AfNOG 2012 Workshop
Introduction to UNIX / Linux
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This is part of the AfNOG 2012 Workshop, held in conjunction with the AfNOG meeting in Serrekunda, The Gambia on May 6th 2012.
This one-day supplemental workshop is part of the AfNOG 2012 Workshop on Network Technology, held in conjunction with the AfNOG meeting in Serrekunda, The Gambia on May 6th 2012.
This course held for those students needing some intensive, hands-on training to introduce them to core UNIX operating system concepts as well as fundamental network concepts.
Topics covered include:
Who should attend: AfNOG 2012 attendees who are not proficient at with the use of the UNIX or Linux operating system and for those wishing for an introduction to fundamental networking.
Prerequisites: Basic computer experience.
SESSION I
Welcome:[PDF | PowerPoint]
Introduction to Unix: [PDF | PowerPoint]
- Some history
- Kernel, shell, processes
- Security model
- File System, Directory Hierarchy, files
Introduction to Commands: [PDF | PowerPoint]
- Command format
- Examples
- Pipes
- Command line power tools
- Editing the command line
- Copy/paste
- Auto-completion with tab
Lab: [PDF | TEXT]
SESSION II
Permissions in Unix: [PDF | PowerPoint]
- User, Group, Other
- Process permissions
- 'root' user
- Octal/Numeric vs. Symbolic mode
- Some special cases
(setuid/setgid/sticky bits)
- Inherited privileges
Lab: [PDF | TEXT]
Editing: [PDF | PowerPoint]
- Using vi (why?)
- Other editor options (ee, joe, pico, emacs, xemacs)
- vi modes
- vi tricks (search ,replace, movement)
- Editing configuration files
References: "Vi Quick Reference" [PDF]
"Vi Reference Card" [PDF]
Lab: [PDF | MS Word]
SESSION III-IV
TCP/IP Networking: [PDF | PowerPoint]
- Review the OSI layers
- Packet Headers
- Packets TCP, IP, UDP, ICMP
- IP Allocation Golden Rules
- Netmask calculations
- Gateway, network
- Default vs static routes
- Routing aggregation/supernetting
- Interface(s) configuration
- Route configuration
References: "Agreggation Tree" [PDF]
"Aggregation Tree - Example of Use" [PDF]
"Decimal - Hex - Binary - Conversion" [html | PDF]
"Golden Rules for Allocating IP Numbers" [html | PDF]
"IP Addressing" [html | PDF]
"Netmask Table" [html| PDF]
Lab: [PDF | TEXT]
ADDITIONAL SESSION (Time Permitting)
Network Performance Definitions & Metrics: [PDF | PowerPoint]
- Planning
- Common measurements: bps, pps, rtt, jitter, etc.
- Channel capacity and utilization
- 95th percentile
- end-to-end delay
- Types of delay
- Packet loss
- Flow control and congestion algorithms
- Common tools: mtr, netstat, lsof, tcpdump, tshark (wireshark), iptraf, iperf
Lab: [text]
Directory Listing of all files.