Geek Corner
My story
Hello, my name is Martin. Yes, that guy who fell in love with computers when he received his first 8-bit ZX Spectrum at 10 years old. It was in the early nineties but I had no idea how difficult will be to turn my hobby into a job and how much I will change from an introverted nerd with zero interest in human interaction into someone who believes there are more things to sort out. I did not even had a mobile phone because it was heavy and costed multiple times salary of my parents.
Stories
Python
- Python3: Drying Potatoes
- Python3: Letterbox Paint-Squad
- Python3: Sum of numerous arguments
- Python3: Get the Middle Character
- Python3: Reverse words
- Python3: Maximum Multiple (difficulty 7)
- Python3: Basic subclasses – Adam and Eve
- Python3: Form The Minimum
- Python3: Is n divisible by x and y?
- Python3: The Feast of Many Beasts
Linux
- Time synchronization and Chrony
- Nmcli and IPv6
- VirtualBox: How to simply mount shared folders
- Docker: How to set-up custom storage
- OpenVPN: internal network
- Monitoring – Icinga, Nagios
- AWS – why do I love it?
- Bash scripts – my opinion
- Do you really know ssh?
- Dante Socks proxy – how to install and manage on RHEL or other distros
Martin's technologies
Good
| VMWare (creating VMs, managing VMs, adding memory, cpus, remote console) |
| SaltStack (pull mode), Fabric (switched to ansible) |
| Windows 10 (advanced user, registry, backup, recovery, but really just user) |
| Routing (mainly static), Squid (regex routing), Application deployment (Tomcat) |
| Data centre (climatization, UPS, racking, HW evidence, etc…) |
| PHP (conditionals, loops, classes, regular expressions, templates - smarty) |
| Awk (few basic commands, print etc.), Sed (good regex knowledge), Vim |
| jBoss (Java), Java memory limits settings (Xms, etc.), JDK installation (also ansible automated) from tars |
| Bacula, Docker |
Better
| Apache (mod_rewrite, mod_ssl, reverse proxy), ntp (chrony, ntpdate), Bacula, Prometheus |
| AWS (Cloudwatch, AWS Cli, Clouformation, EC2, S3) |
| Python 2/3 (some OOP knowledge, pip) |
| Computer networks (TCP/IP, Ethernet, IPv4, subnetting, VLANs) |
| Bash (debug, conditionals, loops, one-liners, medium difficulty scripts) |
| VoIP (rtp, sip), datacenter management (cooling, humanity, fire safety), VirtualBox |
| Hardware (Oracle, Dell servers, storages - IBM, KVM concentrator) |
| Storage (iSCSI - connection to VMWare), parity disks, |
| Monitoring (Icinga, Nagios) |
Best
| Linux (Ubuntu, Redhat, derivatives...), SystemD (including writing own units, journalctl, rescue unit, etc.), SSH |
| Ansible (including writing plug-ins, roles, etc., really extensive knowledge) |
| RAID (SW - md utils, HW), HW maintanance (iLO, iDRAC, memory upgrades) |
| OpenVPN (tun, tap, point-to-point, subnet, certificate generation, udp, tcp) |
| MySQL replication (master/slave), galera, SQL (joins, subqueries), MariaDB |
| Virtualization (KVM, XEN, virt-install combined with kickstart), libvirt |
| Volume management (LVM, volume groups, logical volumes for KVM, etc...) |
| IPTables (in/output, forward, nat, dnat, log, accept, drop, reject), expect (mainly in python, alse bash, not much in original tcl/tk), ... |
