2022-06-28 18:39:45 +02:00
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---
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2022-07-07 08:32:34 +02:00
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title: 'Useful Commands'
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2022-06-28 18:39:45 +02:00
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---
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[toc]
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## Imagemagick
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### Splitting PDF files
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`$ convert -density 600 (input.pdf) -crop 50x100% +repage (out.pdf)`
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```
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-density: adjusts the quality of the resulting pdf. Higher values look better, but take longer to process
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-crop 50x100%: this splits the pdf into "left" and "right". 100x50% would split into "top" and "bottom"
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2022-07-07 08:35:48 +02:00
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```
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## Find
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### Change filtered permissions
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Using find with its `exec` switch one can set different permissions based on the usual find filters.
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One example would be only changing file or directory permissions.
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`$ find (directory) -type f -exec chmod 744 {} +`
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Replacing `-type f` with `-type d` would execute the `chmod` for directories instead.
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