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

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libmwlaunchermain cannot open shared object file

I am trying to install the MATLAB Runtime (see www.mathworks.com/products/compiler/mcr) on Cent0S 7. I think I have installed MCR correctly because the install finishes through saying it completed ...
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bash cannot find mvn command after install

I tried to install Maven on CentOS 7, but afterwards typing mvn -version in the terminal results in bash: mvn: command not found.... How can I fix this so that I can call maven from the CentOS 7 ...
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12 views

CentOS 7 shell script interpretor

I am starting to write a shell script to be run in CentOS 7. Which interpreter should it call, and what should the shebang line look like? I tried this: #!/bin/sh But when I type cd /bin ...
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MySQL read only error but permissions set and SELinux AFAICT correct

I am new to MySQL and Linux and because I had issues with an old MySQL version (5.1) I used mysqldump and installed MySQL 5.6. I changed the datadir location by copying everything to the new folder ...
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44 views

Unrealistically long process times displayed in top

I (partly) manage a small cluster and we are having some problems on a few nodes (running CentOS 6.4). Some processes show exceptionally long run-times in 'top', even though the computer has been ...
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26 views

/usr/java/jre1.8.0_31/bin/java.exe: No such file or directory

I've been trying to run a plugin inside a I have hired, and I've constantly been getting this error: [04:13:41] /bin/sh: /usr/java/jre1.8.0_31/bin/java.exe: No such file or directory Not too sure ...
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10 views

centos 7 installation with customized bridge module

I have installed latest Centos 7 x64 edition in my server. I need to modify the linux-bridge module with some customized changes and use it as a default bridge module. Currently I am building centos ...
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1answer
15 views

Postfix Mail Relay Server with TLS

I currently have Postfix set up on a Centos 6 server, as a simple forwarding service. Currently in /etc/postfix/main.cf I have set the following: smtpd_client_restrictions = ...
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13 views

Centos 6.6 unrecognized services during boot rsyslogd / iscsid / iscsi / mcstrans / syslog / yum-updatesd / rhnsd

Could anyone explain what is going on here, the server used to boot fine without errors and now all of a sudden services cannot be found anymore? When researching any of these errors I get no ...
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2answers
40 views

mdadm - Can't Remove Components In RADI1

I have my /boot partition in a RAID 1 array using mdadm. This array has degraded a few times in the past, and every time I remove the physical drive, add a new one, bring the array being to normal, ...
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11 views

Fail2Ban: Sending Mails with CentOS 7 using postfix

I am seeking advise on how to get Fail2Ban installed and configured on CentOS7 using firewalld and postfix for sending reports. I am not in need and even don't want having a fully featured mail server ...
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23 views

CentOS 7: write failed: broken pipe when trying to reboot

Commands I've tried: sudo reboot sudo systemctl reboot Both commands just ask for my password for sudo then write: Write failed: Broken pipe Then they close the SSH connection and I can ...
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1answer
34 views

Installing new NVIDIA driver fails

I hope this is as easy as an already answered question I didn't find on SE. So, I have an LTSP server running CentOS 6. Linux kernel version of both LTSP image and server are the same: is ...
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1answer
34 views

`find` multiple -o -name condition AND ! -name

I'd been playing with this snippet and seems like I can't make my desired find work. I tried google but all tutorials does not seem to tackle this scenario suppose i have the following files ...
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2answers
108 views

replace `while` with more suitable function so looping would wait for each process to end

I have a bash script that look out for files recursively under multi-sub folders, then use ffmpeg to each file. at debug, it works great if i use echo ffmpeg but the thing is, at real work where it ...
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2answers
73 views

What is brandbot?

What is the "brandbot" service running in Centos 7? What does it do? All I can find (it has no manpage) is "Flexible Branding Service" and that it's part of the "base" repo.
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12 views

Centos 7 FTP Hidden Directory Issue

After setting up Centos 7 with a web server standard install and LAMP stack. I installed vsftpd. Everything works fine and configured it to accept passive to enable gui ftp programs. However, when ...
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Cannot resize windows remoting-in through X11VNC?

