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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234 views

Centos 6.2: Unable to open terminal after vbox save state

I'm experiencing this issue frequently. Usually, I work on my Centos 6.2 in VBox for a while and then close it by saving state (going to other machines or doing host work). Then, I resume my session ...
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4k views

centos 6, hostname won't resolve, dns issue, loop detected

I've searched everywhere and tried all the suggestions that I've seen, but I just can't get this to work now (it was working before). This is the first time I've ever installed a test server that I ...
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0answers
103 views

Allocating resources to VPS's

I need a layman's term definition of these parameters and what they do in terms of allocating resources to servers, as I'm having issues with the VPS's that I set up, as Java seems to be unable to set ...
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0answers
458 views

Fail2ban showing error Unable to contact server. Is it running?

We start fail2ban in centos using this command service fail2ban start but when we run service fail2ban status we get as below? What could be the mistake ya? Fail2ban (pid 2810 2813) is running... ...
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0answers
199 views

iSCSI on startup

I've configure iSCSI but CentOS 6.3 is unable to recognize if on startup. Here is fstab config: /dev/sdb1 /home ext4 _netdev 0 0 Here is iscsi.conf ...
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101 views

How to install master branch of freeradius on Centos

Could someone take me through the steps to install the master branch of freeradius on a fresh Centos 6 installation?
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0answers
472 views

Editing isolinux leads to kernel panic error in Centos Live CD

I downloaded a CentOS Live CD and tried to customize features on it. The CD boots fine if I use it "as-is". If I edit "isolinux.cfg" to edit the change the title of the CD or the automatic boot time, ...
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457 views

Set default Soundcard Centos

How do I set my default soundcard on Centos/Linux? I have two soundcards installed on my system and it always detects the wrong one, upon boot.
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0answers
125 views

Naming process in init scripts

I'm trying to write an init script that will start a service that needs to have started postgresql server before. Bellow is the postgresql's init header: #!/bin/sh # # postgresql This is the init ...
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551 views

RHN Satellite scout won't push

My RHN Satellite (Spacewalk) server is having issues with monitoring. The Spacewalk Monitor Scout will not push out successfully. It always stops with a Request Expired status. I can't seem to find ...
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0answers
2k views

After install Centos 6.3 from USB, it doesn't boot

I installed CentOS on my machine from my USB. I did a minimal CentOS USB drive with UNetbootin. After I install the CentOS, when i try to reboot, it does not starts. I have only the cursor blinking on ...
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727 views

Can't launch Snort on CentOS 6.3

I have a problem installing Snort on CentOS 6.3 in a virtual environment. When I run snort - ./snort status: Running in packet dump mode --== Initializing Snort ==-- Initializing Output ...
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234 views

Multiple Sessions and 1 is slow

Setup is a Centos 6 x64 server and a Windows 7 client running putty. Multiple sessions are opened to this same server from the same client. Periodically, one of these sessions slows to a crawl and ...
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0answers
697 views

Install CentOS in a VirtualBox to a Compact Flash and use it on a mini PC

I got into a very specific situation and want to get to know your opinions. I have got a mini PC with Intel Atom processor which should run CentOS with an upgraded kernel to 3.x and some ...
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0answers
916 views

I can't find my tape library changer under centos 5 with a quantum scalar i40

i have a quantum scalar i40 connect on a centos 5 machine trough SAS interface. I fight with it since a while because the media changer does not work. I finally understood yesterday that the system ...
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0answers
372 views

ffmpeg: error while running with libx264

Main code: ffmpeg -i 2269801.avi -threads 0 -vcodec libx264 -b 900k -acodec libfaac -ar 44100 -ab 96k -ac 2 earthgirlsareeasy1.mp4 [libx264 @ 0x16cdde10]broken ffmpeg default settings detected ...
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0answers
270 views

i386 libtool conflicting with x86_64 libtool when installing Handbrake

I've been trying to install Handbrake on centos 5.8 with the help of some different guides. I'm running x86_64, and whenever I try to install packages necessary to build the binary, the arch ends up ...
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0answers
987 views

