Questions tagged [linux]

Linux is the generic term for a UNIX-like open source operating system based on the Linux kernel. Use this tag for questions about DevOps practices, processes and tools in Linux environments.

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Creating a cron job with Ansible (ERROR! 'cron' is not a valid attribute for a Play)

I am relatively inexperienced when it comes to Ansible however I have previously created playbooks which will create a cron job successfully. For the life of me I cannot work out what is wrong with my ...
3
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1answer
36 views

Is it possible to securely delete a file from a virtual disk in a cloud provider?

Considering that virtual hard drives are generally formatted using something like ext3 that abstracts away from the underlying block device, which in and of itself is an abstraction over the top of a ...
1
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1answer
2k views

Apache container cant access php files mounted in /var/www/ - 403 error

I want to run my php website in a container with apache and php7 I am using this docker image : https://hub.docker.com/r/nimmis/apache-php7/ I run Fedora so I enter the example command given in ...
2
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2answers
4k views

How can a Windows server be a slave to Jenkins running on Linux when there in an error installing the slave-agent.jnlp file?

I want to have a Windows Server 2016 slave node with a master Jenkins (version 2.89.2) running on Red Hat Enterprise Linux 7.x. I am trying to install the slave-agent.jnlp file from the Jenkins web ...
4
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1answer
56 views

What's missing from this simple recipe that creates a user?

I've spun many boxes in the cloud before, but was growing tired of going through the same dance; and as I'm trying to get familiar with Chef, I figured, that's a good use case to do a little learning. ...
5
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1answer
113 views

Pause/Suspend guest in KVM without virsh and libvirtd

I have installed KVM without libvirt/virsh and virtualmanager. Packages which installed are kvm qemu-kvm bridge-utils libguestfs-tools How can I pause/suspend VM in this case?
8
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2answers
6k views

Difference between chroot and Docker

I don't understand the difference between docker and chroot. Yes its nice in terms of the packaging the registry. But somehow I get the feeling its just chroot with extra bells and whistles. I know I'...
-1
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1answer
156 views

How to avoid and fix the warning from Graphite-manage?

We installed Graphite on our Linux server, and when we started running it, we saw the following warning from the graphite-manage script: graphite-manage syncdb --noinput /usr/lib/python2.7/site-...
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2answers
54 views

CentOS 7 SSH login with Keys Authentication

Is there any possibility to create one master account (for one master laptop for example), from which I can log in to all accounts available on the server ? My server has Keys Authentication enabled ...
7
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2answers
2k views

Does Docker allow containers to be OS agnostic?

We currently use a Windows based server to host 2 VMs. One VM uses Windows with a Windows app and the other VM uses Linux with a Linux app. Is the below scenario possible? Bare server with Windows ...
3
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1answer
534 views

Build FreeBSD Docker image using Ubuntu host OS

I know that in generally it is impossible to build FreeBSD Docker image on Linux host OS due to different kernels and sys calls. Relevant discussion. However, I would like to know maybe there is a ...
2
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2answers
72 views

Automatic production deployment for a Node.js app on RHEL 7?

I am looking for some way to have a maximally simple(no Jenkins or anything like that) automatic production deployment for a Node.js application on a RHEL 7 system. The caveat is: At the organization ...
2
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1answer
48 views

archive contents of a reviewboard server as read-only

My team was using an Ubuntu box to host an instance of Reviewboard 2.5.2 that we used for a few years before migrating to a Bitbucket service in the cloud. The machine was maintained by my predecessor ...
5
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4answers
11k views

docker “Cannot mkdir: Permission denied”

I'm trying to run wordpress inside docker. I've been following this tutorial : https://www.sitepoint.com/how-to-use-the-official-docker-wordpress-image/ But when I run this command : docker run -e ...
5
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1answer
868 views

Are NixOS and GuixSD the incoming Linux distros of DevOps?

The main advantage of these distros is the declarative approach which allows for setup to be done in the same way as you would configure a Vagrantfile or Dockerfile. In the way that Docker replaced/...
1
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1answer
173 views

Best method of retrieving environment information via Salt Stack?

I have been tasked with using Salt Stack to find out what files/services exist in each of our environments (Test, UAT, Production). The Salt master can speak to all servers in Test and UAT (...
1
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0answers
106 views

Running MySQLite3 with PHP PDO in a Docker Container

I'm currently trying to build a site in a Docker container running in an Ubuntu VM, which has Apache and PHP installed already. I want to be able to access Sqlite3 features with PHP using PDO. ...
4
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2answers
294 views

How to create Golang Linux binaries using a Windows host

When go build is issued on a Windows host a .exe binary is created. How to ensure that a Linux binary is created on a Windows host? The following was tried, but did not solve the issue: GOOS=linux;...
2
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1answer
669 views

Incorrect timezoneID inside docker container

I have created a docker image from the base Centos7 image and while running the container from it, the time and timezone were not in sync with my host. To give the container the same timezone as that ...
4
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2answers
2k views

How to automate Powershell's interactive Get-Credential method?

I am trying to write a python script which automates the powershell's Get-Credential method. Here is something i wrote: import subprocess COMMAND_LINE = 'powershell' powershell = subprocess.Popen(...
2
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1answer
1k views

Ansible tmp files created with odd permissions

I have an ansible playbook which can be simplified to this: - name: Provision server hosts: all_hosts become: yes ...
1
vote
1answer
1k views

After removing Docker container, why is it automatically re-created?

I'm using ubuntu-16.04 desktop and installed Docker-1.5-1 and docker-engine-17.05.0~ce-0~ubuntu-xenial, in which I installed openmedicus/phplist. My aim is to remove the container, and the image as ...
4
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2answers
914 views

How to detect what interface has private IP in Ansible

I plan to reconfigure iptables on our servers (mostly CentOS 7, some CentOS 6) with different network configurations, some on 1Gbit interface, some on 10Gbit, some with VLANs and some with configured ...
7
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1answer
88 views

Debug BackendConnectionErrors from Kubernetes Service LoadBalancer sesrvice

We recently moved some of our production infrastructure to Kubernetes. Many pods are exposed through a LoadBalancer service on AWS. This creates an ELB, registers each node in the cluster with the ELB,...
1
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3answers
6k views

How to get memory usage per process with sar, sysstat?

Can I get memory usage per process with Linux? we monitor our servers with sysstat/sar. But besides seeing that memory went off the roof at some point, we can't pinpoint which process was getting ...
5
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1answer
184 views

Advantages of Linux Containers over Docker

I'd like to understand the differences between Linux Containers and Docker, especially what kind of advantages Containers have in comparison to Docker.
5
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1answer
2k views

How do you connect a build node to the Jenkins master?

I'd like to connect a build node to the Jenkins master. Ideally without using a web browser or being in front of the physical machine. What would be the easiest way to achieve that?
47
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7answers
69k views

How do you back up Jenkins jobs & master configs?

I'd like to backup all Jenkins jobs and config files. What's the easiest way of doing it?
16
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3answers
4k views

Which SCM tools does Jenkins support?

I'm aware that Jenkins supports Git and SVN. What other SCM tools does Jenkins support?