Cheat sheets, study guides, and practice tests built by engineers with real certifications.
MikroTik CLI commands are the terminal commands you type into RouterOS to set up a router. This free PDF gives you the working commands for DHCP, NAT, firewall rules, routing, bridging, VPN tunnels, failover and hotspot, each with a ping test from a practice lab.
FortiGate high availability (HA) joins two identical FortiGates into one cluster with the FortiGate Clustering Protocol (FGCP). One unit forwards traffic and the other waits, so a firewall failure doesn't take the network down. This free FortiGate HA setup and troubleshooting PDF gives you the CLI to build an active-passive pair, the five commands to…
The FortiGate CLI commands admins use most for access, interfaces, firewall policy checks, session/sniffer diagnostics, debug flow and IPsec VPN, taken from Fortinet's own troubleshooting reference.
The most common ports are 80 (HTTP), 443 (HTTPS), 22 (SSH), 21 (FTP), 25 (SMTP), 53 (DNS), 67 and 68 (DHCP), 110 (POP3), 143 (IMAP) and 3389 (RDP). This free PDF explains each one with its port number, how it works and a real example.
The core Huawei router commands for an AR lab are system-view, sysname, interface, ip address, ospf 1, display ip routing-table and save. This free PDF puts SSH, PPP with CHAP and OSPF area 0 in paste-ready order for two Huawei AR routers.
Fourteen network troubleshooting commands cover almost every connectivity problem you'll hit, on Windows, PowerShell or Linux. This free cheat sheet lists each one with its exact syntax, what the output actually means, and the order to run them in, so you stop guessing and start isolating the fault in minutes. Network Troubleshooting Tools You Already…
This free az-104 practice test gives you 25 real exam-style questions across 13 scenarios, matching the real AZ-104 exam pattern the official Microsoft Azure Administrator certification uses: a company environment, a set of requirements, then a multiple-choice question that only makes sense once you've read both. Every answer comes with an explanation, not just a…
Preview, then real change Terraform has 18 commands you'll actually use, and terraform import is the one people search for most. This terraform commands cheat sheet covers every one of them: what each does, the exact syntax, and the flags that matter, from terraform init on day one to terraform state mv when you refactor…
Running five docker run commands by hand every time you start a project gets old fast, and it's easy to typo a port or forget a flag. Docker Compose fixes that with one file and one command. This Docker Compose commands cheat sheet covers every command you'll use day to day, a real working docker-compose.yml,…
Most Dockerfile commands cheat sheets stop at FROM, RUN, and CMD, then leave you guessing the moment you need HEALTHCHECK or a multi-stage build. This page covers all 16 Dockerfile instructions you'll actually use in production, in the order Docker reads them, each with a working example. Copy the free PDF and keep it next…
Running a container is easy. Remembering the flag that keeps it alive after a crash, three months later, at 11pm, is the hard part. This Docker commands cheat sheet covers 70+ commands: containers, images, networking, volumes, cleanup, and the production flags (restart policies, resource limits, health checks) most cheat sheets skip entirely. Grab the PDF…
Studying for AWS Cloud Practitioner? Prepping for a Solutions Architect interview? Or just tired of re-opening the same AWS docs page for the third time this week? This AWS services cheat sheet covers the 9 services you'll actually touch first: IAM, VPC, EC2, S3, RDS, Lambda, DynamoDB, CloudWatch and CloudTrail, plus the cloud fundamentals underneath…
Need a Cisco commands cheat sheet that doesn't stop at the basics? This one covers over 200 IOS commands across switches and routers, grouped by topic so you're not hunting through a 12-page manual mid-lab. Hostnames and passwords. VLANs and trunking. OSPF, EIGRP and RIP. ACLs, NAT, DHCP, PPP and Frame Relay. If it's a…
Fourteen network troubleshooting commands cover almost every connectivity problem you'll hit, on Windows, PowerShell or Linux. This free cheat sheet lists each one with its exact syntax, what the output actually means, and the order to run them in, so you stop guessing and start isolating the fault in minutes. Network Troubleshooting Tools You Already…
Most Dockerfile commands cheat sheets stop at FROM, RUN, and CMD, then leave you guessing the moment you need HEALTHCHECK or a multi-stage build. This page covers all 16 Dockerfile instructions you'll actually use in production, in the order Docker reads them, each with a working example. Copy the free PDF and keep it next…
The FortiGate CLI commands admins use most for access, interfaces, firewall policy checks, session/sniffer diagnostics, debug flow and IPsec VPN, taken from Fortinet's own troubleshooting reference.
The most common ports are 80 (HTTP), 443 (HTTPS), 22 (SSH), 21 (FTP), 25 (SMTP), 53 (DNS), 67 and 68 (DHCP), 110 (POP3), 143 (IMAP) and 3389 (RDP). This free PDF explains each one with its port number, how it works and a real example.
Running five docker run commands by hand every time you start a project gets old fast, and it's easy to typo a port or forget a flag. Docker Compose fixes that with one file and one command. This Docker Compose commands cheat sheet covers every command you'll use day to day, a real working docker-compose.yml,…
MikroTik CLI commands are the terminal commands you type into RouterOS to set up a router. This free PDF gives you the working commands for DHCP, NAT, firewall rules, routing, bridging, VPN tunnels, failover and hotspot, each with a ping test from a practice lab.
FortiGate high availability (HA) joins two identical FortiGates into one cluster with the FortiGate Clustering Protocol (FGCP). One unit forwards traffic and the other waits, so a firewall failure doesn't take the network down. This free FortiGate HA setup and troubleshooting PDF gives you the CLI to build an active-passive pair, the five commands to…
The FortiGate CLI commands admins use most for access, interfaces, firewall policy checks, session/sniffer diagnostics, debug flow and IPsec VPN, taken from Fortinet's own troubleshooting reference.
The most common ports are 80 (HTTP), 443 (HTTPS), 22 (SSH), 21 (FTP), 25 (SMTP), 53 (DNS), 67 and 68 (DHCP), 110 (POP3), 143 (IMAP) and 3389 (RDP). This free PDF explains each one with its port number, how it works and a real example.
The core Huawei router commands for an AR lab are system-view, sysname, interface, ip address, ospf 1, display ip routing-table and save. This free PDF puts SSH, PPP with CHAP and OSPF area 0 in paste-ready order for two Huawei AR routers.
Fourteen network troubleshooting commands cover almost every connectivity problem you'll hit, on Windows, PowerShell or Linux. This free cheat sheet lists each one with its exact syntax, what the output actually means, and the order to run them in, so you stop guessing and start isolating the fault in minutes. Network Troubleshooting Tools You Already…