Hanging at “Running Transaction Test” when trying to install php-soap

I have here a CentOS 5 and I'm trying to run yum install php-soap but the installer hangs on and the last step is Running Transaction Test. I found out that NFS shares are the problem. See here or ...
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0answers
12 views

Centos VMWare backup emergency mode password reset

I have recently backed up my remote virtual machine and downloaded the data into my local. I did the setup on my local with VMware workstation and tried starting the server. I realized I missed ...
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0answers
30 views

permission denied, cannot list files within a folder

I have a folder like: drwx--xrwx 9 user group 4096 May 1 11:17 160429_ST-E00110_0195_AHMFVNCCXX However my user other can't do ls: -bash-4.1$ ls 160429_ST-E00110_0195_AHMFVNCCXX ls: cannot open ...
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0answers
15 views

Can't login after changing username in Webmin

After installing Webmin on my CentOS machine, I changed the root user to root2 using the Webmin interface (Users and Groups module). Now I can't login to Webmin either as root or as root2. How can I ...
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0answers
18 views

Where is my 7za data being written to

I have a weird question about 7za on Centos 7. I am adding a file to a 7za archive using the following command (the total size of the directory is around 40GB) /usr/bin/7za a -ppassword -t7z -mmt=off ...
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0answers
12 views

stop dm-cache from caching temporarily

I am want to benchmark my system(Centos) IOPS with dm-cache and without dm-cache.I have taken benchmark result for my system dm-cache .Now I want dm-cache to stop temporary so that I can take ...
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0answers
8 views

ssh warning banner on centos 6.7

I am using the kick start installation for my centos 6.7. After installation, the output of mount command looks like below: proc on /proc type proc (rw) sysfs on /sys type sysfs (rw) devpts on ...
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0answers
30 views

How can I enable centos-release-SCL on Centos 6.7?

I am trying to install centos-release-SCL on CentOS 6.7. I want to do this to get python2.7. I have tried: sudo yum --disablerepo=\* --enablerepo=extras install centos-release-SCL Loaded plugins: ...
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0answers
9 views

can systemctl check dependencies across servers

I have recently started to convert init scripts to systemd style. I see that there is a "depends" and "require" attributes in systemctl service files that checks for dependent processes to be running. ...
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0answers
27 views

How centos7 boot more than 2TB

We are struggling with booting a centos7 with 3To. We are working on an IBM BladeCenter H and SAN . There is no EUFI. Thanks for your help
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6 views

Where is the “use empty space” option in centos 7?

I didn't find the "use empty space" (the option was available in centos 6) during the installation of centos 7. I need this option because I am using gparted to have a GPT partition and not an MBR ...
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0answers
53 views

IPSEC help using Strongswan on CENTOS 6.6

I have been tasked with setting up an IPSEC tunnel to our remote data provider. They require my Phase 2 traffic to be PAT'd behind a public address. I am using strongswan 5.3.2 on CentOS 6.6 on a ...
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0answers
19 views

Centos 7.2 Convert single LVM to RAID Mirror Reinstall BootLoader

I am trying to convert a single-drive Centos 7.2 installation with LVM into a two-disk mdadm mirror with mrrored LVM. I was able to follow the excellent instructions at: ...
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0answers
39 views

Centos 7 root passwd reset

I was stupid enough to log my root password on one spot and that crashed so I lost my root password to my server. I followed the guild of ...
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0answers
29 views

Improve CentOS performance while saving

When I save larger files at about 5 minutes of save time, Linux lags completely on my new computer. I can't change workspace or move my mouse. The files are about 50 Gb in size and are used for ...
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0answers
15 views

custom ISO Bootable USB not working

I made a custom CentOS ISO using the link. My custom OS works on the Virtual machine, but I'm unable to install it using a bootable pendrive. Where could I be going wrong?
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0answers
20 views

Failed to start Crash recovery kernel arming

When trying to login into CentOS 7 either through the Gnome GUI or the login shell, I get this: After a second, I get booted backed to the login shell, or login screen of Gnome. I've tried booting ...
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0answers
26 views

