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Questions tagged [centos]

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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19 views

Why is BIND DNS zone transfer update not displaying on terminal screen but showing in logs as up to date?

I have configured a master/Slave zone, the zone transfer happens but does not display on the terminal screen, on the terminal screen it shows notifies ONLY, but when I check the /var/log/named the ...
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1answer
26 views

Dual Network Gateway on CentOS 6.7

I have dual NIC machine running CentOS 6.7 and asterisk. First NIC is for LAN & Internet connectivity and second is for trunk provider's connectivity. Both of these have gateways configured. I don'...
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0answers
37 views

compile and use a realtime kernel on CentOS 7

I would like to compile and use a realtime kernel on CentOS 7. I found a guide on the web: http://jensd.be/589/linux/complile-and-use-a-realtime-kernel-on-centos-7-or-rhel-7 When I try to use it I ...
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1answer
29 views

DNS Slave says failed to connect: host unreachable

I have a DNS Master (192.168.102.159) and Slave (192.168.102.132) servers, both are VMs, the Master configuration is fine and does both forward and reverse lookups, however, when I try zone transfers ...
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0answers
28 views

What is the deference between `arch` and `/etc/yum/vars/arch` at docker container?

I use docker container on CentOS7 x86_64. Docker container depends on the host system. bash $ arch x86_64 The arch command shows the above host arch in the container. I want to use the container ...
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1answer
33 views

Cent OS VM not resolving DNS via nslookup ?! all zones/conf OK

I have virtual setup on NAT in VMWare with a Cent OS as a DNS Server (192.168.102.159), I ran the zone and conf test through bind named, allresults are OK, when I run nslookup from a client I get : ...
0
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1answer
23 views

Service mysqld 5.6 keeps starting and stopping on CentOS 6.9

On my VPS, mysqld starts and right after that, it automatically stops and then starts again automatically. I tried sudo service mysqld stop and it succeeded. After I started it manually and succeeded....
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2answers
32 views

kdump in CentOS 7

I wanted to migrate to CentOS 7.5 from CentOS 6.9. during installation I saw an option kdump that i could enable or disable. I wonder what is kdump and disabling it has any bad effect on server? I ...
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0answers
10 views

openstack keystone and kerberos

I have integrated the openstack and kerberos using the link provided here : https://www.jamielennox.net/blog/2015/02/12/step-by-step-kerberized-keystone/ It is successfully installed and I am able to ...
0
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1answer
67 views

Keep kernel files in different directories

Is it possible to copy standard vmlinuz-3.10..... kernel file to another directory, rename it and load it during booting the system? I'm on CentOS7 and I have a class task. "Copy vmlinuz-... and ...
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2answers
38 views

rpm -e package does not remove entry from /etc/passwd

I've been playing around with Splunk and got some questions: I have installed it using rpm -iv splunk-7.2.3-06d57c595b80-linux-2.6-x86_64.rpm I removed it next using rpm -e splunk-7.2.3-...
3
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1answer
64 views

CentOS environment: How to delete docker repository from docker hub, using linux command line

I would like to delete a docker repository from dockerhub, using the command line. I am using CentOS. Like the below is used in GUI Docker hub website to delete it (the following picture shows step)
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0answers
31 views

WiFi is disable in CentOS7

I made the installation of CentOS in VM. I was trying to connect my usb WiFi dongle(TP-Link TL WN823N) in the VM, it's sowing in the usb list but not in the adapter area. Here are the details. [...
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1answer
61 views

Unable to start ssh service on Centos Docker image

I downloaded the centos 7 docker image from docker hub. When I try to enable sshd on the server, it does not allow me to enable ssh service. Below are the steps to replicate my issue: docker pull ...
0
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1answer
83 views

How to Install or Upgrade to Kernel 4.19 in CentOS 6

# lsb_release -a LSB Version: :base-4.0-amd64:base-4.0-noarch:core-4.0-amd64:core-4.0-noarch:graphics-4.0-amd64:graphics-4.0-noarch:printing-4.0-amd64:printing-4.0-noarch Distributor ID: CentOS ...
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3answers
68 views

100% disk usage for a file system [duplicate]

I see that df reports a 100% disk usage for a file system. How can I see which folder is eating the disk space? [root@rocks7 mahmood]# df -h Filesystem Size Used Avail Use% ...
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2answers
63 views

Why /proc/meminfo shows MemAvailable under Kernel Version 3.10?

