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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2
votes
1answer
96 views

How to set up robust RAID 6?

Perhaps I'm going about this all the wrong way, but I am having chronic trouble managing a RAID6 software array in CENTOS7. The system has an internal pair of drives (2x500GB) in RAID1 which has been ...
0
votes
1answer
95 views

umask getting sets to 022 even though all necessary files are modified

umask is creating lots of problem to me . I tried following . I have commented umask set entry in /etc/profile and /etc/bashrc . There is not even single file in my home direcotry where i set umask ....
1
vote
1answer
3k views

Enable Promiscous mode in CentOS 7

How to enable promiscuous mode on network adapter. I have tried by adding PROMISC=yes in /etc/sysconfig/network-scripts/ifcfg-ensxxx but no effect even after network restart or rebooting the system.
3
votes
1answer
1k views

How to prevent tzdata updates on CentOS resetting /etc/localtime

I am using a local timezone (non-UTC) on my server. Whenever I update the tzdata via yum, the system resets /etc/localtime to the default file and I am back on UTC. While #date still shows the ...
0
votes
1answer
26 views

Different linux OS on particular hdd

Have Adaptec RAID controller. There're 4 hdds on it. Existed Centos 5.10 on: /dev/sda1 - /boot ext3 /dev/sda2 - LVM I decided to migrate to Centos 7 and installed It on: /dev/sdd1 - /boot XFS /dev/...
1
vote
1answer
322 views

ssh 3des private key encrypt and decrypt

i have converted my ssh private key with 3des encryption openssl pkcs8 -topk8 -v2 des3 -in ~/.ssh/id_rsa.old -out ~/.ssh/id_rsa how do I remove encryption and get the old key?
2
votes
1answer
153 views

CentOS 6.6 memory size and lack of GUI installer?

I just installed CentOS 6.6 on my computer using VirtualBox. My question is why when I create a virtual machine with 1024MB have a GUI but if I create a virtual machine with 512MB I do not as in the ...
3
votes
1answer
933 views

NFS Port Blocking Firewall Issue

I am a little stumped on this one and maybe I have been staring at this for too long...but I cannot get my Mac (10.10.3) machine to connect to my Oracle Linux 7 (CentOS/RH 7) server with its firewall ...
0
votes
0answers
16 views

Configure a VSFTP User to have Access to /var/www Directory Centos 7 [duplicate]

How do I go about configuring VSFTP to have access to the web root folder in my LAMP Centos 7 server? I cannot seem to have anything displayed in the var directory. Thank you!!
1
vote
1answer
199 views

Can't push git updates & run Unix commands when connecting via SSH

I have installed java 8 on my bluehost VPS. I have followed http://tecadmin.net/install-java-8-on-centos-rhel-and-fedora/ instructions . In order to add directories to PATH variable I have added ...
0
votes
1answer
92 views

Centos missing ext3.ko

Earlier I encountered this error. lv_root: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY Which may be caused by the constant power failure here in our office. I fixed it by inserting a centos 6.4 disc ...
0
votes
1answer
7k views

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 ...
1
vote
2answers
2k 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 ...
2
votes
0answers
610 views

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 ...
2
votes
1answer
93 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 ...
0
votes
2answers
232 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 ...
1
vote
1answer
364 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 = permit_mynetworks,...
9
votes
3answers
2k views

mdadm: can't remove components in RAID 1

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, ...
0
votes
0answers
237 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 re-...
1
vote
1answer
665 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 2.6.32-504....
3
votes
1answer
109 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 test-[...
2
votes
2answers
154 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 ...
7
votes
2answers
954 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.
1
vote
0answers
46 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 ...
1
vote
0answers
65 views

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. ...
1
vote
2answers
183 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 ...
3
votes
2answers
96 views

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

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: height=$(...
0
votes
2answers
115 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: http://httpd....
19
votes
5answers
25k 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 ...
2
votes
3answers
12k 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 ...
0
votes
3answers
945 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. ...
2
votes
1answer
409 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!
3
votes
2answers
177 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 '...
3
votes
2answers
7k 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 ...
1
vote
0answers
186 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 ...
0
votes
0answers
994 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 ...
0
votes
1answer
780 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 ...
0
votes
1answer
382 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 ...
1
vote
0answers
264 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 ...
0
votes
0answers
257 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 ...
1
vote
1answer
196 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 ...
1
vote
2answers
910 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: [belminf@...
0
votes
2answers
1k 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) ...
4
votes
2answers
104 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 ...
2
votes
1answer
265 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, ...
0
votes
1answer
99 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 ...
2
votes
3answers
146 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. ...
0
votes
1answer
85 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 YAML format - I got ...
1
vote
2answers
475 views

why nginx holds file descriptions of logs?

on Red Hat Enterprise Linux Server release 6.6 (Santiago) nginx version: nginx/1.0.15 I use common nginx logrotate config, logrotate works fine and nginx creates new log file like access.log or error....
1
vote
1answer
82 views

Rebooting Centos Servers configured with MYSQL Master/Slave Replication

Sometime ago we configured MYSQL replication on our main web server to another CentOS 6 server. All is working perfectly and we can see the replication is working fine. My question is how to safely ...