Enable internet connection in CentOS 7 minimal version on Vagrant

I'm using Vagrant to run CentOS 7 box under Windows 7 and I can't connect to internet to install some packages. It's a minimal version of CentOS 7 so a lot of commands don't work. dhcpclient, ...
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0answers
55 views

Linux command “systemctl status” is not working inside a Docker container

The command "systemctl status" is not working. It never has. My container is on CentOS 7. When I issue "systemctl status" I get results "Failed to get D-Bus connection: operation not permitted." Path ...
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0answers
39 views

no access to a shared windows 10 printer from centos 7

I have a Win 10 pro laptop on which I attached an USB printer; it works when I try to print from the laptop. I shared this printer, and I have a second laptop, from which I would like to print, it's ...
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0answers
17 views

CentOS7 Livecd login loop after Dracut update to 033-360

I am trying to edit the official CentOS7 livecd build 1406 and after updating Dracut to 033-360 (due to being an nfs-utils dependency) from the original 033-161 I am stuck in a login loop. Further ...
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0answers
15 views

FTP Over SSL not accessible from outside network

We have setup an FTP server over SSL with configuration using vsftpd as below (/etc/vsftpd/vsftpd.conf): pam_service_name=vsftpd local_enable=YES write_enable=YES local_umask=022 anonymous_enable=NO ...
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0answers
29 views

Squid Proxy using two nics CentOS 7.2

Objective: OS: CentOS 7.2 NIC01: eth0 - WAN - (10.1.1.0) NIC02: eth1 - LAN - (10.1.2.0) Box1: Squid/iptables server (Has the two nics) Box2: Workstation (On Lan) I am trying to filter all ...
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0answers
35 views

How do I get a yum repo to work in a Docker container?

What do I do about two Docker containers on separate VMs that have the same IP address on my network? I have two CentOS 7.x servers. Both have exactly one Docker container. When I use ifconfig, the ...
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0answers
23 views

Installing nginx from source error

OS is centos 7.2,installing nginx from source error: sslv2conftest.c: In function 'main': sslv2conftest.c:217:15: warning: 'currtest' may be used uninitialized in this function ...
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0answers
18 views

where is nginx.lock file?

I am using centos 7.2,and I installed nginx 1.9.14 form source, wget -c http://nginx.org/download/nginx-1.9.14.tar.gz tar zxf nginx-1.9.14.tar.gz wget -O nginx-ct.zip -c ...
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0answers
53 views

Yum Update error on CentOS 7 - Require: libQt5 (…)

When I try to run the command yum update, I am getting the following error messages: Error: Package: notepadqq-0.46.1-1.fc20.i386 (FedoraPeople-sea) Requires: libQt5PrintSupport.so.5 ...
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0answers
20 views

top command shows dnss running at 290%

We're running software on a CentOS 6.2 virtual machine and it's been crashing quite a lot lately and keeps running slow. I checked the RAM usage, but that's only using 4GB to 5GB of the available ...
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0answers
13 views

Is there a way to edit video buffer size in google chrome in linux?

Its easy to do in windows but how to do it in google-chrome in cent OS 7. NOTE :I think google-chrome here is not using adobe flash perhaps it does not even need it but still i can play videos.
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0answers
15 views

Environment Modules: installing software

I understand how Environment Modules work, having used them before. I have read the various help pages, and I understand how to write a module file. My question is explicitly about the various ...
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0answers
47 views

Low CPU load but slow websites

I had 2 servers with more than 200 websites on each. few days ago I purchased a new cpanel server and migrated both old servers to the new one. After migrating the first server everything was working ...
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0answers
20 views

SELinux httpd CentOS

I'm having trouble with SELinux and Apache DokuWiki on my CentOS 7 box. First I was unable to read the html directory contents. I disabled SELinux to test and a test index.html that I placed there ...
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0answers
22 views

swap goes the second drive, how can I return it to normal from command line?

The following is my plan for partition of CentOS 6.7. I have two disks with A for system and files, B totally for backup. But, after installation, I log in using ssh root. Here is what I see: ...