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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15 views

Using Azure Active Directory as authentication backend for ssh on linux box

I used to use on-site active directory (providing pubkey though a custom AD field), but in my new company they are using Azure AD. I don't think my old way would work, did anyone already did this ? If ...
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1answer
9 views

Ansible user_module exit with "rc: -25" if UID is large

Ansible user_module exit with rc: -25 if trying to create user with UID provided from Active Directory (AD) domain controller (DC). main.yml - name: Configure local user for example.com user: ...
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1answer
57 views

How to assign static IP to Kubernetes cluster?

Is there any way to assign static IP to Kubernetes cluster, in which any user can able to access its application over static IP only. for an example, I have set up a cluster over 192.168.0.131 (master)...
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6 views

Renewing and pushing certificates on Linux virtual machines and Openshift containers

We use Venafi application which renews the certificate on the Linux virtual machines(VMs), then we export the certificate's public key, send it to other teams who update their records. My work place(...
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1answer
81 views

Ansible with OpenSUSE transactional server

When using an OpenSUSE transactional server, transactional-update must be used instead of Zypper. Is there any way of doing this with Ansible?
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1answer
70 views

How to add a string to a line when it doesn't exist?

I'm trying to solve a problem where I want to add a setting 'pci=noaer' to all kernel definitions in /boot/grub/grub.conf, but only if the setting doesn't exist. I've managed to get the basic ...
1
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1answer
182 views

Minikube will not start again after a stop

Running gentoo linux... I am new to kubernetes and learning it on my dev cloud. I am able to start minikube with no issues (other than the second node is missing...not sure why). Then I stop minikube. ...
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0answers
17 views

Creating sub-directories in a mapped drive?

I created a Samba (v4.x) share drive on a Linux box that's accessible to Windows nodes. I was able to access the Samba share (via username/pw creds) on my Windows box, and I mapped a Windows driver ...
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1answer
12 views

Team City Server issue after upgrade

Recently we have upgraded TC to the latest version (TeamCity Professional 2021.1.1 (build 92714)). After upgrade builds run fine when a new VCS root is created, but after a push is made to the ...
0
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1answer
77 views

Difference between Docker container with Debian vs VM with Debian?

What is the difference between running a Docker container with Debian (eg. https://hub.docker.com/_/debian/) and then running a virtual machine with Debian? And why is it still an advantage if any? I'...
1
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1answer
42 views

How to pin public root key when downloading an image with docker pull (Docker Content Trust)?

How can I execute docker pull (with Docker Content Trust enabled) such that it fails if the image doesn't have a valid signature using the private key corresponding to (or subordinate to) the public ...
2
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1answer
56 views

Ansible - Variable expansion inside hostvars declaration?

I have a hardcoded hostvars line, like so: node1_hostname={{ hostvars['192.168.0.162']['node1_hostname'] }} I have a set_fact variable from a previous play that I'd like to expand in the host section ...
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1answer
146 views

Failed to install kubernetes on centos

Following the official documentation, I have an error when trying to install kubernetes cluster yum package. I am on Centos 7 using yum. So I run this commands: cat <<EOF | sudo tee /etc/yum....
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1answer
1k views

Ansible: register variable with loop

What’s the best way to use registered variable ‘audit_tools’ to check if all items are own by root ? Do I need to use Jinja2 filter or something ? Thanks - name: Verify audit tools are own by root ...
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1answer
155 views

Ansible No such file or directory error message for any executable in Amazon Linux AMI

I'm trying to run this command in a Amazon Linux AMI instance - name: Run docker shell: systemctl enable docker && systemctl start docker And receiving this error message "stderr&...
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1answer
90 views

any way to limit "docker logs" output by default?

Context* I forgot to pass the "--tail" options to the "docker logs" command when inspecting a running container. The affected container dumps tens of millions of logs. The command ...
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0answers
75 views

Is running linux container on windows aws instance possible?

what I'm trying to achieve is running a Linux(ubuntu LST) container inside a windows server 2019 OS. The problem is that the windows OS runs as an AWS instance. There have been problem for me trying ...
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2answers
931 views

Can I upgrade a docker image/container from buntu 18.04 to ubuntu 20.04?