I've been using CentOS 7 and its kernel version is 3.10. To check Kernel Version, I typed 'uname -r' and command showed 3.10.0-957.1.3.el7.x86_64 As far as I know, MemAvailable metric was introduced ...
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1answer
28 views

Error in Deploying Application to Test Server?

I am having a problem to deploy my django application on a CentOS 7 test server. Initially install the miniconda, through the root profile on the server, then perform the copy of the application and ...
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0answers
91 views

Linux Centos does not boot on login GUI

I would like to boot my Linux Centos 7 on Graphic User Interface login page but it doesn't. I have already installed GNOME DESKTOP. I did: systemctl set-default graphical.target my grub file is ...
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0answers
35 views

Incorrect timestamps in cron logs on CentOS 7 VM?

I need to see accurate timestamps for the cron logs of a CentOS 7 VM using an OpenVZ-based image. The machine also has SCL enabled because Red Hat supplies antique software out-of-the box. Users like ...
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0answers
17 views

How to determine if guest OS is suspended when running as virtual machine

Running CentOS 7 and in need to do some network related commands when suspended and resumed by the VMWare. Thus far all the solutions I have seen, is connected to pm-utils. But nothing appears to ...
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1answer
12 views

Tighten existing firewalld rules

I have a current ruleset: net1 (active) target: default icmp-block-inversion: no interfaces: ens192 sources: services: http https smtp smtp-submission pop3 pop3s imap imaps ssh ports: ...
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1answer
29 views

Discover WiFi driver with Ubuntu to install on CentOS 7

I installed CentOS 7 Minimal on a Yoga Pro 2. However, I'm not able to "up" the WiFi device w1p3s0 despite following numerous guides with ip link, nmcli and nmtui. The same guides work very well when ...
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0answers
30 views

Get Package and their respective dependencies separately from 'yum update'

If I type yum update, I can get all the missing packages and their dependencies for the system. My question here is, is there a way to segregate all packages and their dependencies separately while ...
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0answers
98 views

Centos 7 Start job is running for wait for plymouth boot

Since I did the lastest update of my linux Centos 7, i have this message at the boot: A start job is running fro wait for plymouth boot screen to quit I am working with KDE desktop. I don't really ...
1
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1answer
228 views

CentOS 7.6 - yum update error “Cannot find a valid baseurl for repos: addons/7”

When I am trying to do yum update, I got the following error message. Loaded plugins: fastestmirror, langpacks Repository base is listed more than once in the configuration Repository updates is ...
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1answer
34 views

How to make files deleted from a mounted partion go to the “recycle bin” on CentOS 7

I'd like to know how can i set a mounted partition to send deleted files from main directory to the "recycle bin" on CentOS 7. They all are removed directly.
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1answer
29 views

Invoke UI from pseudo console

We have some UI test cases which we are currently invoking manually on our Linux machine (with Gnome enabled).  We login to the machine and run the below command: java -jar test_case.jar to invoke ...
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2answers
33 views

Unable to print * (star) value with echo

I have, my.sh while IFS= read -r line ; do v1="$line"; t1=`echo $line | awk -F= '{print $2}'` echo "$t1" done < $1 sample.txt say=hello test=0 0/15 * * * ? logs=valuelogs Output : [root@...
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0answers
16 views

find out which class is missing [migrated]

I was trying to install liquibase on my CentOS 6.9 it needs java (i have openjdk version "1.8.0_121") but i got this error: [root@sampleliquibase-3.6.2-bin..z]# ll total 11412 drwxrwxrwx. 2 ...
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0answers
66 views

rsync error code 20 when ran under systemd

Running CentOS7.4 , rsync v3.1.2 I've a python script(v3.6) that polls a remote file server location using rsync. Rsync ensures that the drop folder on the remote location is identical to the folder ...
-1
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3answers
40 views

Files and or directories keep getting deleted from CENT OS file server [closed]

Im using CENT OS 7 on a file server. On that file server, I have a directory that is used by an application at my company to store files. When that directory is deleted the application is not able to ...
0
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1answer
14 views

Fontconfig finds a font during scanning, but does not enter it into the cache

On a CentOS 7 installation I have a number of font files in /usr/share/fonts. Some of them have been correctly recognised by fontconfig and show up in fc-list, but others quite simply refuse to be ...
0
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1answer
25 views

Can't get plugin for Vim to work with Vundle. What am I doing wrong?

