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.

learn more… | top users | synonyms (2)

2
votes
1answer
12k views

unable to start nginx on centos 7

service nginx start Redirecting to /bin/systemctl start nginx.service Job for nginx.service failed. See 'systemctl status nginx.service' and 'journalctl -xn' for details. [root@myvps ~]# systemctl ...
9
votes
2answers
17k views

apache won't restart after adding VirtualHost conf file, why not?

In a CentOS 7 server, I get the following error when I type sudo apachectl restart after I add an include file at the bottom of httpd.conf: Job for httpd.service failed. See 'systemctl status httpd....
0
votes
0answers
307 views

DNS/BIND configuration to resolve *.mail.*.outlook.com subdomains

I'm running BIND 9.3.3rc2 on a CentOS 5 system acting as an SMTP server. Until last week, I haven't had any problems with DNS or name resolution. The only problems I have resolving are with subdomains ...
0
votes
1answer
1k views

how to make firewall changes permanent via firewall-cmd?

I am trying to open some ports in CentOS 7. I am able to open a port with the following command: firewall-cmd --direct --add-rule ipv4 filter IN_public_allow 0 -m tcp -p tcp --dport 7199 -j ACCEPT ...
0
votes
0answers
97 views

Unable to trap “CTRL+C” within kickstart “%pre” bash script

I'm using an interactive pre-installation bash script in a CentOS-7 kickstart image. I was trying to use "trap" to catch user Ctrl+C (SIGINT) and run some code as follows: trap_ctrl_c() { #Some ...
2
votes
0answers
474 views

Making static routes persist after a reboot

I have two VLANs (default vlan and vlan 5 for voip). I have 2 interfaces, one for each VLAN. My route table looks like this right now: Destination Gateway Genmask Flags Metric ...
1
vote
1answer
897 views

Thruk installation “failed to open socket”

I am extremely confused, and Google isn't really helping. Also, I'm kind of a Linux novice. I've taken a couple of classes, but that was all about how to configure things in a basic Linux setup. I'm ...
1
vote
1answer
525 views

Will I receive critical security updates if I lock CentOS yum to a specific repo version?

We run Citrix XenServer as our virtualisation platform. Presently we're right up to date with our XenServer service packs and hotfixes i.e. we're running XenServer 6.2SP1 with the SP1015 update ...
0
votes
1answer
179 views

Checking if a mail has arrived, if not then alert

I am using fetchmail in combination with procmail for mail filtering on CentOS where my mail contains various log messages. They serve me so I could search through my mail(logs) for error strings. So ...
0
votes
1answer
9k views

CentOS 7 add new user with root privileges

I am reading this tutorial, and trying to create a new user with root privileges and then block root access via ssh in a CentOS 7 server. The problem is that the new user is blocked from doing root ...
1
vote
2answers
1k views

script to add users to otrs

I'm looking for a fast way to import customer users into otrs (ticket system) I have an export from Active Directory with: firstname lastname password email username There is a script in the otrs/...
0
votes
0answers
7k views

CentOS 7 httpd failed to make connection with backend

In a CentOS 7 server with apache httpd 2.4 set up as an ssl reverse proxy for tomcat, I am getting an error indicating that httpd is not able to connect with tomcat. How can I resolve this error so ...
0
votes
0answers
7k views

completely clean re-install of mysql on CentOS 7

I have encountered problems with a mysql installation on CentOS 7. All the data is backed up, so I just want to completely erase every remnant of mysql on the machine and then do a clean install. My ...
1
vote
1answer
1k views

centos dropbox newest version not starting

I have some issues getting dropbox to run on Centos 6.3. These issues started after I recently got a security warning to upgrade Dropbox. Before this, the older version (not sure which one exactly) ...
0
votes
0answers
115 views

Setting different path for installation in python packaging

I am new to python packaging. My Command Line Interface (CLI) named virtdc modules has to be installed in /var/lib/virtdc. virtdc is the top folder structure /var/lib/virtdc/ framework/ ...
1
vote
0answers
176 views

How to configure nginx to dynamically read folders, user accounts/domains?

I have cPanel and Apache 2.4 on my CentOS 6.6 VPS. I installed Nginx as a reverse proxy. Everything works fine. I have 2 domains on the VPS & I'm able to configure them both on nginx. The ...
4
votes
0answers
932 views

How to disable sudo related logging for successful command execution under CentOS/Fedora?

