 6.3 with all the latest updates. (Attempt to resolve this issue) The Server I am trying to connect to is a Windows Server 2008 R2 box. Though this applies to our old SBS'03 Box ...
0
votes
0answers
442 views

Installing owncloud8 on CentOS 6

I'm trying to install owncloud 8 on CentOS 6 - the problem is that the default CentOS repos have only php 5.3 - but owncloud 8 requires php 5.4. So following this guy: How to install Owncloud on ...
4
votes
2answers
242 views

Allow virtual terminal switch only for root

I'm currently working on a CentOS system (with Gnome desktop), where i want to disable the use of console for non allowed users. Actually when logging in with a standard user it launch my app and ...
0
votes
0answers
195 views

CentOS: Connection reset by Peer error while running python script

For my college project I am building one traffic generation tool using python. I have developed my own linux server and client on Vmware. I am using urllib2 for traffic generation in python. The ...
5
votes
1answer
1k views

What is SSTP vpn server and how can I run one?

I've read a couple of L2TP and PPTP tutorials on the net and there are just dozens of "running PPTP/L2TP on Linux" guides available out there and I successfully made packages like open-swan or pptpd ...
0
votes
1answer
222 views

How do I limit inbound and outbound bandwidth to and from a specific host on CentOS

As the title says, I am trying to limit inbound and outbound bandwidth to and from a specific host on CentOS. The reason is that this host consistently uses a large amount of bandwidth and this needs ...
3
votes
0answers
604 views

Fedora 14 Xen virtual machine does not detect network

I'm trying to create a para-virt Fedora 14 Xen vm on a host running CentOS 5.5. The VM appears to initially install correctly (the installer finds eth0 and can access the installation media). But when ...
1
vote
1answer
2k views

CentOS 7 No package … available

(CentOS 7 64 Bits) Following these steps: http://freevps.us/thread-2789.html I get errors, anyone can help me please? STEP 2, running this command yum install libICE.so.6 libImlib.so.1 ...
2
votes
1answer
3k views

System Halt on REBOOT, Shutdown & Restarts as expected

Recently went from Centos 6.4 to Centos 6.5. System is Dell T410 Tower. Whenever I reboot, system runs through post, passes IPv4 Settings, then announces: PCIe Training Error: Slot 1 system halted ...
1
vote
0answers
59 views

Preventing automount in CentOS 7

How can I tell CentOS 7 not to mount a new IDE drive (new to the system, but with data I want to examine) the first time I plug it in, so that I can do forensic analysis on it knowing I won't have ...
1
vote
0answers
493 views

Timezone problems with CentOS under VirtualBox

I have the following problem on a CentOS 6.5 system running under VirtualBox v4.2.4 on Windows 7 Pro SP1. date always prints a UTC time but with the correct timezone shown, e.g. if I run date at ...
1
vote
1answer
48 views

default owner and group for symlink and chown pass-through

I have two questions but they are very closely related to each other. I have a new Debian server by Linode, and my previous server was a CentOS run by Hostgator. I use this command quite frequently ...
1
vote
2answers
122 views

Live resizing of an ext3 filesytem on CentOS6.5

I have a problem with my remote server hosted by my provider, I have only SSH access. The problem consist of getting this error file system rootfs has reached critical status that causes problems with ...
1
vote
1answer
64 views

Analyzing logs offsite, with a different computer

I have a computer deployed with no internet access. I have small windows in which to copy the log directory to a USB stick and analyze offsite. If I pull the logs off of a CentOS / RHEL system ...
0
votes
2answers
5k views

Error 8000: Bad sectors when installing Centos 6.5 Minimum

I downloaded the ISO Centos 6.5 i386 and burned it onto a disk. When I try to install it on my computer, I get the following with install or upgrade an existing system .loading vmlinuz..EDD: Error ...
0
votes
1answer
124 views

Why doesn't my IOstat change its output at all?

My IOstat doesn't change...at all. It'll show a change in blocks being read and written, but it doesn't change at all when it comes to blocks/kB/MB read and written. When the server sits idle...it ...
1
vote
0answers
177 views

32-bit package from a repo that should only contain the 64 bit packages

Trying to a do install of some packages and it seems that it is trying to pull a 32-bit package from a 64-bit repo. Installing for dependencies: cyrus-sasl-lib i686 ...
1
vote
4answers
130 views

How can I update a password without entering the password twice?

I effectively have a sticky keyboard (host machine to RDP to vCenter to virtual console), but need to update the password of a VM I am building. Using the rescue environment CentOS media offers, I ...
0
votes
1answer
310 views

How to install udisks1 in CentOS 7?

I have several scripts that I need for various tasks with USB devices, but they were written with udisks1 in mind. Porting them over to udisks2 has proven difficult, if not impossible, so I'm ...
0
votes
1answer
635 views

Problem with routing tables network interface in Centos 6.6

I've problem with the routing tables, I've 2 network interface. (2 interfaces with 2 difference network address IP address: 112.xxx.xxx.xxx: static IP and 10.xxx.xxx.xxx local IP) 1: IP address is: ...
30
votes
1answer
45k views

what is the CentOS equivalent of /var/log/syslog (on Ubuntu)?