As title says, I am remoting on to a Linux box (CentOS 6) using X11VNC. However, I cannot resize any windows manually by hovering over the frame, because the frame resize cursor does not appear. ...
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73 views

One-Liner needed: Stop httpd if running already & Start httpd if not running

As part of a provisioning script for CentOS 7 I am in need to have a one-liner that performs the following. Unfortunately, I have no clue how to achieve that. If httpd is running then stop it If ...
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7 views

installing r8168 driver in centos 4.8

I have installed cent os 4.8 and I am not able to connect to internet from that system. After searching on the net I found that the system has r8169 driver instead of r8168. Now I am trying to ...
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12 views

SELinux context on CentOS 7

I installed CentOS 7 on my server and tried to deploy phpBB. I realized that SELinux was on when the directories were 'Unwritable'. I setenforce to 0 and completed the installation. However I'd like ...
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18 views

How to Install Oracle iPlanet Web Server on CentOS 7?

System: CentOS 7.1 64bit Programe: Oracle iPlanet Web Server 7.0.15 64bit for Linux The java related components have been installed when I use the command 'yum install java'. Such as ...
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2answers
76 views

using the variable “file” obtained from `for “file” in` and pass to another script fails [on hold]

I am trying search for all .mkv files in my current folder, then using mediainfo I want to put the height from its meta data to a variable, but it seems it is failing. This snippet: ...
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1answer
24 views

SSL by IP or domain

The server that this is for will operate in a intranet environment... I have Apache working with SSL. I am using a self-signed SSL Certificate created using the steps outlined here: ...
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5answers
437 views

How to find out if a system uses SysV, Upstart or Systemd initsystem [duplicate]

Is there a simple way to find out which initsystem is being used e.g by a recent Debian wheezy or Fedora system? I'm aware that Fedora 21 uses systemd initsystem but that is because I read that and ...
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50 views

How to avoid “yum lock” hassle?

I often encounter the "Another app is currently holding the yum lock; waiting for it to exit..." message when trying to install an app and I have to kill yum manually. How can I avoid that? Is there ...
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3answers
49 views

How make console to support chinese in CentOS 7?

How can I make the console in CentOS 7 support Chinese? I used localectl command. Following is the result: System Locale: LANG=zh_CN.UTF-8 VC Keymap: cn X11 Layout: cn The sets are for Chinese. ...
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1answer
26 views

Where is the location of console fonts in CentOS 7?

Where is the location of console fonts in CentOS 7? Please tell me if somebody knows that. Thanks!
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2answers
43 views

Unable to mount root filesystem rw with journal

Trying to understand the whole journalling setup and from what I've read and tried, it's eluding me somehow. The root filesystem is ext3. Examining it via tune2fs -l /dev/root shows that ...
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19 views

Bro-IDS CSV conversion

I have Bro-IDS currently operating under Centos 7. I need to convert the output to CSV format. The documentation that I have seen on this is not clear to me. Has anyone done this successfully? I have ...
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1answer
64 views

kvm virtual manager connection failed

I installed kvm package in the centos7 i am getting this problem how to solve this. full error is here Unable to connect to libvirt. no connection driver available for qemu:///system Libvirt URI ...
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24 views

xterm window positioning

I want a shortcut to start an xterm window with specified number of columns and rows and from the specified starting points. I have CentOS 6.6 and the xterm's version is: X.Org 6.8.99.903(253). I ...
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9 views

Error loading libQtDBus.so.4 while installing skype 4.3 in CentOS 7 64Bit

I have tried to install Skype 4.3 in CentOS 7 64Bit. But its giving library error like Requires libQtDBus.so.4. Please Suggest me how can I get rid of this problem?
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15 views

check media resolution if resolution is big ffmpeg it, if output is smaller than original delete the original else delete the output

I have my storage VPS filled with videos, and hoping I can free up some space, their resolution is pretty big so I decided to re encode them with ffmpeg to a smaller resolution, I am doing every thing ...
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41 views

CentOS 7: Can't connect wifi using wpa_supplicant

I recently got a new wireless card, specifically Intel Dual Band Wireless-AC 7260 WiFi Bluetooth Half Mini Card. Previously I had been connecting with ethernet so this machine has never been on the ...
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17 views

How to benchmark performance and ensure high-availability in a CentOS 7 cluster?