You can disable sudo related log messages via adding something like Defaults:juser !syslog to our sudoers file. That is disabling logging to syslog. But under e.g. CentOS/Fedora there is an auditd ...
1
vote
1answer
155 views

Centos 5.01 can't connect to the internet

I am trying to download USB driver for centos 5.01 but I can't connect to the internet. I have tried to set ONBOOT="yes" , NM_CONTROLLED="yes" and BOOTPROTO="dhcp" on /etc/sysconfig/network-...
1
vote
1answer
939 views

Emails not sending to one specific domain

We have a AWS server where emails are delivered to domains other than our own domain. I have confirm that I can send an email to my gmail account but I can't send to my hosted gmail account. So for ...
0
votes
2answers
2k views

Service start and Permission denied

I have a script that execute a java program, and I want to create a service to start this script at boot time. So I've created a script called run.sh. /test/run.sh #!/bin/bash java -cp myjar:/test/...
0
votes
0answers
139 views

Configuration of “Same Host Name” for my all LAN Machines under squid proxy

I am having the network model as Modem N/w Switch ISDN (Airtel) -----------> Server(Centos) [Squid] -----------------> Client Machines. ...
1
vote
1answer
945 views

/sys: cpio: chown failed - Read-only file system (Building Passenger RPM using Docker) [duplicate]

While I'm trying to build rpm using Docker for Phusion Passenger 4.0.53 (https://github.com/phusion/passenger_rpm_automation), I get the following error. Any help is most appreciated. $ ./build -p /...
1
vote
1answer
652 views

CentOS 7 Crash on boot

Getting this message attempting to boot CentOS 7 BUG: unable to handle kernel NULL pointer dereference at 000000000000009B And then a kernel panic Happens when trying to boot from the OS HDD or ...
0
votes
1answer
4k 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 ...
0
votes
2answers
3k views

error re-installing httpd on CentOS 7, how can I resolve it?

On a CentOS 7 server, I am encountering an error when trying to re-install httpd. How can I resolve this error and get httpd up and running again? Here is the first error that resulted when I ...
0
votes
1answer
904 views

removing virtualmin and webmin from remote CentOS 7 server

Webmin and Virtualmin were recently installed using rpm packages on a remote CentOS 7 server. How do I uninstall them? I have googled this, but all the results are either so old as to be obsolete ...
0
votes
1answer
36 views

suddenly no service, except ssh is accessible from wan

I recently did install the GNOME Desktop and Graphical Administration Tools package groups to my remote host, for remote desktop connection. After the installation of nearly 550 dependencies was done, ...
2
votes
0answers
212 views

Is there way to print the entered password in PAM?

We are using CentOS 6.5. We have a perl script for our automation testing. One of the script login to the user as non-root user and test "su -" command. This test case passes most of the times but ...
1
vote
1answer
63 views

Delay before new/modified file appears

I'm seeing two separate cases where there's a (random?) delay before a new or modified file appears. The first case is my Rails development environment: I modify a code file (in vim) and save it, ...
0
votes
1answer
2k views

Cabal error: Cannot run c compiled programs

I have an old version of cabal-install so I downloaded cabal-install 1.20 and When installing it errors out. Additional note: ghc 7.8.3 OS: CentOS 6.6 Error: Building network-2.4.2.3... ....... .......
1
vote
0answers
470 views

Xvfb: keyboard error

We have some GUI tests (selenium) that are run on a virtualized CentOS6.6 environment and when the Xvfb process is started, we get the following error: The XKEYBOARD keymap compiler (xkbcomp) reports:...
0
votes
0answers
209 views

web container options for war file in CentOS 7

I know that Tomcat and NginX are both able to host web applications that are defined by war files. But can httpd also host a war-file-based web application on a CentOS 7 server? If so, how would you ...
3
votes
2answers
24k views

cp: cannot stat : No such file or directory

I am getting an error when I try to copy a file from my local computer to a remote server with ssh. I get the same error whether I use cp or scp. Here is my input at the resulting error: [root@xxx....
1
vote
1answer
1k views

Install SVN 1.8 on Centos 7

I've tried installing the newest version of SVN but nothing is working. On yum there is 1.7. When downloading rpm/zip error occurs when trying to configure. Setting some additional repositories ...
1
vote
1answer
449 views

