I had my first contact with Slackware Linux in 1995 and Linux is my primary desktop OS since 1996. In 2001, I achieved the SuSE Certified Linux Trainer Certification. I know various distributions, including SuSE, Redhat, Redhat Enterprise, Debian, Ubuntu and Oracle and I have experience administrating the most common services (see below).
| Field | Level |
|---|---|
| Apache webserver | ⬤⬤⬤⬤⬤ |
| Asterisk PBX | ⬤⬤⬤⬤⬤ |
| Bash | ⬤⬤⬤⬤⬤ |
| BIND | ⬤⬤⬤⬤⬤ |
| Filesystems (local, network) | ⬤⬤⬤⬤⬤ |
| Firewall (iptables) | ⬤⬤⬤⬤⬤ |
| ISC-DHCPD | ⬤⬤⬤⬤⬤ |
| MySQL / MariaDB | ⬤⬤⬤⬤⬤ |
| Network configuration | ⬤⬤⬤⬤⬤ |
| NGINX | ⬤⬤⬤⬤⬤ |
| Perl | ⬤⬤⬤⬤⬤ |
| SSH | ⬤⬤⬤⬤⬤ |
| Syslog (configuration, filtering, analysis) | ⬤⬤⬤⬤⬤ |
| System configuration | ⬤⬤⬤⬤⬤ |
| FreeRadius | ⬤⬤⬤⬤⬤ |
| Cisco TACACS+ | ⬤⬤⬤⬤⬤ |
| SNMP | ⬤⬤⬤⬤⬤ |
| Monitoring | ⬤⬤⬤⬤⬤ |
| InfluxDB | ⬤⬤⬤⬤⬤ |
| Grafana | ⬤⬤⬤⬤⬤ |
| Zabbix | ⬤⬤⬤⬤⬤ |