Information I could find about EX442

Documentation that will most likely be on the exam:

https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/8/html/monitoring_and_managing_system_status_and_performance/index
https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/8/html/using_systemd_unit_files_to_customize_and_optimize_your_system/index

Script that downloads RHEL documentation in PDF format:

#!/usr/bin/bash

lang=en-US
ext=pdf
version=${1:-9}

function get_doc_urls() {
    local doc_list=(
        $( lynx -dump -listonly -nonumbers https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/$version/ | grep "$version/html" )
    )

    for url in ${doc_list[@]}; do
        local title=${url#*html/}
        local words=${title//_/ }

        local capitalized_title=''
        for w in $words; do
            # Use tr to capitalize first letter instead of ${w^}
            capitalized_title+="$(echo $w | cut -c1 | tr '[:lower:]' '[:upper:]')$(echo $w | cut -c2-)_"
        done

        # remove trailing slash
        capitalized_title=${capitalized_title/%_/}

        # append the rest
        capitalized_title=$capitalized_title-$lang

        # append extension
        capitalized_title=$capitalized_title.$ext

        # replace html in the url
        url=${url/html/pdf}

        # remove prefix
        url=${url##*https://}

        echo https://$url/$capitalized_title
    done
}

# download
wget2 -ci <( get_doc_urls )

You can use pdfgrep to parse it or feed it into an LLM.

RHEL 8 documentation (Monitoring_And_Managing_System_Status_And_Performance-en-US.pdf) summary from Gemini:

Okay, I've analyzed the "Monitoring and managing system status and performance" PDF, focusing on the tools mentioned within. Here's a breakdown of the tools and their page references:

• vmstat: This tool is not explicitly indexed.

• iostat: This tool is not explicitly indexed but is likely discussed within the context of I/O monitoring.

• mpstat: This tool is not explicitly indexed, but it would likely be discussed in the context of CPU performance monitoring.

• sar: The document mentions generating PCP archives from SADC archives on page 92.

• gnome-system-monitor: This tool is not explicitly mentioned in the PDF.

• top: page 154, 176

• powertop: pages 161, 162, 163, 164, 165, 166

• Performance Co-Pilot (PCP): 55, 56, 58, 62, 63, 64, 67, 71, 72, 73, 74, 77, 78, 79, 80, 81, 82, 83, 85, 86, 88, 91, 92, 93, 94, 95, 98, 99, 101, 102, 104, 105, 106, 107, 108, 109, 110, 112, 222

• dmesg: This tool is not explicitly indexed.

• dmidecode: This tool is not explicitly mentioned in the PDF.

• sosreport: This tool is not explicitly mentioned in the PDF.

• /proc/sys: This is discussed in the context of tuning network performance but is not explicitly indexed.

• sysctl: This is discussed in the context of tuning network performance but is not explicitly indexed.

• /sys: This is discussed in the context of tuning network performance but is not explicitly indexed.

• ps: This tool is not explicitly indexed.

• Valgrind: This tool is not explicitly mentioned in the PDF.

• SystemTap: This tool is mentioned on pages 347, 348, 349, 350, 351, 352

• eBPF: The document mentions SO_REUSEPORT_BPF on page 249, which is related to eBPF.

• Tuned: pages 13, 14, 15, 17, 18, 20, 21, 22, 23, 24, 25, 26, 28, 29, 30, 31, 32, 33, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 50, 121, 124, 125, 127, 128, 129, 233, 234, 236, 252

Based on this analysis of the RHEL 8 PDF, the tools that aren't mentioned are:

• iostat
• mpstat
• gnome-system-monitor
• dmidecode
• sosreport
• ps
• Valgrind

sysctl related information on the PDF

34.5.2 has information for net.ipv4.*
35.2 has information regarding vm.* arguments