LPIC certification: "Vendor neutral," meaning you need to memorize (note I said memorize, not learn) how both Debian and RHEL do things. For example, you'll be tested both on YUM and APT.
LPIC certifications are multiple choice, and really come down to rote memorization of flags. You're also tested on stuff of questionable relevance, like X11, desktop environments, and CUPS. If you're supporting Linux desktops, that stuff is probably important. But Linux deployed mostly on servers.
RHSA: RHEL/CentOS-only, and performance based. You can use man pages during the exam, so you can concentrate what commands do what and how to configure things. This is opposed to LPIC, where you're more focused on obscure flags.
Ubuntu has no vendor-specific exam. If you really want to stick with Debian/Ubuntu, go with the Linux Foundation certs. They're performance-based and you can choose to do it on Debian.
Wikipedia does a decent service, but its community is a toxic cesspool.
And I think one of the underlying issues with Wikipedia is its is community incredibly hostile to new editors. So any attempts by Wikipedia to correct for the bias toward white male editors is often undercut by its own community.
I find certifications good for really three things:
1.) Having a structured curriculum to learn something new. All my tech skills are self-taught, and it's useful to have a structured learning path.
2.) Validating your skills, especially when you're changing careers. I went from working in call centers to AWS Systems Architect/Linux SysAdmin by virtue of a couple of certs.
3.) Sometimes employers require certain certifications as a condition of employment (or continued employment). This one can be a bit sticky, though. Make sure those certifications make sense for the role. I can't tell you how many job listings I see wanting CompTIA A+. Unless you're applying to work for Geek Squad, you probably don't need an A+ cert (which asks things like 'What is RAM'? 'What is Bluray?').
If you want to get into Linux, getting a couple of certs won't hurt. Red Hat's certs are probably the most well-respected, but of course are centered around Red Hat Enterprise Linux (and by extension CentOS).
If you want a good cert path for Debian, go with the Linux Foundation certs. Linux Foundation's certs are less well-known, but also practical exams.
I would avoid LPIC and CompTIA Linux+ certs (NOTE: I am Linux+ and LPIC-1 certified). They are multiple choice exams and really emphasize based on rote memorization of command flags, which really isn't useful to be an actual Linux SysAdmin. Then's the last time you ran into a bzip2 archive? I can't remember the last time I did, but I still remember that tar xjf will unzip one. But, of course, if I did run into a bzip2 in the wild, I can just as easily read the tar man page. Thanks LPIC!
Now let's just make sure they don't replace employees with lower-paid contractors. I'm always suspicious when these minimum wage hikes don't talk about contractors.
Nah bruh. He's where he deserves to be. Just like the Sackler family, he aided and abetted the destruction of many families and actual death of many drug users.
I guess the first question is: What do you want to do with AWS?
Do you want to have a good understanding of the breadth of services, or do you want to learn how to leverage AWS to help in your development?
CSA will give you a good overview of the main services AWS offers: You'll learn about EC2, S3, VPC networking, security and access management, etc. You'll also learn about costing holistically, and how to make well-architected systems.
Certified Developer will give you a deeper dive into the development-centric aspects of AWS. You'll learn stuff like specific details about RDS and Dynamo DB (manage SQL and NoSQL databases, respectively), how to build CI/CD pipelines, ECS (Elastic Container Store), etc. It covers fewer products (but at a deeper level) than the CSA.
With the CSA you'll learn which use cases you'll want a relational DB or when you want to go NoSQL. You'll also learn what DB engines are available in RDS and Dynamo DB. With the Developer, you'll be asked more detailed stuff like read/write units, eventually vs. strongly consistent reads, how DB throughput is calculated, etc.
How to learn? AWS Whitepapers and ReInvent videos on Youtube are both free. Linux Academy has great courses on AWS. acloud.guru fills in some gaps Linux Academy may leave out, but overall I find acloud.guru to be less feature-rich and somewhat underwhelming.
A lot of people use Whizlabs for practice tests, but I've never used them.
I encourage getting AWS certified. The certifications are really hot right now, and it'll validate that you have at least the base knowledge. There's a lot of fakers out there, and AWS certification helps you overcome that hurdle somewhat.
Linux Academy is how I went from dude working at a call center for an insurance company to Linux SysAdmin/AWS SA interviewing for jobs at Fortune 500 companies and Amazon.
It only works regionally, but it's better than nothing.