Linux Guru

Image source certbot 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 running certbot --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. Yo

Install Apache Using Ansible Playbooks

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 Ansible playbooks 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.

How to Backup a MySQL Database

Backup a Single and All the MysQl Databases. Single database: mysqldump -u root -pmypasswd vishalvyas > /opt/vishalvyas.sql Restore: mysql -uroot -pmypasswd vishalvyas < /opt/vishalvyas.sql To back up all databases on a particular server, use the mysqldump command: Backup all the databases: mysqldump -u root -pmypasswd --all-databases > /opt/alldatabase.sql Restore: mysql -uroot -pmypasswd < /opt/alldatabases.sql Thanks, Vishal Vyas

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Secure nginx with Let's Encrypt on Ubuntu 18.04

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