I have a host ubuntu 20.04 running my software on docker with a container derivated from ubuntu 18.04. I would like to use ubuntu 20.04 for several reasons (like the better software on 20.04). If I ...
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0answers
492 views

Ansible/AWS dynamic inventory -- How to create groups based on tags?

I am trying to create custom groups, based on tags. I am using this doc as a reference: https://docs.ansible.com/ansible/latest/plugins/inventory.html#inventory-plugins As a baseline, in my aws_ec2....
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1answer
43 views

How do I convert "\n" to linebreaks in my docker logs?

I am using docker-compose up to start a web server in linux but am finding that the stdout is printing "\n" characters instead of creating new lines. This makes stack traces difficult to ...
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2answers
347 views

How to Save and Restore the Iptables rule and configuration from file?

I want to save the current iptables configuration to a file and restore it from a file. I have a lot of rules and modifying the rules really hard for me. So, how can i do that?!
2
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1answer
3k views

GitHub Actions Runner execute commands with sudo GitHub Actions

I have a GitHub action set on self hosted Ubuntu VPS on Linode. I ran sudo ./svc.sh install and then ./svc.sh start. The runner is up and working but I have a command in my yaml file that needs to run ...
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0answers
539 views

Remote connection from Docker container by FTP

I built my docker image and run it: docker run --rm -P -d test:latest Then I entered the command and opened connection: ftp open XXX I successfully connected and entered user data. After that I ...
3
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1answer
78 views

Porting a docker container to a different Linux host OS

I'm new to Docker. I have looked at many tutorials, however, this is still not clear to me : For example, If I create a docker image on a system which is using Ubuntu as the host OS. Can I then later ...
0
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1answer
51 views

What are the daily job duties of a devops? [duplicate]

I have been working for linux management over 10 years. In the last 5 years, I have added a lot of coding experience through software development like php, ruby, go, etc. I wanna be a devops, but I ...
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2answers
368 views

How to sync two directories on same host using Ansible?

I am using the below playbook for mounting partitions on another EBS volumes while provisioning instance on AWS --- - name: Mounting necessary partitions hosts: localhost become: ...
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1answer
841 views

How comes a GitLab CI/CD job cant' find its artifacts?

In the Open Source ventilator project, we aim to provide those who focus on testing with a ready-to-go flash file for the Arduino controller board. While the binaries seem to be there, for some ...
1
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1answer
20 views

How do I package a jar and a Linux VM to run in Windows? [closed]

I'm new to DevOps so please forgive my ignorance. I have inherited a Win10 Java app that is currently run by pressing play in NetBeans. It makes API calls to a server running in a Linux VM. What I'd ...
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1answer
875 views

What is the difference between a jail environment in linux and docker container?

I am curious about difference between a jail environment in linux and Docker. What separates these two technologies?
2
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1answer
60 views

SFTP server with third party user management system?

I understand how to set up SFTP servers on Linux and create users and their passwords manually. So basically, the users get authenticated as normal Linux users get authenticated through /etc/passwd. ...
0
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1answer
227 views

Which Jenkins file is responsible for Enable cache setting

I want to know how can I modify the below setting from Jenkins server and not UI: http://XXXXX:YYYYY/configureSecurity/
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2answers
50 views

How to run Ansible command to update imunify360 settings

How can I use Ansible to run the following CloudLinux Imunify360 commands properly on CloudLinux 7 (similar to CentOS7)? I tried different ways to "escape" the colons in the commands and it doesn't ...
4
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1answer
2k views

Running a command as a specific user on an ec2 using ssm

Background I want to automatically configure an EC2 via a build, using the aws cli and ssm. The (manual) setup for the container looks something like this: Create an EC2 Run a shell script as root ...
2
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1answer
5k views

how to prevent Ansible from showing output on screen?

