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Questions tagged [centos-7]

Version 7 of CentOS Linux distribution. The CentOS Linux distribution is a stable, predictable, manageable and reproducible platform derived from the sources of Red Hat Enterprise Linux (RHEL).

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oracle installation pre requisite check error

I'm trying to install Oracle 11gR2 on Oracle Linux 7.4. While the installer is performing prerequisite checks, we are getting error: This is a prerequisite condition to test whether the OS kernel ...
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OpenVAS scanner TIMEOUT

The scanner was working just fine until I ran a task with 58 targets (CSV file) and the deafult Maximum concurrently scanned hosts = 20, the load got way too high and I couldn't log back on or risk to ...
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My Gnome session on Centos 7.0 crashes and sends me back to the login screen

This happens 5 or six times a day. I don't know where to start. This is from /var/log/messages: org.gnome.Shell.desktop: XIO: fatal IO error 11 (Resource temporarily unavailable) on X server ":0" ...
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fresh FreeIPA server installation has periodic httpd segfault error

I'm having an issue with a fresh FreeIPA installation on a CentOS 7 server. I installed and configured FreeIPA (ipa-server-4.6.4-10.el7.centos.x86_64) per their quickstart guide: https://www.freeipa....
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16 views

Malicious Outgoing FTP Connection to another server [on hold]

There was a malicious outgoing connection from my Cpanel server to an another server's FTP port. My server has many shared hosting accounts of my clients. How can I check which user/account sent this ...
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7 views

CentOS7/GNOME: what application is preventing screen lock?

Recently I've started coming back to find my CentOS 7 (running GNOME) laptop's screen fully lit and unlocked, even though I haven't done anything on it for [many many] hours (previously it would lock ...
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0answers
12 views

What is reloading postfix twice at 4AM

Centos 7, postfix I get a daily reload of Postfix. It's happening twice, back to back. Jan 8 04:02:08 tn2 postfix/postfix-script[8927]: stopping the Postfix mail system Jan 8 04:02:08 tn2 postfix/...
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27 views

invalid ue golomb code FFmpeg CentOS 7

I use this commaned ffmpeg -re -i http://king-ott.com:80/live/919363102552/VtnayAcZgEJbXZe/17290.ts -c:v libx264 -c:a libmp3lame -ar 44100 -ac 1 -f flv rtmp://myvpsip/live/hd.m3u8 but it show "invalid ...
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24 views

Always run `git` command by a specified user

I'm looking for a solution to the problem of running git pull by many Linux users. Let's assume that there's a git repository under /var/www/html and there are 3 users on the CentOS 7 machine: user, ...
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0answers
11 views

MySql error connecting [closed]

Recently I have a problem with connecting to Mysql. From a week ago at the 4pm I got a error connecting to mysql in my site. I using LiteSpeed server , mysql and php. Until yesterday With the ...
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21 views

EFS-CHMOD takes a Long time

I'm trying to run CHMOD commands on centos7, and it takes almost 2hours. And not only this command, but I am trying also to run the deploy commands and indexing. It takes up normal time and I don't ...
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2answers
51 views

Having problems with a local yum repo

I've tried to set up a local repo on a server (alecto) using reposync. This part seems to go OK and the the target directory (/repo) gets populated. I did this so I could update multiple VMs running ...
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1answer
31 views

Vsftpd is not working properly

OS:CentOS 7.6 64bit problem The FTP service is not working properly. Repeatedly log in when connecting. Unable to authenticate user. Information is provided below. If you know how to solve this ...
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1answer
23 views

Linux NUKE_PATH Environment Variable only regonized in GUI / Interactive

I have set the "NUKE_PATH" environment variable which is recognized and loads without issue when running nuke from an open terminal but when I submit a remote render job using RUSH, it is being ...
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1answer
73 views

Starting Tomcat 8.5 using systemd on Centos 7

I installed Tomcat 8.5 and I am able to start it successfully manually, for example: su tomcat startup.sh works properly and tomcat is able to serve on port 8080. I need to automate the startup, so ...
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6 views

override_gid in sssd with local users and two Active Directory Domains

My sssd.conf includes two domains. The first one "BOB" authenticates and uses the override_gid. The second one "RAY" authenticates but doesn't use the override_gid. Anyone know how to get the ...
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1answer
39 views

Unable to install Postgres extension pg_prometheus and prometheus-postgresql-adapter manually on CentOS

I am trying to setup Prometheus with PostgreSQL DB on a CentOS server. I am able to install Prometheus and PostgreSQL on the server but unable to install pg_prometheus extension and the prometheus-...
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30 views

Intermittent connection on centos on clean install - logs point to christian polyamorous society IP?????

