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

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1answer
889 views

CentOS with AutoSSH, Port Forwarding Clarification

I'm using autossh and set it up like shown in the following example: http://surniaulula.com/2012/12/10/autossh-startup-script-for-multiple-tunnels/ I found it works really well, but need some ...
0
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1answer
6k views

How to remove Oracle Wallet using orapki?

Hi i'm on Centos using oracle 11g And i've created a wallet using : $ orapki wallet create -wallet /u01/app/oracle/admin/DB11G/wallet -pwd WalletPasswd123 -auto_login Now i want to remove it to ...
2
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3answers
837 views

Does /var/log/secure log successes?

Short one that I've been unable to find a decent answer for. Centos 5.10 server, trying to trawl through all the logs I can to see what IPs successfully accessed the server. I've been mucking about ...
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2answers
63 views

Make python 2.7 the default python in centos, making an alias didn't work

I am trying to install llvm on my centos 6.7. While running the configure file it says it throws the error checking for python >= 2.7... not found configure: error: found python 2.6.6 ...
0
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1answer
162 views

Downgrade Centos 7.2 to 7.1

I am currently using Centos 7.2.1511(check from file /etc/redhat-release) and trying to downgrade it to Centos 7.1.1503 (due to some package installation issue in centos 7.2) using the command yum ...
0
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1answer
85 views

Unable to get rid of repo on Centos 7

I have a Centos 7 machine on which I am trying to install PHP 5.6 and associated binaries. For this purpose, I installed the epel and the remi repos. I also installed the webtatic repo which now is ...
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0answers
53 views

Can't install phpMyAdmin with PHP 5.6

I work on a Centos7 with php56 (via remi-repo) and httpd and maria-db I try to install phpmyAdmin via "yum install phpmyadmin" but every time I have this message: Erreur : Paquet : ...
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2answers
2k views

Why can't I access to my ftp server with my local user account?

First of all I'm using Centos 6 server, putty and wordpress.org I followed the instructions from this link to set up vsftpd and ftp in centos server. For the vsftpd.conf file, these were the changes ...
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1answer
1k views

Installing CentOS from USB results in black screen

I have an old Dell Latitude laptop (running xp) that I'm trying to turn into a test server running CentOS. It doesn't have a cd drive on it, so I'm forced to use a flash drive to try and get the new ...
0
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1answer
92 views

Updating TeamViewer

I installed TeamViewer (v10) on CentOS 7. When I connect to that box, I get a message that the remote software is out of date and that I should click on the label to update the software remotely. ...
0
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1answer
2k views

What variables are valid within /etc/default/useradd file?

My /etc/default/useradd file is as follow: # useradd defaults file GROUP=100 HOME=/home INACTIVE=-1 EXPIRE= SHELL=/bin/bash SKEL=/etc/skel CREATE_MAIL_SPOOL=yes man page for useradd provides many ...
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1answer
3k views

CentOS 7 won't serve static https content, why not?

I just re-installed httpd and created a static index.html file. I have firewalld configured to allow internet access to the https service. But when I type https://my.server.ip in a web browser, the ...
2
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1answer
4k views

Unable to use yum repos whether with baseurl or mirrorlist in CentOS 6.5

Since a couple of days, I'm unable to retrieve repositories data with Yum, in my CentOS 6.5 server. I did yum clean all a dozen of times, it emptied all but didn't solved the problem. I tried to ...
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0answers
28 views

Unable to umount dvd on CentOS 7.2 kickstart installation

I have a kickstart file that was working fine on a RHEL 6 installation before, and now I want to reuse it to provide an automated installation on a CentOS/RHEL 7 DVD (currently testing on CentOS ...
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0answers
42 views

Centos7 crontab @reboot sleep not working

I am currently trying to get my server to relaunch a few things on server reboot but they were failing due to screen not yet being loaded (I believe), in an attempt to fix this I added a 3min sleep to ...
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0answers
27 views

rsyslog not working

I have been trying to start the rsyslog service on centos 7 but I wont work. Please see te configuration file- # rsyslog configuration file # For more information see ...
3
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1answer
46 views

Shared libraries and different linux systems

Is it possible to use a shared library, compiled for example on a RedHat / CentOS system, on a Ubuntu system?
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1answer
26 views

Can't set the locale (man-db.cron)