I have this in my playbook which execute a command on remote server and enters its log on local server. - name: run script shell: runuser -l testuser -c "/tmp/test.sh" register: myshell_output ...
1
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1answer
815 views

How to determine which packaged pip to install in order to run the Ansible pip module?

I am struggling to find a reasonable method to detect which of python-pip or python3-pip I should install depending on the contents of the ansible_python fact. This is on Debian and Ubuntu. Looking ...
0
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1answer
31 views

Where is Puppet's enviroments directory on Amazon Linux2?

I am using Puppet version 3.8.7 on Amazon Linux2, trying to find the directory containing the Puppet environments. I tried to find it with the find command looking for files named "production" or ...
1
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1answer
30 views

Is there a way to clone an ec2 from inside the ec2 terminal?

I want to be able to back up my linux accadamy lab servers but they don't provide a way to to this. I'm wondering if it's posible to clone my EC2 lab server from inside the EC2 to get round this?
3
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1answer
4k views

Consul: how to remove dead client nodes quickly

Background: When running Consul client-mode in AWS, EC2s are constantly getting replaced, which results in a lot of dead client nodes when looking at the Consul UI or via consul members. Already ...
3
votes
1answer
2k views

Azure DevOps Artifact.zip folder structure for .NET Core 3.0 application

I have an ASP.NET Core 3.0 application for which I have a full CI/CD setup in Azure DevOps. The Application is hosted on a Ubuntu 18.04 server machine. In the Build Pipeline, the solution is built ...
0
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1answer
87 views

PowerShell command to automate Azure Linux VM [closed]

I am looking for some PowerShell command which can check if any update/patch need to be applied to existing Azure Linux VM and then apply the patch if required. I will then use this PowerShell ...
0
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1answer
47 views

Run command from Jenkins to Linux Server

I have a HAProxy server setup in Azure Linux Machine. How can I run a HAProxy start/stop command from Jenkins to multiple Linux server?
2
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1answer
435 views

How to resolve the dependencies while installing locally downloaded packages?

I have simple playbook where trying to install the Debian packages downloaded locally in my server. This playbook runs on localhost and install the Debian packages in the same system. But this ...
1
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1answer
216 views

Create User Using Ansible with Authenticate Pem File

Community, I am creating a user on the client machine using Ansible but the issue is it creates a user and add authenticate file but getting an error while SSH to that machine using created, User. ...
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2answers
1k views

Ansible resetting swap linux

I am newbie to Ansible, i failed using ansible via command that way : ansible host -a "/sbin/swapoff -a && /sbin/swapon -a" Only this worked ansible host -a "/sbin/swapoff -a ansible host ...
2
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0answers
37 views

Issue building deb package using Docker/Windows

I am trying to create a way for our developers to be able to build deb packages from their Windows machines. We would like to reuse what we have for *nix so I've written a few batch scripts which are ...
0
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2answers
13 views

How to analyze the file activities due to process?

I need to analyze the file i/o operations caused due to a process. So I would like to know, which all files are affected by this program. Is there a tool for this particular use case?. One of our ...
9
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4answers
17k views

Docker compose volume syntax valid for Windows and Linux

We have developers working on an app using both Windows and Linux. The application is built within a Docker container, and ships a docker-compose specification for the build environment. The local ...
1
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2answers
5k views

using copy module with wildcards

I need to copy a database backup file from a primary server to a standby server. Since I can't use synchronize, I was following this method: copy file to local ansible server from primary, then, copy ...
2
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2answers
100 views

reboot server during Ansible tasks

I have 3 scripts that must be run on server one by one. for example: - name: find config shell: /data/scripts/config1 become: yes become_user: root tags: find_config - name: change config ...
0
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2answers
930 views

copy contents of file on ansible server to another file on remote servers

I have a bash script on about 70 severs in /opt/zservice/etc/config that i want to change its content with ansible. the new content is on ansible server in this path /data/new_config. how i can use ...