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

learn more… | top users | synonyms (2)

2
votes
0answers
399 views

Nagios not running notify command

I am in the process of creating a notify command for our Nagios server to notify us via our Kannel SMS sender. This is what I got so far: /usr/local/bin/curl -v -G -d 'username=user' -d ...
2
votes
0answers
484 views

Odd Inode/Ram cache drops happening in CentOS

I run a CentOS 5.7 machine (64bit) with 24GB ram and 4x SAS drives in RAID10 setup. This machine runs nginx/1.0.10, php-fpm & xcache. About a month back the RAM usage of this machine has changed. ...
2
votes
0answers
546 views

Redmine install on CentOS

I'm trying to install Redmine on CentOS 5 following the instructions on the Redmine wiki. I've gotten to the "Configure Apache to host the documents" step without errors. That links to another ...
2
votes
0answers
720 views

How can I tell if no_root_squash is enabled from an NFS client without mounting the share?

Obviously, I can look at /etc/exports on the NFS server-side to see if no_root_squash is enabled, but is there a way I can check this from the NFS client-side without actually mounting the share? ...
2
votes
0answers
179 views

How do I install dvd-slideshow on Centos 5?

How do I install dvd-slideshow on Centos 5? http://dvd-slideshow.sourceforge.net/wiki/Main_Page I tried but only found a gui to install on Ubuntu. I'm using Centos 5, command line.
2
votes
0answers
599 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
0answers
13 views

How can I figure out why an HID unikey device is not being recognized by the software needing it?

I have a custom built CentOS machine. For those of you who know Vagrant, the image is at https://atlas.hashicorp.com/puppetlabs/boxes/centos-7.2-64-puppet. When I connect an HID Unikey device to this ...
1
vote
0answers
25 views

CentOS 6 - Order of network interfaces when running “ip address show” command

I have installed CentOS 6.7 on new HP Gen9 server and decided to rename interfaces using udev so they are in order eth0-7 from left to right when looking at servers back (originally interfaces were in ...
1
vote
0answers
38 views

sssd realm discover: Not authorized to perform this action

I am testing sssd on CentOS and am unable to progress as per the error below: [root@sssd-testing ~]# realm discover realm: Couldn't discover realms: Not authorized to perform this action ...
1
vote
0answers
25 views

Screen wont work once monitor is disconnected

I have a JetWay PC (JBC375F3AW) running CentOS7. When it boots up everything works OK. If I remove the cable going to the DVI port and re-connect it, it wont work. The same goes if I boot the box ...
1
vote
0answers
20 views

How do I get a certificate on a server from a certificate authority server using an OpenSSL request?

How do I get a successful request for a certificate from one Linux server to a Linux server that is a certificate authority? I'm using Centos 7 on both servers on the network. I'm using an OpenSSL ...
1
vote
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 ...
1
vote
0answers
27 views

Identifying disk drives during RHEL/CentOS/Fedora Installation

What steps are followed in order to identify a connected disk drive during Linux installation ? I am interested RHEL/CentOS/Fedora procedures. Is it entirely depends on the Kernel package and drivers ...
1
vote
0answers
34 views

problem while using “ yum groups ”

When i am trying to use yum groups commands in RHEL 7 it is giving me following output. #yum groups list There is no installed groups file. Maybe run: yum groups mark convert (see man yum) I have ...
1
vote
0answers
58 views

Create CentOS-7.1 custom iso with upgraded kernel-4.2.6

I am trying to create CentOS-7.1 custom iso with kernel-4.2.6. But I am facing issues while installation. Please see attached image for details. I have followed below steps to prepare custom iso ...
1
vote
0answers
35 views

VMWare Centos 7 partition Bad magic number error

I've inherited a VM image so not 100% sure how initial disks were set up. I've attempted to extend my image by 10Gb following some basic instructions & adding a partition but can't seem to commit ...
1
vote
0answers
23 views

Samba Share to Require Password Debugging

I've recently set up Samba on one of my CentOS 7 servers and it works fine, it allows anyone to access it as long as they are on the LAN. Now I need to set up a second share that can only be accessed ...
1
vote
0answers
60 views