To give you a little context on my question, I'd like to mention that I am writing an essay on high performance and high availability clusters using a 2-node (I know that is not optimal, but it's what ...
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1answer
18 views

Centos 6.4 and UEFI

I have centos 6.4 64. In /boot/efi/EFI/redhat I have grub.efi file (about 251Kb). However, when I execute efibootmgr I get Fatal: Couldn't open either sysfs or procfs directories for accessing ...
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45 views

Print file name,Modified Date and Size with Header

How do I print file size, file name and modified date with header.Till now I have come up with: find . -regex '.*\.csv' -execdir stat --printf '%n,%y,%s' {} \; How to add header and do not print ...
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32 views

error: cant't find command linux when booting system

I need some help with a problem when booting. Recently I've installed CentOS 7 on my pc, previously I had debian 7 and manjaro installed. When I installed manjaro I overwrote the bootloader of debian ...
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27 views

haproxy removing mod_expires set by apache

I've haproxy server which is routing requests to different web service instance based on rules. The web service instances have apache running at port 80. Now, I'm trying to set some expiry header by ...
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1answer
36 views

RPM install add yum repository

Is it possible to add a yum repository as part of the Requires field on an RPM spec file? For instance: Requires: my_custom.repo, software.xyz (only available in my_custom.repo) If not what is the ...
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2answers
27 views

How can I bring up up a non-boot (ONBOOT=no) network interface with iproute2?

Have a network interface that does not come up on boot-up: [belminf@tito ~]$ grep ONBOOT /etc/sysconfig/network-scripts/ifcfg-enp0s3 ONBOOT=no I know I could do the following for DHCP: ...
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43 views

Can't access Apache test page in desktop browser?

I've installed Apache on CentOS 7 (virtual machine) and haven't touched any of the current settings. I've started Apache and made sure I was connected to a network. Using the elinks browser, I'm able ...
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2answers
198 views

Is it ok to install CentOS rpm in fedora?

I want to try gitlab community edition in my fedora laptop. From the downloads page, it has binary packages for Ubuntu and CentOS 6 and CentOS 7. Which one should I be installing in fedora(release 21) ...
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34 views

Can I mount a case-insensitive tmpfs/ramfs?

I would like to utilize the performance of tmpfs/ramfs for some file operations, but the programs/processes that use these files assume a case-insensitive file system. I cannot find any documentation ...
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1answer
22 views

Clustered NFS server reply ERR 24: Auth Bogus Credentials (seal broken)

I have 4 servers on the VirtualBox. Two of the servers are a CentOS 7 cluster with Pacemaker(corosync), and they have an NFSv4 server in Active/Passive mode. There are also 2 clients with CentOS 6, ...
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27 views

Are there any drawbacks to running a GUI on a CentOS server?

I need to build several CentOS 6.6 servers, mostly into web servers and a couple of mail servers. Are there any disadvantages to running a GUI environment as opposed to having no X11 at all? I'm ...
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3answers
42 views

Can system time be paused?

This may or may not be the right approach, but it's feasibility was requested of me: We have a demo server that we update from time to time in order to keep the statistical calculations up-to-date. ...
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1answer
25 views

What's the difference between `grubx64.efi`and `gcdx64.efi`

CentOS7 package grub2-efi provides two files that are very similar. -rwxr-xr-x 1 root root 1070976 Mar 26 09:27 ./boot/efi/EFI/centos/gcdx64.efi -rwxr-xr-x 1 root root 1070976 Mar 26 09:27 ...
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25 views

seeking hints for correct escaping of sed commands WITHIN yaml

I am having a hard time finding the issue why following lines of "code" break my cloud-init config. Basically I am calling a son object as part of the DigitalOcean API which has a yam format - I got ...