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

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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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118 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. ...
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1answer
728 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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1answer
540 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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1answer
3k 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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2answers
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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
679 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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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, ...
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0answers
177 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 ...
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1answer
51 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
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... ....... ...
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1answer
210 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
436 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
163 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
16k 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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1answer
760 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
349 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
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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
2k 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
346 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
895 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
925 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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1answer
1k 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 ...
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1answer
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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
91 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 ...
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1answer
307 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
588 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
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 ...
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1answer
244 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
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 ...
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1answer
425 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
519 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
545 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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266 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 ...
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1answer
5k 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
112 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: ...
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4answers
1k 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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3answers
852 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 ...
3
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1answer
3k 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
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1answer
187 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 ...
2
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1answer
8k 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 ...
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1answer
51 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
5k 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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3answers
3k 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 ...
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1answer
2k 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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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
1k 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 ...
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88 views

LAMP CentOS page/folder Outbound Inbound bandwidth monitor

I have a site, the server provide only allow 2000GB/month ($0.02/GB extra). I have monitor the bandwidth in my control panel, every day, i have about 12GB Inbound, but 100GB+ Outbound, a number very ...
2
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3answers
7k views

setting mysql root password in CentOS 7

How can I log into the mysql 5.6 command line client and reset the root password in Centos7? I read the following at this link, but it does not work: 1) sudo service mysqld stop 2) sudo service ...
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1answer
483 views

no pwm-capable sensor modules installed on MSI B75MA-P45

I am using a MSI B75MA-P45 motherboard on Centos 6 and my CPU fan is currently stuck at 100%. I can see RPM of the fan and temperature inside my BIOS however when I run sensors-detect I only see CPU ...