Number of open file descriptors won't change when I set them in CentOS 6.3?

uname -a Linux lab.testing.com 2.6.18-164.el5 #1 SMP Thu Sep 3 03:33:56 EDT 2009 i686 i686 i386 GNU/Linux ulimit -Hn 1024 ulimit -Sn 1024 ulimit -n 1024 I opened /etc/sysctl.conf in vi and added ...
0
votes
0answers
1k views

deploying a war file to a remote centos 7 server

If tomcat is installed in a remote centos 7 dedicated web server, and a war file is placed in the webapps folder, how would you set things up so that http requests originating all over the internet ...
0
votes
1answer
3k views

CentOS 7 Firewalld zone configuration for private web application

I have read all the man pages related to firewalld and also explored all of the files that come pre-installed in firewalld before it is configured. How can I configure the zones of the firewall to ...
1
vote
1answer
407 views

Understanding the top command high load average and high CPU idle

DirectAdmin sent me the following top output: This is an automated message notifying you that the 5 minute load average on your system is 179.99. This has exceeded the 10 threshold. One Minute -...
0
votes
1answer
1k views

php: command not found on centos

I've currently installed CentOS (6.5 version), nginx, mysql and php. I've tried to navigate to index.php in a browser, and it looks fine, but if I try to run the script via the command-line I get: ...
0
votes
1answer
1k views

How can I upgrade libxml2 package on CentOS 6?

On CentOS 6.5, when I am trying to upgrade the libxml2 package with: yum localinstall libxml2-2.9.1-99.1.src.rpm I am receiving the following output: Examining libxml2-2.9.1-99.1.src.rpm: libxml2-2....
1
vote
1answer
2k views

How to use i3 on CentOS 7 with Gnome?

I have a CentOS 7 with Gnome running on my machine. Now I want to use i3 as the window manager. I managed to install i3 but I don't know how to make CentOS 7 use i3 now. I tried to edit .xinitrc like ...
10
votes
1answer
25k views

Installing fail2ban on CentOS 7

I am using @GarethTheRed 's answer to this question to install fail2ban on a remote CentOS 7 server. I am able to complete all the steps up until tail -f /var/log/fail2ban.log, at which point I get ...
1
vote
2answers
134 views

downloading sshd logs from remote centos 7 server

When I log into a remote centos 7 server as root, I am able to see the sshd logs by typing journalctl _COMM=sshd in the terminal. But the logs are massive. How can I download all the logs into a ...
1
vote
1answer
381 views

Assp won't start

I tried to install ASSP (Anti-Spam SMTP Proxy Server),but when I try to start it I get the following: $ perl assp.pl Perl version 5.012003 (5.12.3) is at least recommended to run ASSP 2.4.3 (14313) ...
1
vote
0answers
704 views

rp_filter dropping packets in linux bridges+vlan_tagged interface + tap interfaces configuration

I've a linux bridge which has it's first interface as a eth0.123 (VLAN tagged interface) & one or more tap interfaces created by kvm. (libvirt+kvm VM) [root@compute1 ~]# brctl show bridge name ...
0
votes
1answer
2k views

viewing firewalld logs via remote login to CentOS 7 server

I have firewalld installed in a remote CentOS server. When I log into the server over the internet as root, I type the following command to access the firewalld logs: journalctl --output=json-...
0
votes
1answer
313 views

CentOS 7 VPN server

How do I set up a remote internet web server using CentOS 7 so that it is completely shielded by a VPN? Here is the use case: 1.) This means that ALL requests for ANY interaction with the web ...
0
votes
0answers
2k views

Network firewall on CentOS, host cannot be resolved?

I have a centos machine and I am trying install some dependencies using yum. When I do this I keep getting a message saying the host cannot be resolved. I was told the previous person that used the ...
0
votes
1answer
521 views

No Sendmail but ISPConfig Postfix

This is what php uses to send php mail with the php mail() function: ; For Unix only. You may supply arguments as well (default: "sendmail -t -i"). ...
0
votes
1answer
603 views

how etc/hosts file is created during Centos 4.9 installation

We have our servers running CentOS 4.9. I want to find how /etc/hosts file is created during installation. A related question here (What creates /etc/hosts (RHEL 5.5)) says that in RHEL 5 /etc/hosts ...