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

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CentOS: Avoid that ALT-F4 switches to console

At least every Linux system that I worked with used the convention to switch to the non-graphical consoles by Ctrl-Alt-F1, Ctrl-Alt-F2 and so on. Recently, I installed CentOS 6.3 on a machine. The ...
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122 views

Cent OS 6.3: How to make places show up folders in tabbed versions (or at least not in a new window)

I moved to CentOS 6.3 recently. The places application shows folders but each folder is shown in a new window. So if I go to 2 different folders and go deep in 3 sub folders, I will have six windows ...
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1answer
602 views

Is the maximinm value of network.http.pipelining.maxrequests still 8?

I've detected some slowness in Firefox 17 under Fedora 18, so I decided to modify some configuration options. So, the question is: Does someone know if the maximum value of ...
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1answer
5k views

How do I configure the network interfaces persistently in CentOS so it will survive a reboot?

I configured a network interface with the following commands: ifconfig eth0 up ip addr add 192.168.9.1/28 dev eth0 route add default gw 192.168.0.1 This works. However, when I reboot the machine I ...
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242 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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2answers
3k views

How to install emacs using YUM without X11 libraries?

I have installed a minimal installation of CentOS 6.3 inside a VirtualBox VM. Now, I would like to install Emacs for use from the command line only. When I do a search for emacs using yum search ...
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4answers
5k views

CPU monitoring tool for Centos

I'm looking for a CPU monitoring tool that could monitor the different processors in my machine, and also has a GUI (similar to the Ubuntu monitoring tool). Is there anything like that in Centos?
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483 views

How to edit rpm's HEADER and NAME-VERSION-RELEASE

Is there's a way or a tool that can modify the HEADER and the NAME-VERSION-RELEASE for an existing rpm without installing/rebuilding it?
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152 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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0answers
900 views

Running gnome-keyring-daemon in CentOS?

I successfully installed MySQL Workbench in Centos 6.2. When I run MySQL Workbench and try to store a password by clicking "Store in Keychain", I get the following error: Could not store password: ...
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2answers
10k views

Error on application install: /lib/ld-linux.so.2: bad ELF interpreter: No such file or directory

When I executed a command to install an application, the following error occurred /lib/ld-linux.so.2: bad ELF interpreter: No such file or directory I was not aware on how to fix this problem. I ...
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5answers
5k views

CentOS | [root@hostname] does not show anymore?

For some reason I logged into my CentOS6 server and at the beginning of every line it normally shows [root@hostname]# Now it shows -bash-4.1# What does this mean? And how to I get it back to ...
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2answers
1k views

fix the virtualbox centos after vdi resizing or expand a LV group

I successfully resized my centos vdi in virtualbox with command VboxManage.exe modifyhd Centos.vdi --resize 12000 But when i started Centos i got error messages that gnome power manager not been ...
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1answer
202 views

What to do if Cacti monitering server goes down in Centos 6.3?

I have successfully deployed cacti with plugins thold, nectar, realtime. Currently I am monitering my amazon ec2 servers and internal servers in my organization. but I afraid what to do In following ...
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3answers
832 views

recreate mysqld file centos

I have tried installing mysql several times but keep getting this error: mysqld: unrecognized service I've tried: yum remove mysql-server yum remove mysql yum remove MySQL-* then yum install ...
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1answer
1k views

Remove noexec from Home folder

I trying to deploy an rails application into /home/app/myapp, but when application tries to connect to Mysql, I get this error: ** [out :: 192.168.110.50] ...
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1answer
693 views

How to add a GUI to a minimal install of CentOS?

I did a minimal install of CentOS 6.3 and now want to add a GUI. I tried using yum to install a GUI, but it is unable to resolve the CentOS repository server mirror.centos.org. I tried to install ...
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2answers
797 views

Get list of top 10 memory consuming processes with graph using Cacti in Centos 6.3

I'm using Cacti in Centos 6.3 and I would like to get the list of the top 10 memory consuming processes, with a memory graph, so that if server fails I can easily find the processes behind that. It ...
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2answers
635 views

Huawei E303 internet key with Linux CentOS?

Are there any programmes, downloads, patches, drivers available to use a Huawei E303 Internet Key in CentOS?
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1answer
149 views

Accounts attacked

I have run two commands below. I find some of the accounts attack as below. I do not have the account test,teste,oracle and admin in my home directory. As there system account. How to know which are ...
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2answers
242 views

Unable to install rbenv with deployer user in CentOS - Permission denied

I created a new user in CentOS 6.3 using this commands useradd deployer passwd deployer visudo then I added this line to file: deployer ALL=(ALL) ALL Fine! Now I trying to install rbenv, to ...
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1answer
482 views

How to compile tmux 1.7 on CentOS 5.8?

I would like to have tmux 1.7 on my machine with CentOS 5.8 (64 bit). It requires libevent in version at least 1.4.14b or 2.0.20 and the latest version in yum packages for CentOS 5.8 is 1.4.13 . I ...
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2answers
4k views

SVN server with remote GUI administration

I have 2 Linux servers. One is Centos 5.5 another is Centos 6. I want to install SVN server on both server separately. Can anyone tell me which svn server has a good remote administration GUI. Also ...
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1answer
628 views

how to solve postfix errors?

After following several tutorials on setting up postfix at basic level on CentOs for my VPS, continue to get the following: -bash-4.1# postfix start /usr/libexec/postfix/postfix-script: line 317: ...
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1answer
125 views

Where can I find mailfromd RPM's for CentOS 6?