I am getting an intermittent connection when fresh PXE installing centos 7.5.1804 with digital rebar though I don't believe this has anything to do with the method I am using to install the OS. Works ...
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14 views

how to install boxbilling software in a directory

I have installed boxbilling software in my cpanel mydomain/billing but the strange thing is instead of software homepage being mydomain/billing it is mydomain/billing/index.php?_url= and something ...
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0answers
40 views

How to fix corrupt root XFS filesystems via ssh?

My home dir is under / partition. and some file broken in it. rm: cannot remove ‘/home/user/Downloads/kernel/drivers/gpu/vga/modules.builtin’: Structure needs cleaning How to reumount / to read-only ...
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15 views

Linux Nodes on Virtualbox Unable to ping each other

Running four CentOS 7 nodes on Oracle Virtualbox. The purpose is to set up a clustering lab. When I try to set up auth, pcs cannot communicate with the other nodes. selinux is disabled, firewalld ...
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16 views

I have encrypted LVM2_member partition I want to mount and access the data on but I cannot

TLDR; I have a encrypted luks partition which is a VG member I cant access, I have the password for the volume. I just want to mount it so I can get some data off of it. All of this is running on ...
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0answers
8 views

Changing xguest configuration

I want to use xguest in Centos 7 to provide a lab interface that is secure from tamper, malicious or otherwise. The problem I am having is how to change the resolution and add startup scripts to the ...
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1answer
55 views

VM resolution no better in VirtualBox despite installing Guest Edition

Installed the guest edition in CentOS7 vdi and rebooted the system and then went out of scaled mode. but the resolution still doesn't look good . Its confined to 1024 X 768 and scroll bars appear ...
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0answers
10 views

chromium-browser won't run after modifying /usr/bin/chromium-browser

I'm trying to get chromium to permanently run in headless mode inside a docker container. In my dockerfile, I'm doing the following: sed -i "s/chromium-browser\"/chromium-browser\" --headless --no-...
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0answers
10 views

How do i query chrome cookies info using sqlite3? [duplicate]

When i go to chrome://settings/siteData the i look for the info: for example : I can see the value of the content for the session id manually. I tried to do the same from command line and the value ...
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1answer
15 views

How can I show installed CSP's on my Linux system without using the cpconfig util?

How can I show a list of installed Crypto Service Providers without using cpconfig or csptest? How can I check if there's a CSP on the current Linux system? The system is not mine and I'm told to ...
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1answer
18 views

Downloading CentOS 7.2 64-bit (or CentOS 6.8, 64 bit)?

For some reason (software compatibility with RedHawk), I need to use CentOS 7.2 (64-bit) instead of the most updated version of CentOS 7.6.1810. I am asking around to see if there is still a chance ...
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1answer
26 views

Grub2 of previous OS controls the boot process

I have 3 OS's on my computer. First, I installed windows 10. Secondly, Ubuntu 16.04 LTS (with GUI). Thirdly, CentOS 7 (without GUI). During Ubuntu installation, I installed Grub2 into MBR and ...
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2answers
132 views

Received empty response from Zabbix Agent at [X.X.X.X]. Assuming that agent dropped connection because of access permissions

I have a Zabbix configuration problem here in the company a few days ago. I'm having this error on the hosts page in the Settings portion. I have already done several tests, being: Agent and Server ...
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1answer
59 views

Don't deliver mail to certain addresses

I have a Postfix 2.10.1 running on CentOS 7. This service will deliver email notifications that are sent to the postfix via SMTP. Now, some users should not get those notifications. Since the sending ...
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0answers
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Whats the equivalent command for “docker.io -d -b br10 &” in centos7

I am learning docker and need your help in below: I have created a bridge network and want to add it to docker. The tutorial was performed on ubuntu so the tutor user "docker.io -d -b br10 &" to ...
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1answer
38 views

Luks encryption block name format

After disk encryption with LUKS I have chacked my disk with lsblk and found the bellow output. Here the luks id luks-95a00a58-7a6f-429a-a45f-02308d9b1b28 is not familiar to me . What is the meaning ...
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0answers
67 views

How to calibrate 16:9 built-in touch-screen to a 4:3 resolution?