On ubuntu this file exists: /var/log/syslog. However the same file does not appear on CentOS Distributions. What is the equivalent file on CentOS?
0
votes
1answer
580 views

NFS File Mounting error in centOS

I'm trying to mount server filesystem using NFS in centos. But I'm getting Connection timed out error. Below are the steps I followed. At server side: [centos@ip-172-31-46-199 landingzone]$ sudo vi ...
0
votes
1answer
32 views

unable to block out-going traffic

I've run $ iptables -I OUTPUT -j DROP -d [ip address] and found that some processes are still connecting the destination ip I've blocked above: $ lsof -p [pid] it shows: ...
0
votes
1answer
5k views

warning: mysqli::real_connect(): Headers and client library minor version mismatch. Headers:50537 Library:50623

warning: mysqli::real_connect(): Headers and client library minor version mismatch. Headers:50537 Library:50623 How do I do with it? I think I have a different version between mysql client and ...
0
votes
0answers
69 views

openvpn enable to connect to the server

I have centOS 7 64 bits, When I try to connect with openvpn my client.conf I have this error: Mon Mar 16 09:11:26 2015 TLS_ERROR: BIO read tls_read_plaintext error: error:14090086:SSL ...
1
vote
1answer
282 views

Yum update is not working properly in centos

Yum update is not working.I am not able to ping the external networks too yum update Loaded plugins: fastestmirror, refresh-packagekit, security Loading mirror speeds from cached hostfile ...
2
votes
0answers
2k views

nginx: [emerg] “server” directive is not allowed here

I get the following error message when trying to configure server: []# nginx -s reload nginx: [emerg] "server" directive is not allowed here in /etc/nginx/conf.d/hello-world.conf:1 Configuration is ...
2
votes
1answer
2k views

What are gpg-pubkey* packages?

I compared the packages list reported by RPM and YUM on a CentOS 6 and 7. I noticed the lists were slightly different (same issue with RHEL). See Listing installed packages with yum and rpm mismatch ...
5
votes
5answers
892 views

Automatically acquire new IP address in new network

I'm running a Centos virtual machine on a laptop using a bridged network connection to avoid double-NAT issues, with the address assigned via DHCP. This works fine until I move the laptop to another ...
1
vote
1answer
93 views

Ananconda kickstart

I am trying to use packer to build a virtual-box image using kickstart however the ananconda install fails due to lack of installation source and no software selection my kickstart script is shown ...
3
votes
1answer
2k views

CentOS 6 interfaces bonding, round-robin instead of active-backup, duplicates frames

Two interfaces, eth0 and eth1 are part of a network bonding bond0 on CentOS 6. All worked well under CentOS 5, but after the upgrade to CentOS 6.6, keeping the same configuration, the network works ...
1
vote
2answers
3k views

Enable 9p filesystem type in Centos 6 virtual guest?

My question is linked to this one : http://stackoverflow.com/questions/17880460/mounting-shared-folder-in-kvm-vm-error-mount-unknown-filesystem-type-9p (but can't comment it) I have apparently the ...
1
vote
0answers
447 views

Is it possible to convert RHEL to CentOS?

The software vendor that we used has always specified that we should load RHEL on servers we've bought to run their software however they did start to accept CentOS and even now prefer it on new ...
0
votes
1answer
46 views

Standards for dealing with older/previous “.bak” backup of config file before new edit

Assume I have a config file "foo.conf." This file is rarely edited. At some point in the BeforeTime(tm) it was edited and "foo.conf.bak" was created to save the previous state. Now, I want to make ...
0
votes
0answers
110 views

putty does not allow me to input special chars

I am having trouble accessing a folder with a very long name with • in its name. seems like every time I try to input • the putty window is not parsing the character successfully. Any ideas?
1
vote
1answer
3k views

NginX + PHP-FPM displays blank php pages

I have a problem where my server running NginX with php-fpm loads blank PHP pages (strangely except for my phpinfo.php file, which loads normally). If I put an index.html page in the same directory ...
2
votes
1answer
388 views

firewalld rules to route two user groups to different apps in OpenVPN

I have OpenVPN successfully configured on a remote CentOS 7 server to allow https access to employees and administrators, while also blocking ssh access to everyone who is NOT an administrator. This ...
0
votes
0answers
245 views

How can I disable FTP access/login for users

I want to temporarily disable the FTP Access of the FTP users I have tried following commands for user "aadmi" but still able to login sudo passwd -l aadmi which said Locking password for user ...
0
votes
1answer
386 views

CentOS 7 VNC users dont share desktop session

I installed VNC server on a CentOS machine. I set up a user, and then enabled the VNC server for them on startup following these steps: ...