I have been trying to locate an RPM for GNU Mailfromd and it's dependencies and have been quite surprised to find it absolutely nowhere on the 'net. Only place I could find any RPM's were for ...
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4answers
1k views

umask is not working for directories

I have an odd problem with umask. My current setting is: $ umask 0022 $ umask -S u=rwx,g=rx,o=rx This only works for files though and not directories: $ touch abc $ ll abc 0 -rw-rw-rw- 1 user1 ...
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1answer
167 views

CentOS: disable a non-reachable repository

How to disable a non-reachable repository? I have an error when I use yum repolist or yum list: # yum list | grep 404 http://download.opensuse.org/repositories/home%3A/SannisDev/ CentOS_CentOS- ...
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1answer
7k views

enable apache mod rewrites to load clean-urls

In CentOS, a2enmod rewrite results in “command not found” but httpd -M lists rewrite module as listed and shared. I'm trying to enable it so can then have these rewrite rule apply so I can switch back ...
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2answers
1k views

Disable SELinux in apache to stop warning

I keep getting this error when I restart httpd: DocumentRoot does not exist What else can I do besides disable editing /etc/sysconfig/selinux to fix it?
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4answers
7k views

HTTPd shows PHP code instead of executing it

My setup: # grep php /etc/httpd/conf/httpd.conf LoadModule php5_module modules/libphp5.so AddType x-httpd-php .php AddHandler php5-script .php # grep PHP /etc/httpd/conf/httpd.conf PHPIniDir ...
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1answer
115 views

mouse in midnight commander works only under root

I posted a question a little time ago about mouse that doesn't work with terminal, and then I remarked that mouse works fine, but only under root. Can I change this behavior? It seems i need to ...
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3answers
4k views

Slow start of Midnight Commander on CentOS

Is there any way to prevent mc from taking 10-30 seconds to open? Never seen this with Debian.
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1answer
604 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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2answers
2k views

Centos 6.3 can't resolve hostname of network drive while others can

I have a network drive (external network) being used as media storage for a media server running on my router. I'm trying to switch the media server to my Centos 6.3 machine so I can take advantage of ...
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1answer
629 views

how come has firebird-superserver stopped and how to prevent from happening again?

On a CentOS 6.2 x86_64 server I have an instance of Firebird 2.5 that suddenly stopped working. The last part of the /var/log/firebird/firebird.log is: cpc-5556l (Server) Fri Nov 30 10:12:03 ...
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300 views

How to stop mail with PHP error messages to root?

Today, my Centos has a problem. When I type df -h in SSH I get: /dev/vzfs 61G 61G 0.3G 99% / The disk is full. I found that /var/spool/mail/root is nearly 53GB. tail /var/spool/mail/root -n 50 ...
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1answer
328 views

Firewall/routing rule in Centos for this setup

I have two ethernet interfaces, namely eth0 and eth1. I want to implement an advanced routing rule but I am totally new to firewall/routing rules in CentOS. Here is what I am trying to do: Both my ...
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2answers
1k views

What is the process `sendmail`?

When I type top commond, I see many sendmail, what are these sendmail? I never set mail in my service. SER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 16110 root 17 0 234m 35m ...
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92 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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2answers
2k views

SSH connection refused

I have a CentOS Linux server with a SSH connection. It works perfectly but from time to time, the server refuses the connection. If I reboot the server, I can SSH again. What could be wrong?
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2answers
199 views

Hot partition CentOS 6 and add boot pick?

I have an existing CentOS 6 installation working wonderfully and its owner now wants to add a separate Debian installation onto the same machine. He only accesses this host via the command line and ...
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2answers
3k views

Fatal error: Class 'HttpRequest' not found

Whilst trying to make this request I have this error. I have tried to run "sudo pecl install pecl_http" but always fails. Could not find curl/curl.h After I have tired(yum instead of apt-get ...
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1answer
283 views

SELinux - CentOSx86_64: User command limitation

SELinux - CentOSx86_64: User command limitation Is SELinux the right tool for this job? If so, what is the best way to do it? I would like to limit a particular user to only running some list of ...
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3answers
2k views

Combining Centos 6 ISO images

I was wondering if I can create a single ISO image by cating two DVD ISO images together. I have heard that this only works if the ISO is split into different parts and not two distinct ISO images, ...
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1answer
707 views

Problem with path MTU discovery over pppd

I'm having an issue with pppd doing PPPoE on CentOS 6.3. The CentOS system is a dedicated router/gateway which performs NAT (both directions) and various packet filtering. It has separate NICs for ...
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1answer
2k views

Global /etc/profile setenv or export overwriting user settings in .profile

I need to call a modified version of a program in /home/user_name/bin rather than the (older) version in /opt/program_name/current on a CentOS 5.3 cluster. The program creates a tcsh script using ...
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2answers
2k views

How can I disable TCP/IP for an Ethernet adapter?

I have CentOS 6.3 running in a (virtual) machine with two Ethernet adapters. I have eth0 connected to a TCP/IP LAN and eth1 connected to a DSL modem. The system is intended as a dedicated ...
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2answers
10k views

How do I copy a symbolic link?

I have a symbolic link to a file in one directory. I would like to have that same link in another directory. How do I copy a symbolic link? I tried to cp the symbolic link but this copies the file ...
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377 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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2answers
12k views

In CentOS, what is the difference between yum update and yum upgrade?

What is the difference between yum update and yum upgrade, and when should I use one over the other?