CentOs 7 - MobaXterm - X11 Forwarding per user

I am using MobaXTerm to connect to my CentOs 7 Server. I have set X11Forwarding yes in my /etc/ssh/sshd_config file. The root user is able to start the X11-Gui for example gedit. The other users ...
1
vote
0answers
44 views

apache server-status 403 forbidden azure centos vm

I get 403 forbidden for http://testapache.cloudapp.net/server-status. Below are the following exact steps I have followed. I created a new centos vm. Then ran yum install httpd Opened ...
1
vote
0answers
58 views

CentOS 7 system wide display configuration

I have two displays, one connected via DVI and one via HDMI. I installed CentOS 7, which thinks (like every linux I've tried so far), that the one connected via DVI is the primary display and it's on ...
1
vote
0answers
30 views

Empty output file in systemd unit file

I created the below systemd unit file (Centos 7) to run KMS server and logs the client requests to the kms-server.txt file. The service runs without any problem and responses to the client's requests ...
1
vote
0answers
10 views

Networking issues after XEN guest migration

Yesterday, after mirgation of my CentOS 5.3 VPS from ISP to my own local XEN, I was a little bit complicated: after changing all network settings inside: /etc/sysconfig/network-scripts/ifcfg-eth0 ...
1
vote
0answers
15 views

Dovecot… shadow - uknown user… how do I fix this

For one user in particular I have this maillog error and the user is unable to send files using SMTP WLMX002 dovecot[1402]: auth-worker(49961): shadow(user@domain.com,X.X.X.X): unknown user How do ...
1
vote
0answers
56 views

UPDATED:Replace Firewalld with system-config-firewall-tui on CentOS 7

Hey All I have a question regarding firewall config on CentOS 7. What I have done Disabled firewalld with systemctl stop firewalld.service Installed and configured system-config-firewall-tui ...
1
vote
0answers
13 views

FTP Server Allowing Public FTP Users When Are Restricted

I'm configuring FTP on a Centos 6.5 Machine, First I disabled Firewall & SELinux on Machine With Relevant Commands. Then installed FTP Via Yum, enabled service on boot & in running session ...
1
vote
0answers
41 views

CentOS not booting up after showing 5 ducks

I have been trying to install CentOS on my system for couples of days, without any success. After creating a flash drive with OS and and trying to install OS from this, it only shows 5 ducks and ...
1
vote
0answers
63 views

NFS Share on Centos 7 Fails to automount

I have a fresh install of Centos 7. I cannot seem to auto mount an NFS share located on 192.168.254.105:/srv/nfsshare from the Centos client. Mounting the share manually however, works perfectly. ...
1
vote
0answers
48 views

Install wireless usb on CentOS 7 (VMWare)

I am very new to Linux. I have installed CentOS 7 on a virtual machine using a windows host. I am wanting to install my USB wifi dongle so it can be used on the CentOS 7 guest. (My windows does not ...
1
vote
0answers
69 views

Postfix cannot start but dovecot is ok

My postfix service cannot start. Here is message: Job for postfix.service failed. See 'systemctl status postfix.service' and 'journalctl -xn' for details. And here is service status: ...
1
vote
0answers
74 views

Mysql 100% 1 core CPU load

I have 8 cpu in server, and Mysql works only on 1 cpu core on 100%. How can I use all cores? my my.cnf [mysqld] safe-show-database query_cache_limit=1M query_cache_size=64M ## 32MB for every 1GB ...
1
vote
0answers
38 views

Apache SSL timeout is not matching settings

I have a CentOS 6.7 apache Server version: Apache/2.4.7 (Unix) server with both http and https ports configured. They are configured the same, except for the SSL specific settings. The most relevant ...
1
vote
0answers
17 views

Remove permanent redirect and clean DNS

I am experiencing "Server not found" errors since I did the following, in my server I had this domain structure: example.com -> permanent redirection to app.example.com app.example.com I removed ...
1
vote
0answers
53 views

How do I install driver for the Linksys WUSB6300 in CentOS

I want to install the WUSB6300 driver in CentOS. I found good information for Ubuntu here: driver for WUSB6300 in Ubuntu However that did not get me anywhere since the C code did not compile in ...
1
vote
0answers
19 views

Linux networking in VM ware

I have a doubt in Linux networking in VM ware. I have VM ware and i installed three Cent OS in them. I would like to network them all in a local LAN in VM ware itself. One among these three VM ...
1
vote
0answers
41 views

httpd and mysqld used out of memory

I choose 512mb ram for my Centos VPS with very low traffic new website .but after 2,3 hours after rebooting, i have only 24mb free memory. when i use top command: 2981 root 20 0 37176 10m ...
1
vote
0answers
62 views