I am trying to install this plugin here for my Vim on my Centos 7 laptop. The instructions I followed to install the plugin manage Vundle are from the Github Vundle page here and then proceeded to ...
0
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1answer
43 views

How to run apache httpd 2.4.6 with a self-signed certificate signed with an elliptic curve key brainpoolP384t1, on CentOS 7.6?

I'm trying to run apache httpd 2.4.6 on CentOS 7.6 with a self-signed certificate signed with an elliptic curve key brainpoolP384t1, but apache is not accepting this as a valid key. I ensured all ...
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1answer
22 views

SSHFS symbolic link does not show up

So this issue is actually occurring between OSX and CentOS. I created an ssh mount using osxfuse: sshfs [ssh config name]:/remote/location/dir.ec.tory ~/client/location/dir.ec.tory -o ...
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0answers
34 views

Logging/tracking-down process that auto-reboots CentOS server at boot time

Background I have a bunch of CentOS servers with proprietary applications running on them which are part of a third-party security camera system supplied by an external vendor (i.e. I don't have ...
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0answers
35 views

Change color of top and bottom bars of GNOME 3

I run GNOME 3.28.3 on CentOS 7. Even after setting Adwaita-dark (the dark version of the default GNOME theme) as the application theme, the top and bottom status bars are still light gray. Is there a ...
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0answers
11 views

ASUS P5GC ethernet not detected on CentOS 7.5

Just installed CentOS 7.5 and I can't get the built-in ethernet working on my ASUS P5GC. lspci doesn't show it and installing kmod-r8168 doesn't work either. I've tried disabling and enabling ...
1
vote
1answer
32 views

Device name to use in luks commands for LVM LUKS

Can somebody with more LUKS LVM experience than me tell me what the correct device name is to use in this context. I'm trying to follow some instructions about using clevis and tang in CentOS. The ...
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0answers
5 views

CentOS RDO TripleO do not use proxy

I have a network which can go out to the network only using proxy server. Some of apps (CentOS RDO TripleO setup) do not use env variables and do not use proxy to download images from *.docker.io. ...
1
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1answer
29 views

Disable automatic package update in RPM package manager for single application in CentOS7

How can I disable automatic package update in RPM package manager for a single application in CentOS 7?
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0answers
15 views

Choosing a tool for two-way syncing folders over internet on CentOS [duplicate]

I'm looking for a tool which can sync files and folders over internet on CentOS 7. It better run as a daemon in real-time or short delay when files/ folders changes. I need to sync multiple folders. I ...
0
votes
1answer
28 views

How can I disable “WORKGROUP\” in smbclient

I have a pretty old version of Samba Server installed on a Linux machine. Which Linux normally doesn't require "WORKGROUP" or "SAMBA" or any domain name to log in. Normal username and password should ...
1
vote
1answer
39 views

sudo emacs doesn't read my elpa packages

Here is my problem on a server running CentOS 7 with emacs 24.3.1.: When I run sudo emacs <protected_file> on a file that I don't have write permissions, emacs doesn't read my .emacs file, nor ...
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2answers
38 views

Adding execute for specific users and groups on folders and remove it from files

I'm trying to execute this command but it does not get the expected results chmod -R u-x+Xrw,g-x+Xrw,o-x+Xr * I want all my directories to be executable, and all my files to NOT be, this is for a ...
2
votes
2answers
49 views

Set $PATH as OpenLDAP attribute

I need to set $PATH for OpenLDAP users (CentOS6/7). Not in .profile, not in .bashrc on client machine, but as attribute in LDAP on the LDAP server so it is set whenever the user logs onto any host via ...
1
vote
0answers
21 views

manage docker containers in cockpit without root

I have a docker server (CentOS 7) that has cockpit installed and wish to use cockpit to manage docker containers. My main account on the server is able to use sudo elevate permissions on the system. ...
5
votes
1answer
95 views

Script in /etc/cron.hourly/ never running

I have a script in /etc/cron.hourly : -rwxr-xr-x 1 root root 85 Dec 6 19:05 /etc/cron.hourly/nvidia_to_exclusive containing (with an empty line at the end): #!/bin/bash /usr/bin/nvidia-smi -c 1 &...
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1answer
117 views

vncserver dies immediately upon start

I'm trying to configure VNC server for remote logins on a fresh install of CentOS 7, but I just can't seem to get it working right. I've followed the install steps here including the firewall-cmd ...