I need help with an issue we're facing in a project where we are moving from a Windows-based POS environment to one running on CentOS7. The problem consists of a number of factors, please find the ...
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0answers
72 views

Migrating CentOS to Hyper-V fails to boot GNOME

Centos Version: 7.5.1804 Kernel: 3.10.0-862.14.4.el7.x86_64 I have prepared a CentOS VM using virtual box on an internet connected machine and imported it onto a network without internet connectivity....
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14 views

CentOS 7 Samba Shares accessible from Windows VM (using lidarr,radarr,sonarr)

I have just setup a new server and I am trying to get something working properly and I can't seem to. I have my server running CentOS7, its got 6-4tb drives in a ZFS pool that I need to be able to ...
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0answers
99 views

How to make a desktop icon on centos 7 a trusted app?

I am fairly new to Linux. I have successfully created a desktop shortcut using the method where you create a new .desktop file and add in the information. The issue I'd like to overcome is that ...
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1answer
67 views

Unable to connect internet in bridge mode in vmware

I am trying to install CentOS 7 minimal in VMWare, but when I tried to connect Internet during the installation in bridged mode, it refused to connected and, after few seconds, it automatically ...
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0answers
19 views

Why is the VmRSS reported inconsistent when using mmap?

One application that we have combines two elements: it allocates a 707 MB memory segment using mmap(0, sizeof(T), PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_HUGETLB, -1, 0). it reports ...
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20 views

Zipping directory while files are add

Sorry for the silly question but I cant find anything online about this. Lets say I have a directory ~100GB and I execute tar -cvf mydirectory.tar /mydirectory Zipping the directory might take ~15 ...
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0answers
23 views

Unable to connect to vsftpd instance managed by xinetd on Centos 7

I am attempting to run an instance of vsftpd and have additional access controls and logging performed by xinetd. On the VM running both services, I can successfully initiate a ftp connection and ...
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0answers
585 views

CentOS 7 Cannot find a valid baseurl for repo: base/7/x86_64 When yum update

This error is driving me crazy, I have been trying everything posted in the forums and nothing works. When I Type: # yum update I get the following error: [root@www yum.repos.d]# yum update ...
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CentOS 7 is not logging to files anymore

my CentOS 7 Server is not logging to messages or maillog anymore? Restarted rsyslog and systemd-journald - nothing changed - both services are running. Hope someone could help me what to check.
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3answers
731 views

Failed to install cuda on centos 7

Following the instructions to install the cuda found here: https://docs.nvidia.com/cuda/cuda-installation-guide-linux/index.html e.g. $ sudo yum groupinstall "Development tools" $ sudo yum install ...
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0answers
24 views

Is fifo pipe size limited by disk cache allocated space?

On Linux CentOS 7 I am using named fifo pipes created with mkfifo to handle data passing between pairs of processes running on a multiprocessor disk server (Dell R730xd with 132GB RAM and 20TB RAID ...
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1answer
180 views

Redirect subdomain to Docker container using NGINX

I have NGINX set up on Centos 7.5, listening on port 80, and directing the traffic to a Gunicorn server. That is the main purpose of this server, and these are are locally installed applications, no ...
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0answers
33 views

ReadOnly overlayfs from multiple NFS mounts

I am trying to use overlayfs to overlay multiple nfs mountpoints. Since I only need read-only access, I did not include the upperdir and workdir options. My command looked like: mount -t overlay ...
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1answer
29 views

How to run a bash script automatically at gnome login

I want to use Gnome's inbuilt Screen Recorder for recording GUI sessions for audit purpose. To automate this, I changed the Shortcut for the screen recorder as "Alt+U" and then executed command "...
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1answer
69 views

selinux preventing PHP/Roundcube from connecting to local SMTP or IMAP ports

EDIT: I've determined the cause is selinux. After disabling enforcement with setenforce 0 everything worked. So the new question is, what's going on with selinux? I only have default CentOS 7 policies....
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16 views

trace-cmd.service Slowing Down Bootup?

I installed trace-cmd.x86 package on CentOS 7 because I was planning to trace some latency issue in my application. But then, I noticed once awhile, the boot up time took like 2+ mins. Then, I ...