Newbie solo sysadmin looking for advice

Posted by Ironclad_Soldier@reddit | sysadmin | View on Reddit | 15 comments

I am terrified as it is overall my first job and afraid to be bottleneck to the company. I feel overwhelmed by things but at the same time they seem easy to handle, so i need advice on what to do and what i absolutely cannot do

By solo i mean the only IT guy that can solve network or somewhat complicated IT problems. Second best at IT support is my supervisor, she can deal with some problems but will not soon enough as it is not her responsibilty

By newbie i mean straight from the college, 4 years total for sysadmin degree. Zero experience

Office is small \~50 users. We're basically a call center selling partner's products with an actual voip system outsourced to Bitrix provider and partner's infrastructure

So my #1 responsibility is to maintain network and user's machines as well as resolving software failures. #2 responsibility is to make network scalable as it has no means of centralised management

Two weeks in and i have to automate WAN failover with a following IPsec site-to-site tunnel failover for our voip to work on WAN switch, fix rare VPS hosted mailcow saved mails disappearance and Bitrix mail client often fails to send while built-in SOGo have no issues

It seems manageable, only thing I feel doomed for some reason. It's probably from lack of knowledge, there's no confidence if you don't know enough about it, even though get a backup and try any fixes knowing you can recreate

My plan is to firefight while learning and documenting everything about this network, get a backup or a way to recreate everything that runs inside it. Only after make changes or make from scratch

Company for several years was hiring rookie sysadmins, every year one will resign and previous man was here only for 5 months before resignation. Some documentation is there but it's not flagged obsolete nor relevant

What did i miss? Any advice? How do i time my work hours?