CentOS server can't be reached from local net after no active request to outer net for some time

I'm setting Wake-On-Lan of my CentOS server so that it can be wake up through Internet. I set a static ip address on my server, preserve the ip address on the router and create a static ARP entry of ...
1
vote
0answers
75 views

How to configure pam.d config files in CentOS

I am hardening a CentOS 6.7 VM to CIS standards. https://benchmarks.cisecurity.org/tools2/linux/CIS_CentOS_Linux_6_Benchmark_v1.1.0.pdf The above is the document I am using to harden the image. I am ...
1
vote
0answers
22 views

cups: connection timed out

Per title I'm showing connection timed out in the /var/log/cups/error_log. D [29/Oct/2015:17:43:32 -0400] cupsdSetBusyState: Printing jobs D [29/Oct/2015:17:44:04 -0400] [Job 11441] Connection ...
1
vote
0answers
32 views

Linux/CentOS - can't su after changing ownership

I mistakenly changed ownership of all files on a CentOS system from root to my login account. I can login but if I su I get: su: cannot set groups: Operation not permitted I don't need the system ...
1
vote
0answers
48 views

CentOS Running process not responding to kill signals and not context switched

An updatedb process on my linux server is not responding to kill signals. (kill -9 or SIGSTOP) [root@chroot-1 ~]# ps auwx | grep -i 4505 root 4505 99.5 0.0 59544 1256 ? RN 09:43 ...
1
vote
0answers
111 views

CentOS 7 - Forcing a disk to be /dev/sda

I've been wrestling with this problem for awhile now, and I've hit a wall and need help. In my system, I have 1 drive connected to a SATA port, an SSD. CentOS 7 is installed to this disk. Also in ...
1
vote
0answers
14 views

Set Compose Key on Centos 7 Desktop

How can I set the Compose Key on a CentOS 7 desktop environment? All of the documentation I've found for other systems says: System > Preferences > Keyboard Select the Layouts tab Click on Layout ...
1
vote
0answers
118 views

gmail Internal parse error: Illegal envelope To: address (invalid domain name): root@[1.2.3.4]

Sending e-mails to my own gmail account from a server without a domain name. When using internal hostname basinsrv.localdomain, cannot reply. Tried these non-default settings in main.cf: myorigin ...
1
vote
0answers
51 views

Why is denyhosts not banning *some* brute force root SSH login attempts?

I recently noticed in my logwatch emails from a couple of servers that although denyhosts was doing its job for some brute force root ssh login attempts others seem to be ignored and continue to ...
1
vote
0answers
13 views

Unable to update CentOS6.6 due to 404

For a long while I've had a scheduled call of 'yum upgrade' to keep my VPS healthy. Recently the update fails because no repositories can be found from the various mirrors. ...
1
vote
0answers
22 views

Restoring VG configuration from recovered drive

Had to reinstall CentOS on a server with three RAID 1 arrays. I installed the OS on sda (300g), and left sdb and sdc alone (they were not formatted or otherwise fiddled with). The OS is up but ...
1
vote
0answers
1k views

Why can't nmtui see wlp3s0 on minimal CentOS 7 installation?

In a recent installation of a minimal version of CentOS 7 (terminal only, no GUI), typing iwconfig results in the terminal showing a wlp3s0 connection, as follows: [root@localhost ...
1
vote
0answers
56 views

How to recover an Intel RAID 0 on a Rocks cluster distribution

We had a Rocks 5.5 distribution on our cluster and wanted to upgrade to 6.2. The "/export" partition was mounted on a Intel software RAID 0 array of 2 identical hard drives (HD) (/dev/sdb and ...
1
vote
0answers
39 views

Linux PAM: add specific lib to Makefile and compile a single module

I am dealing with the development of a custom PAM module for a CentOS7 system. As starting point, I'd like to use the project linux-pam, specifically: compiling only the pam_permit module; adding as ...
1
vote
0answers
704 views

Bash session errors on commands: “fork: Cannot allocate memory”

I have a bash session open to a remote server and something is wrong. I created a directory "test" and touched the files inside touch 1 2 3 4 5. I then tried to copy the directory cp test/ test2/ and ...