Everyday I am receiving an email with the following content /etc/cron.daily/man-db.cron: mandb: can't set the locale; make sure $LC_* and $LANG are correct When I check the results of of ...
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0answers
8 views

Claiming node on swiftstack times out

I am trying to connect a node that I have installed CentOS on using SwiftStack. To make this connection, both port 443/TCP and 1194/UDP will need to allow outgoing traffic on your firewall. I have ...
1
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2answers
3k views

Installing Dovecot and Exim on CentOS 6.4

I've been looking for some guides on setting up a secure Dovecot and Exim mail server setup on CentOS 6.4, however it seems there's nothing out there. Does anyone know of any guides - or - if someone ...
1
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1answer
113 views

How to manually configure a monitor in CentOS7, attached via KVM?

I have a fresh desktop install of CentOS7 with Gnome 3. I need to use this machine with a KVM but for some reason CentOS7 cannot detect my monitor through the KVM I have, so it defaults to "Unknown ...
0
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1answer
57 views

Installed OS on EFI system crashes on grub shell

I have installed an el6 based custom OS on an e-mmc drive. This machine doesn't have legacy boot mode, only EFI. The installed OS has grub-0.97-77.el6.x86_64.rpm. Using a rescue disk I can see that ...
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1answer
8k views

CentOS 6 not registering new hostname on Windows Server 2003

I rebuilt a Windows 7 Workstation with CentOS 6.5. The Windows 7 had a host name aaa attached to domain ddd.local. The new CentOS hostname is bbb. When I try to ping it: $ ping bbb ping: unknown ...
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3answers
32k views

Fix “firefox is already running” issue in Linux

I am trying to open Firefox in CentOS, but I'm getting the following message: Firefox is already running but is not responding and Firefox doesn't open. I tried this in command line: kill ...
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1answer
4k views

How can I see settings of the email server?

I have root access to a Linux server (CentOS 5.10). I want to see the email server's settings such as whether SMPT is working, wheter there is an email server, port number, does it require SSL, what ...
2
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1answer
5k views

php5.6.2 installation with httpd24 ( apache version 2.4.10 ) on centos/rhel

using this repo : http://dl.iuscommunity.org/pub/ius/stable/CentOS/6/x86_64/ius-release-1.0-13.ius.centos6.noarch.rpm for php installation , and for apache i am using amazon linux repo current ...
2
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3answers
1k views

installing eric5 in CentOS 6.4

I am trying to install Eric Python IDE 5 in my CentOS 6.4. The problem here is even I have installed PyQT4 its again saying that module is missing. what I am supposed to do ? here is the terminal log ...
0
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1answer
125 views

Centos 7 - where is jfx library for openjdk8?

I have centos 7.1. And I installed openjdk8 and openjdk-devel8. However, when I tried to compile in netbeans my jfx application I get package javafx.* does not exist. After some investigation I see ...
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0answers
66 views

CentOS 7 blurry, fuzzy screen

I just installed CentOS 7 to Dell Optiplex 780 and I have problem with display. I am using two screens and they are quite blurry, fuzzy. You can see the problem (look at the terminal) - ...
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2answers
5k views

why can't this CentOS 7 server see wifi connections?

I recently installed CentOS 7 as the sole OS on an Acer Aspire T. There is no GUI, as it is a server with a terminal-only interface. What do I need to do to get CentOS 7 to be able to see and list ...
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1answer
4k views

CentOS 7 - Rename network interface without rebooting

I'm renaming network interfaces by modifying the files in /etc/sysconfig/network-scripts. eth0 -> nic0 eth1 -> nic1 The content of the network scripts looks like this, after modification: # cat ...
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4answers
77 views

Command not Found in centos 6

i am new to linux and learning it . while installing gambas application i face problem .. sudo add-apt-repository ppa:gambas-team/gambas-daily sudo apt-get update sudo apt-get install gambas3 ...
3
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2answers
91 views

No /dev/mmcblk0 during boot

I am trying to install CentOS-6 on an eMMC drive. Since the supported 2.6.xx kernel from CentOS-6 doesn't support mmc, I compiled a newer kernel (4.2.6) which has updated mmc drivers. I tried booting ...
0
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3answers
42 views

What is the opposite of yum provides?

yum provides <command> tells you what package provides, for instance, /usr/bin/python. But how do I find out what commands are provided by a certain package?
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8answers
14k views

