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pv: edit page and add example (#16892)

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Fazle Arefin 2025-06-20 04:04:07 +10:00 • committed by GitHub
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pages/common/pv.md
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@ -9,11 +9,11 @@
- Measure the speed and amount of data flow between pipes (`--size` is optional):
`command1 | pv {{[-s|--size]}} {{expected_amount_of_data_for_eta}} | command2`
`{{command1}} | pv {{[-s|--size]}} {{expected_amount_of_data_for_eta}} | {{command2}}`
- Filter a file, see both progress and amount of output data:
`pv {{[-cN|--cursor --name]}} in {{big_text_file}} | grep {{pattern}} | pv {{[-cN|--cursor --name]}} out > {{filtered_file}}`
`pv {{[-cN|--cursor --name]}} in {{path/to/file.txt}} | grep {{pattern}} | pv {{[-cN|--cursor --name]}} out > {{path/to/filtered_file.txt}}`
- Attach to an already running process and see its file reading progress:
@ -21,8 +21,12 @@
- Read an erroneous file, skip errors as `dd conv=sync,noerror` would:
`pv {{[-EE|--skip-errors --skip-errors]}} {{path/to/faulty_media}} > image.img`
`pv {{[-EE|--skip-errors --skip-errors]}} {{path/to/faulty_media}} > {{path/to/image.img}}`
- Stop reading after reading specified amount of data, rate limit to 1K/s:
`pv {{[-L|--rate-limit]}} 1K {{[-S|--stop-at-size]}} {{maximum_file_size_to_be_read}}`
`pv {{[-L|--rate-limit]}} {{1K}} {{[-S|--stop-at-size]}} {{maximum_file_size_to_be_read}}`
- Calculate hash (MD5, SHA1, SHA256, etc) of a large file and show progress:
`pv {{path/to/file}} | {{sha256sum}}`