Differenze
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| Entrambe le parti precedenti la revisione Revisione precedente Prossima revisione | Revisione precedente | ||
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notes:linux.tips.and.tricks [02/11/2018 10:21] alez [PDF tools] |
notes:linux.tips.and.tricks [14/09/2023 10:31] (versione attuale) alez [Socat / YPort] |
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| ====== Linux Tips & Tricks ====== | ====== Linux Tips & Tricks ====== | ||
| + | ===== Bash tricks for manipulating files ===== | ||
| + | |||
| + | Move all files matching certain pattern from subdirectories in another single target folder: | ||
| + | <code>find . -iname '*.jpg' -exec mv {} ../target/ \;</code> | ||
| + | |||
| + | Remove all files matching certain pattern in here and in all subdirectories: | ||
| + | <code>find . -iname "*.poo" -exec rm -r "{}" \;</code> | ||
| + | |||
| + | Remove all empty subdirectories in here: | ||
| + | <code>find . -depth -type d -empty -exec rmdir "{}" \;</code> | ||
| + | |||
| ===== disk UUID's ===== | ===== disk UUID's ===== | ||
| Linea 14: | Linea 25: | ||
| ===== PDF tools ===== | ===== PDF tools ===== | ||
| + | |||
| + | Lower file-size (quality) of a pdf document | ||
| + | |||
| + | <code>gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/ebook -dNOPAUSE -dQUIET -dBATCH -sOutputFile=output.pdf input.pdf</code> | ||
| + | ''-dPDFSETTINGS=/screen'' for even lower size/quality | ||
| pdfjoin , no rotate | pdfjoin , no rotate | ||
| - | <code>pdfjoin --rotateoversize true</code> | + | <code>pdfjoin --rotateoversize false</code> |
| two a5 in one a4 | two a5 in one a4 | ||
| <code>pdfnup a5.pdf a5.pdf --nup '2x1' </code> | <code>pdfnup a5.pdf a5.pdf --nup '2x1' </code> | ||
| + | Note: ''pdfnup'' is part of ''texlive-extra-utils'' package | ||
| overlay a "draft" or other watermark... | overlay a "draft" or other watermark... | ||
| Linea 30: | Linea 47: | ||
| <code>gs -o output.pdf -sDEVICE=pdfwrite -sPAPERSIZE=a4 -dFIXEDMEDIA -dPDFFitPage -dCompatibilityLevel=1.4 input.pdf</code> | <code>gs -o output.pdf -sDEVICE=pdfwrite -sPAPERSIZE=a4 -dFIXEDMEDIA -dPDFFitPage -dCompatibilityLevel=1.4 input.pdf</code> | ||
| + | |||
| + | join and rotate | ||
| + | |||
| + | <code>pdfjam --outfile out.pdf --landscape --angle 90 input1.pdf input2.pdf</code> | ||
| ===== Reset keyboard ===== | ===== Reset keyboard ===== | ||
| Linea 64: | Linea 85: | ||
| See also [[http://nairobi-embedded.org/transfering_buildroot_fs_data_into_qemu_disk_images.html]] | See also [[http://nairobi-embedded.org/transfering_buildroot_fs_data_into_qemu_disk_images.html]] | ||
| + | |||
| + | ---- | ||
| ===== Socat / YPort ===== | ===== Socat / YPort ===== | ||
| + | |||
| + | |||
| + | ''socat -d -d pty,raw,echo=0 pty,raw,echo=0'' | ||
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| $ kill -USR1 $pid; sleep 1; kill $pid'' | $ kill -USR1 $pid; sleep 1; kill $pid'' | ||
| - | You can add “watch” to this one: | + | You can add "watch" to this one: |
| 1) find $pid for you dd process: | 1) find $pid for you dd process: | ||
| Linea 170: | Linea 196: | ||
| Someone suggested to give a look to http://www.ivarch.com/programs/pv.shtml | Someone suggested to give a look to http://www.ivarch.com/programs/pv.shtml | ||
| + | == Or: (definitely best solution) == | ||
| + | ''$ dd if=/dev/zero of=/dev/null& bs=1M status=progress'' | ||
| ===== rsync quick ref ===== | ===== rsync quick ref ===== | ||
