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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0
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1answer
182 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
10k 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 ...
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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/...
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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 ...
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0answers
8k 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
117 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
185 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
981 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
162 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
1k 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
141 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
995 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
668 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
949 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, ...
3
votes
0answers
229 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
67 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
478 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
217 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
26k 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
472 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
427 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 ...
11
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
184 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
400 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
732 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
3k 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
319 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
536 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
616 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 ...
1
vote
0answers
746 views

Install Xmind on Centos 7

I am trying to install Xmind on Centos 7. This is what I have tried: Download Xmind with deb package ar -x xmind-linux-3.31. . .-i368.deb tar xvf data.tar.gz cp -r usr/local/xmind/ /usr/local/ cp usr/...
1
vote
2answers
397 views

writing mysql output to file in CentOS 7

I am trying to run the following command from inside the mysql command line client in the CentOS terminal: SELECT Concat('TRUNCATE TABLE ',table_schema,'.',TABLE_NAME, ';') FROM ...
5
votes
2answers
11k views

How can I add an application to the Favorites section of the Applications menu in CentOS 7?

I have created a custom application entry in the applications menu for Eclipse as follows in a file /usr/share/applications/eclipse.desktop as follows [Desktop Entry] Version=1.0 Name=Eclipse Exec=...
0
votes
1answer
127 views

I moved root partition by error

I'm on a VPS with CentOS 6.5 I was trying to install ASSP so by error i did this command mv -f /* /usr/share/assp and then I can't do anything when I try something like: [/]# dir -bash: /bin/ls: ...
3
votes
4answers
2k views

Memory consumption Fail2Ban CentOS

Fail2Ban is using a huge amount of memory on my system (1.2 GB). There are several articles which describe how to reduce it. Below is an example for Debian. append the 1ulimit1 command to /etc/...
3
votes
3answers
1k views

Can't start a ZNC service

I try to start ZNC using the following command service znc start I get this error Starting znc: /usr/bin/dirname: extra operand `2>&1.pid' Try `/usr/bin/dirname --help' for more information....
3
votes
1answer
4k views

Yum says dependency “ libltdl.so.3” is required, but it's already installed?

I'm a Linux noob and have spent a few hours trying to get ImageMagick installed. I finally got an old version uninstalled, but am struggling to get the newest version installed. When I run the ...
2
votes
1answer
221 views

restricting remote vpn login to ip address in CentOS 7

I have read that OpenSSH itself does not support authentication via specific IP address. In a CentOS 7 installation on a web server, how would one configure the login so that a user would not only ...