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Another instance of Certbot is already running - Solved - Linux guru

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I got this error while configuring SSL on my website using certbot. So here is the steps which i used to resolve this `Another instance of Certbot is already running` error.


Error : Another instance of Certbot is already runningcertbot --server https://acme-v02.api.letsencrypt.org/directory --manual --preferred-challenges dns --installer nginx -d *.vishalvyas.com Another instance of Certbot is already running Reason : when you run certbot form your machine and unexpectedly stop the command, Then cert bot is not running but it left some .certbot.lock files behind.You need to kill the certbot instance form your machine. Solution : Run the below command to find killed certbot.find / -type f -name ".certbot.lock" You can see result of the command, If there are, you can remove them. Run below command to remove them.find / -type f -name ".certbot.lock" -exec rm {} \; And try again. Hope your problem is resolved. You can read more articales on my blog about let's encryp…
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Install Apache Using Ansible Playbooks

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Ansible is a automation tool which is widely used, you can install and install, configure and manage number of system and services remotely. you can install software and manage services and tasks without needing manually log in to each servers. you have to install ansible in one machine and use ssh to communicate host each other.



Ansible uses Playbooks which is written in YAML format. it's uses module base format. with playbook can run multiple tasks at time and provide more advance functionality, YAML file always start with "---" syntax. In this article we will see how to install and configure apahce2 using ansible YAML script. Master server : 10.80.253.11 [Ansible server, ] Slave 1 : 10.80.253.12 [need to install apache2 in slave 1] Slave 2 : 10.80.253.13 [need to install apache2 in slave 2] We need to configure slave server info in our ansible configuration file, click here to know how to add client machine to ansible. Let's update our apache2.yml file and install…
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Setup password less SSH on linux

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In this article i will explain you to how to connect remote server machine using password less login.
SSH client : 10.80.253.11
SSH remote Host : 10.80.253.12














Generate a pair key on ssh server :ssh-keygen -t rsa Generating public/private rsa key pair. Enter file in which to save the key (/root/.ssh/id_rsa): Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in /root/.ssh/id_rsa. Your public key has been saved in /root/.ssh/id_rsa.pub. The key fingerprint is: SHA256:1Je7TcRc58MxO5C6qBJ6qy44L+nxT8xHSXfBHUpNy48 root@slave1 The key's randomart image is: +---[RSA 2048]----+ | .o++ooo| | ...+B+o=| | ....o+o+=.| | ..o .o oo o| | oS . oE.. | | o.. . . + | |.o .+... . . | |=.o..o.. | |.=+++oo | +----[SHA256]-----+ Copy key to client machine :ssh-copy-id -i id_rsa.pub root@10.80.253.12 it will ask you the password. Now you can login to client machine witho…
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Create aws s3 bucket using cli

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In this article i will explain you to how to manage s3 bucket and objects using AWS cli command line interface. for that you will have to configure AWS cli interface to your local linux machine. You can configure cli from. HERE.




After configured aws cli to your local machine, you can run all below commands. How to create bucket using AWS Cli.root@master:~# aws s3 mb s3://linuxgurubucket make_bucket: linuxgurubucket Listing Bucket : To list all bucket : root@master:~# aws s3 ls 2018-05-01 15:28:37 linuxgurubucket To list all objects from bucket :root@master:~# aws s3 ls s3://linuxgurubucket 2018-05-01 15:32:16 71515 vishal.jpg How to copy local file to s3 using aws cp command :root@master:~# aws s3 cp ansible.sh s3://linuxgurubucket/ upload: ./ansible.sh to s3://linuxgurubucket/ansible.sh To check it's upload or not :root@master:~# aws s3 ls s3://linuxgurubucket/ 2018-05-01 15:34:19 82 ansible.sh 2018-05-01 15:32:16 71515 vishal.jpg To remove file from s3 bucket using cli:
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Secure nginx with Let's Encrypt on Ubuntu 18.04

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Configure Let's Encrypt SSL for Nginx webserver on Ubuntu 18.04.Let's Encrypt is a CA authority that provides free SSL certificates. You can get a certificate for web server like apache and Nginx. In this tutorial, I will explain you how to obtain ssl certificate using Certbot in the ubuntu server and make your website more secure. We will use Nginx web server in this tutorial. Prerequisites Setup Ubuntu 18.04 server with running Nginx webserver. Domain name, In this tutorial I will use linuxguru.ml & www.linuxguru.ml domain. You can buy a free domain on https://my.freenom.com/.
Install certbot.Certbot is an EFF tool that obtains a certificate from Let's Encrypt and Automatically enable HTTPS on your website. So let's install Certbot on Ubuntu 18.04. We assume that you have installed Nginx before. Add the repository : add-apt-repository ppa:certbot/certbot This is the PPA for packages prepared by Debian Let's Encrypt Team and backported for Ubuntu. Note: Packag…
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