KTRDUMP(8)

💅 KTRDUMP — bestie's guide to the ktrdump(8) manual page 🎀

okay so real quick: this is KTRDUMP(8), a System Manager's Manual situation, and it's literally the tool that prints kernel ktr trace buffer. that's the whole vibe. let's get into it ✨

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✨ NAME ✨

ktrdump — print kernel ktr trace buffer 🫶

🌸 SYNOPSIS 🌸

ktrdump [-cflqrtH] [-i ktrfile] [-M core] [-N system] [-o outfile]

💖 DESCRIPTION 💖

so the ktrdump utility is used to dump the contents of the kernel ktr trace buffer. that's it, that's the job, and it does it slayfully 👑

these are the options you can give it:

• -c — prints the CPU number that each entry was logged from. which-core energy fr 🧚
• -l — polls the kernel ktr trace buffer periodically, dumping any new events after each poll. it's giving "keep refreshing the feed" 💀
• -f — prints the file and line number that each entry was logged from. receipts included, no cap 📍
• -q — quiet mode; do not print the column header. minimalism era 🙈
• -r — prints relative timestamps rather than absolute timestamps. "3 seconds ago" vibes instead of a whole date ⏱️
• -t — prints the timestamp for each entry. time stamps on everything, main character documentation ✨
• -H — prints the thread ID for each entry. know exactly which thread was being chaotic 🧵
• -i ktrfile — file containing saved ktr trace events; for more information see the ktr(4) manual page. lowkey go read ktr(4), it's iconic 📖
• -N system — the kernel image to resolve symbols from. the default is the value returned via getbootfile(3). it knows where the kernel lives already, bestie 💅
• -M core — the core file or memory image to read from. the default is /dev/mem. classic default, we love her 🌈
• -o outfile — the file to write the output to. the default is standard output. so like, to the terminal, unless you say otherwise 🖥️

🦋 SEE ALSO 🦋

• ktr(4)
• ktr(9)

👑 HISTORY 👑

the ktrdump utility first appeared in FreeBSD 5.0. a true OG, periodt ⭐

🍓 AUTHORS 🍓

the ktrdump utility was implemented by Jake Burkholder <jake@FreeBSD.org>.

this manual page was written by Chad David <davidc@FreeBSD.org>.

both of them ate and left no crumbs, we simply must stan 💜

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and that's the whole page bestie!! this little beauty comes to you from Debian, dated October 22, 2018 — okay so it's a little vintage but vintage is literally iconic, iykyk 🎀✨💖