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

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43 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 ...
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2answers
93 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 ...
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25 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
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1answer
72 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 ...
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0answers
28 views

Automatically creating windows shares when logging on to CentOS7

I am in charge of researching the suitability of deploying CentOS 6 or 7 to around 200-400 macs in a triple boot (OSX,Win7,CentOS 6or7) configuration. We currently dual boot Win7 & OSX using ...
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1answer
102 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 ...
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0answers
145 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 ...
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1answer
180 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 ...
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1answer
76 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 ...
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0answers
15 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, ...
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0answers
44 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
29 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, ...
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1answer
122 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... ....... ...
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1answer
107 views

SSL-encrypted proxy server for war files in CentOS 7

How can I configure a CentOS 7 web server to serve only SSL-encrypted content from war files, with tomcat running behind a proxy server? I imagine this involves using firewalld, https, and tomcat. ...
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0answers
18 views

Unable to Install and Configure Apache Wave on CentOS

I have been going about this for a few hours now and I am stuck at this point. I am installing Wave on CentOS per the instructions found Here. I get to the point where I use ant to grab the third ...
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0answers
166 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) ...
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0answers
48 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 ...
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2answers
364 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: ...
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0answers
141 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 ...
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1answer
47 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 ...
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0answers
53 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 ...
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1answer
157 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 ...
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1answer
97 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 ...
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1answer
187 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: ...
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1answer
58 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: ...
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0answers
112 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 ...
2
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1answer
717 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 ...
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2answers
26 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
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1answer
69 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) ...
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0answers
117 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 ...
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1answer
70 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 ...
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1answer
84 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 ...
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0answers
131 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
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1answer
70 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"). ...
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1answer
62 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 ...
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0answers
64 views

Install Xmind on Centos 7

i try to install Xmind on Centos 7, i try with: 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 ...
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0answers
67 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 ...
1
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1answer
117 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 ...
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1answer
20 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: ...
2
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3answers
128 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 ...
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1answer
99 views
+50

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 ...
3
votes
1answer
316 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 ...
1
vote
1answer
63 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 ...
1
vote
1answer
191 views

log files in CentOS 7 [closed]

In CentOS 7, how can I locate and view all the system logs that tell me who tried to enter the system, who got in, what processes they contacted, what they accomplished, etc. I want to be able to ...
0
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1answer
23 views

toggling between output and command prompt in CentOS terminal

When I open the terminal in CentOS linux and use su - to work as the root user, I type in commands like journalctl that result in a lot of output. The problem is, when I am done scrolling through the ...
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3answers
637 views

Does CentOS 7 incorrectly sort kernel menu entries in grub.cfg?

I've noticed an unexpected ordering of grub menu entries on a CentOS 7 system: It has following kernels installed: $ ls /boot/vmlinuz* -ltr Jun 30 14:17 /boot/vmlinuz-3.10.0-123.el7.x86_64 Nov 6 ...
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2answers
314 views

httpd error: Address already in use: AH00072

I have a server, CentOs 6.5 which were installed xampp by a friend of mine. But I thought it's best to install apache, php and mysql from yum. I have it removed simply by using this #rm -rf ...
3
votes
1answer
392 views

Windows 7 boot option missing after installing CentOS 7, how can I get it back?

After installing Centos7, windows 7 is not showing at the boot time. Centos 7 is accessible. My boot folder entries: [root@localhost boot]# ls -ltr total 89176 -rw-------. 1 root root 2840084 Jun ...
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0answers
542 views

rtl8812au wireless driver installation on Centos 7

I have a fresh install of Cent OS 7 with the Gnome desktop environment. I have been trying to install rtl8812au wireless drivers found at https://github.com/gnab/rtl8812au for my Netgear A6100 WiFi ...
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2answers
83 views

moving a file to a folder with root privileges in CentOS 7

I am reading a tutorial that wants me to place a script file called script.sh into a folder called /etc/profile.d/. However, when I try to save the script.sh file in that directory, the gedit tool ...