RHCE and RHCSA tips and tricks

I did the RHCE exam some time ago, and still there are some tricks and advices I tell the people to bear in mind some of the things I used and that were also provided in the Red Hat Enterprise 8 Administration book: Don’t remember every step, it’s not effective, for example as I don’t recall syntax for BIND, I do remember package that has some files with examples and I use that one to check what I need to do Install mlocate and run updatedb as soon as you start, then you can use locate <file> to find out files in your system Use your preferred editor… it’s common to use vi or vim as it’s pretty standard, but if you’re used to another, make yourself comfortable in the system....

July 13, 2022 · 2 min · Pablo Iranzo Gómez

Unsupported upgrade for RHEL-based distributions without reinstallation

Most systems, based on RHEL, were not able to upgrade without reinstallation, or best said, not supported. The new version, that was released at around 18 months later contained so many changes that it was hard to test the upgrades themselves until leapp was introduced. Check the lifecycle here: https://access.redhat.com/support/policy/updates/errata However, the biggest problem could be the incompatibility of packages or package formats… but as usually there were some middle layers it was possible to upgrade without reinstallation by performing some manual steps....

April 23, 2022 · 15 min · Pablo Iranzo Gómez

In [email protected]_bot with examples

Redken in action with some examples Let’s learn about using Redken in Telegram or Discord with some examples…. but first, let’s add the bot to a new group based on the platform we’re using: Redken_bot in Telegram Redken in discord Let’s get hands on! First of all, some of the commands shown will require admin privileges in the chat (from the user point of view) and from Redken. Redken uses admin privileges to:...

January 20, 2022 · 3 min · Pablo Iranzo Gómez

LDAP query from Python

Recently, some colleagues commented about validating if users in a Telegram group were or not employees anymore, so that the process could be automated without having to chase down the users that left the company. One of the fields that can be configured by each user, is the link to other platforms (Github, LinkedIn, Twitter, Telegram, etc), so querying an LDAP server could suffice to get the list of users....

October 19, 2021 · 2 min · Pablo Iranzo Gómez

How to stake on NYM Validator 🐳🐳🐳

As said in the article about mixnodes and validators, NYM is a technology aiming for providing privacy for the communications. Once you get some tokens, PUNK at this time, you can use the web wallet to check the balance of your account and delegate it to mixnodes or gateways… but, using the binaries, you can additionally delegate to validators. For doing this, we first need the nymd binary on our system to follow the procedure for compiling it from the documentation for validators, but skip the remaining parts https://nymtech....

September 28, 2021 · 3 min · Pablo Iranzo Gómez
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