Update cheatsheets

tldr/katana

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# katana
+
+> A fast crawler focused on execution in automation pipelines offering both headless and non-headless crawling.
+> See also: `gau`, `scrapy`, `waymore`.
+> More information: <https://github.com/projectdiscovery/katana>.
+
+- Crawl a list of URLs:
+
+`katana -list {{https://example.com,https://google.com,...}}`
+
+- Crawl a [u]RL using headless mode using Chromium:
+
+`katana -u {{https://example.com}} -headless`
+
+- Use [p]a[s]sive sources (Wayback Machine, Common Crawl, and AlienVault) for URL discovery:
+
+`cat {{example.com}} | katana -passive`
+
+- Pass requests through a proxy (http/socks5) and use custom [H]eaders from a file:
+
+`katana -proxy {{http://127.0.0.1:8080}} -headers {{path/to/headers.txt}} -u {{https://example.com}}`
+
+- Specify the crawling [s]trategy, [d]epth of subdirectories to crawl, and rate limiting (requests per second):
+
+`katana -strategy {{depth-first|breadth-first}} -depth {{value}} -rate-limit {{value}} -u {{https://example.com}}`
+
+- Crawl a list of domains, each for a specific amount of seconds, and write results to an [o]utput file:
+
+`cat {{path/to/domains.txt}} | katana -crawl-duration {{value}} -output {{path/to/output.txt}}`

tldr/linux/blkpr

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# blkpr
+
+> Register, reserve, release, preempt, and clear persistent reservations on a block device that supports Persistent Reservations.
+> More information: <https://manned.org/blkpr>.
+
+- Register ([c]ommand) a new reservation with a given [k]ey on a given device:
+
+`blkpr {{-c|--command}} register --key {{reservation_key}} {{path/to/device}}`
+
+- Set the [t]ype of an existing reservation to exclusive access:
+
+`blkpr -c reserve -k {{reservation_key}} {{-t|--type}} exclusive-access {{path/to/device}}`
+
+- Preempt the existing reservation with a given [K]ey and replace it with a new reservation:
+
+`blkpr -c preempt {{-K|--oldkey}} {{old_key}} --key {{new_key}} -t write-exclusive {{path/to/device}}`
+
+- Release a reservation with a given [k]ey and [t]ype on a given device:
+
+`blkpr -c release --key {{reservation_key}} -t {{reservation_type}} {{path/to/device}}`
+
+- Clear all reservations from a given device:
+
+`blkpr -c clear -k {{key}} {{path/to/device}}`