Command Line

Learn the purpose of some of the basic command-line tools and how to use them.

15 videos  //  139 minutes of training

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Course description

This course highlights some of the features on command-line utilities available on most distributions and how to use those tools for testing the web server state, performing transactions, finding and extracting info from the logs, generating basic reports, and if required, decoding the data from various formats. You’ll also review some of the CyberChef web application capabilities related to visualizing and decoding data.

Course syllabus

curlDuration: 11:11

Basic curl usage and common use cases.

OpenSSLDuration: 9:08

Basic OpenSSL usage and common use cases.

grep and egrepDuration: 8:02

Basic grep and egrep usage and common use cases.

awkDuration: 9:53

Basic awk usage and common use cases.

jqDuration: 8:04

Basic jq usage and common use cases.

cutDuration: 6:09

Basic cut usage and common use cases.

sortDuration: 8:08

Basic sort usage and common use cases.

Summarizing EventsDuration: 20:03

Basic event summarization from the web server logs.

ss and netstatDuration: 6:01

Basic ss and netstat usage and common use cases.

tcpdumpDuration: 10:12

Basic tcpdump usage and common use cases.

testssl.shDuration: 7:02

Basic testssl.sh usage and common use cases.

base64Duration: 7:39

Basic base64 usage and common use cases.

hexdump and xxdDuration: 3:56

Basic hexdump and xxd usage and common use cases.

gzipDuration: 13:18

Basic gzip usage and common use cases.

CyberChefDuration: 9:50

Basic CyberChef usage and common use cases.

Meet the author

Manuel Leos Rivas

LinkedIn

Manuel earned a bachelor’s degree in Business Administration and Computer Systems Engineering at the Universidad Autonoma de Nuevo Leon in Mexico and a Master of Sciences in Information Security Engineering with focus on Incident Response at the SANS Technology Institute. He holds around 40 cybersecurity-related certifications.

He started working full-time in the information security field in early 2000. Since 2012, Manuel has worked as a security expert, including supporting over a thousand WAFs to protect a variety of web applications. Starting in 2016, Manuel committed part of his personal time to improve the OWASP ModSecurity Core Rule Set, becoming an active rule developer. Since then he has contributed numerous new rules, fixed false positives and false negatives and assisted with many other improvements.

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