CentOS 6.5 installation hangs on first screen

I'm trying to install CentOS 6.5 in Virtual Box. The problem is, the installation hangs on the first screen after waiting about 10 seconds. How can I pass this screen? The steps I installed: 1) ...
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0answers
34 views

PHP app crashes: child pid exits with Illegal instruction (4)

I have a CentOS 6 server with Apache and PHP. I run some application and can constantly reproduce this crash. After some sequential action the app dies and the only trace I found is the following ...
0
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1answer
152 views

php 7 install throws “Cannot load Zend OPcache - it was already loaded” error

I am using salt to provision my servers, and I just tried to upgrade to php 7 and although everything is installing correctly, anytime I run php -v or run any php anything it throw this at the head of ...
2
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1answer
2k views

Bridge does not get IP via DHCP at boot

I'm running CentOS 7. I'm not running NetworkManager, and I've actually uninstalled it. My system is supposed to acquire an IPv4 address via DHCP on br0 at boot. Howver, when I log in, it has no ...
9
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3answers
14k views

How to install packages to a custom location in centos6

I have a shared location, let me call it /tp I want to install all my libraries and packages in this location just like the default install. Reason to do this is: I want all the users in the network ...
3
votes
1answer
79 views

Wget and curl can work normally, but ping fails

When I ping www.google.com and 8.8.8.8, I get no reply: # ping www.google.com PING www.google.com (216.58.221.228) 56(84) bytes of data. ( no response) # ping 8.8.8.8 PING 8.8.8.8 (8.8.8.8) 56(84) ...
2
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1answer
712 views

can't connect to samba drive in centos 6.3

#smbclient //ballzdeep/torrents Server not using user level security and no password supplied tree connect failed: NT_STATUS_BAD_NETWORK_NAME Does this mean i need to require username and password ...
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0answers
15 views

Centos 7 i686 Log entries

It appears that my system has a built in bootable recovery image that appears when it doesn't boot to windows and it presents it self as a SMI USB drive. Linux is picking this up as SDE which doesn't ...
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0answers
53 views

Installing qemu-kvm 2.5 on Centos 7

Are there any repos out there that carry the most up-to-date version of qemu-kvm as well as dependencies? I ask because the newest qemu-system has a HUGE list of dependencies and I would like to not ...
2
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1answer
33 views

Is it possible to have a daemon run a process as another user WITHOUT having a superuser daemon?

I'm working on a project at the moment where I have a daemon that needs to run a process as another user. I would like the daemon to not run as root if possible. However, i'm struggling to figure out ...
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32 views

TLSv1.2 support in CentOS 5.8

Right now I can't access HTTPS site from PhantomJS headless WebKit browser because of TLSv1.2 In my CentOS 5.8 I have following OpenSSL 0.9.8e-fips-rhel5 01 Jul 2008 verison installed. I think I ...
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0answers
18 views

Detect ad blockers add-ons/extension on CentOS 5.8 [closed]

In continue to this question http://stackoverflow.com/questions/34567812/phantomjs-centos-5-8-unable-to-render-the-page/34587524#34587524 I'd like to detect any ad blockers add-ons/extension installed ...
1
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1answer
2k views

Vagrant 1.7.*. is not supporting supporting virtualbox 5.x?

I have installed virtual box-5.0.2r102096. Previously I have virtual box 4.3.*. Vagrant version is Vagrant 1.7.2 but it was giving me following type error when I do vagrant up Failed to mount ...
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0answers
27 views

Why can't I install CentOS 7 in dual bot wth Winows 8.1?

I'm getting crazy with this OS :'( I want immediately say that I'm sorry for my English, I hope I can explain myself well. Please let me just explain few things: I need to build something under ...
1
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2answers
86 views

Centos 7 - ssh-keygen is not generating keys

sshd service doesn't start due to missing keys. When I try to generate the keys using ssh-keygen -t dsa I just get message saying: Generating public/private dsa key pair. I don't get prompt to ...
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2answers
874 views

install opencv-2.4-9 on centos 6.5 with cuda 5.5 support

I can't seem to install opencv 2.4.9 on centos 6.5 with cuda 5.5 support. This is my cmake output: [root@cadejos-0 opencv]# cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/opt/opencv -D ...