IT infrastructure and architecture How to disable systemd-resolved in linux ubuntu 18.04 and 20.04... and how to ensure that your resolv.conf does not update on each reboot In the latest distributions of ubuntu 18.04 and 20.04 that I used have activated the sysemd-resolved that I do not like at all, especially for not allowing me a more particular
IT infrastructure and architecture How to export a private key to RSA PEM format with ssh-keygen To manage authentication to ssh or sftp services I always do it through ssh keys, and I usually generate them with the following ssh-keygen command:ssh-keygen -t rsa -b 4086 -C usersftp@localhost
IT infrastructure and architecture How install docker-compose on ubuntu 20.04 armhf in Raspberry Pi 3 B In the repository of the official list of versions in githab:https://github.com/docker/compose/releasesthere are no versions for armhf. Well, I haven't found them.Therefore, to install docker-compose on a
IT infrastructure and architecture How install docker on ubuntu 20.04 armhf in Raspberry Pi 3 B Run the command:sudo apt install docker.io Once installed we check the version:docker --version Which in my example returns:operatorvm@vmrp01ubuntu2004web:~$ docker --version Docker version 20.10.2, build 20.10.
IT infrastructure and architecture How to make a user sudo in ubuntu 20.04 With a root user or with sudo privileges execute the following:sudo adduser username sudo Example:ubuntu@vmrp01ubuntu2004web:~$ sudo adduser operatorvm sudo Adding user `operatorvm' to group `sudo' ... Adding user operatorvm to group
IT infrastructure and architecture How to create a user on Ubuntu 18.04.3 LTS armv71 on Raspberry Pi 2 Model B+ encapsulated to only access by SFTP In this entry we will see how we create a user on an Ubuntu OS 18.04.3 LTS armv71 on a Raspberry Pi 2 Model B+ that can only access a specific
IT infrastructure and architecture Backup recommendations in Windows 10 I am going to detail the backup recommendations to follow on a Windows 10. They are logical recommendations that can be followed in the same way on other operating systems like Ubuntu or
IT infrastructure and architecture How fix error Impossible to lookup any SSHKeyStore named instance: org.jboss.weld.exceptions.WeldException: WELD-000049: Unable to invoke public void org.uberfire.ssh.service.backend.keystore.impl.storage.DefaultSSHKeyStore.init() in jBPM KIE Server Today I encountered the following error that prevented me from deploying the jBPM application to the JBoss Wildfly 19.1.0 server in the business-central.war drop-down:22:04:40,186 INFO [org.
IT infrastructure and architecture How to fix error when booting Ubuntu 20.04 UNEXPECTED INCONSISTENCY RUN fsck MANUALLY On a laptop with Ubuntu 20.04 without battery after having a power outage I had the following error when booting:blk_update_request: I/O error, dev sda, secto 1871712792 op 0x0:
IT infrastructure and architecture How to fix CentOS 8 boot error: Metadata corruption detected at xfs_agi_verify. Unmount and run xfs_repair In this entry I detail how I managed to fix this problem that I have had in CentOS 8: 'Metadata corruption detected at xfs_agi_verify. Unmount and run xfs_repair. First 128
IT infrastructure and architecture How to implement a CDC (change data capture) of a database Hana table using Apache Kafka and the kafka-connect-sap connector in incremental mode to a PostgreSQL database This entry details the implementation of a CDC (change data capture) of a Hana database table using triggers at the source database layer to identify the insert, update, and delete changes to that
Development How to allow access to the jBPM Git repository from a network interface other than localhost The jBPM 7.43.1 Git repository only serves localhost by default. If you have the jBPM server on a machine other than where you are developing, it is required to enable this
IT infrastructure and architecture How to change display resolution in TTY console The TTY console in Ubuntu 18.04.3 is 800x600 by default and it is too small for the use of my virtual machines in VirtualBox where I have them open to see
IT infrastructure and architecture How to change font and font size in TTY console I work with VirtualBox a lot, and I use a lot of TTY consoles, but I never like the size and type of font that usually appears. For example, the one for Ubuntu
IT infrastructure and architecture Unable to verify certificate 'Server-Cert'. Add "NSSEnforceValidCerts off" to nss.conf so the server can start until the problem can be resolved Error starting apache httpd service in a Centos 7:[root@localhost conf.d]# systemctl status httpd ● httpd.service - The Apache HTTP Server Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; vendor
IT infrastructure and architecture Basic use of SCP to copy files and directories I detail below how to make copies of files and directories using SCP from both remote host to local and vice versa, in all the examples I specify authentication using certificate with the
IT infrastructure and architecture How to solve the loss of the bidirectional clipboard in a VirtualBox machine I always work with many virtual machines that I never close and always save the state of the machine instead of closing it. Many times I find that I lose the clipboard between
IT infrastructure and architecture First steps with Kafka Connect HTTP Sink: installation, configuration, errors manager and monitoring The kafka connect HTTP Sink connector is very useful to be able to send any message from a topic to a remote http service by get or post method. A use case in
