Commands by homoludens (7)
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0ls *.png | cut -d . -f 1 | xargs -L1 -i convert -strip -interlace Plane -quality 80 {}.png {}.jpg
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0find . -name *.png | xargs optipng -nc -nb -o7 -full
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0convert input.png -gravity NorthWest -background transparent -extent 720x200 output.png
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2find . -type f -exec chmod -x {} \;
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0ls *.JPG | cut -d . -f 1 | xargs -L1 -i convert -resize 684 {}.JPG {}.jpg
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recursive find and replace. important stuff are grep -Z and zargs -0 which add zero byte after file name so sed can work even with file names with spaces.
0grep -ZlRr -e BAD_SCRIPT_LINE * |xargs -0 sed -i 's/BAD_SCRIPT_LINE//g' -
Problem arises when ebuild gets removed from portage and you end up with old and unmaintained package that you cannot find standard way. This oneliner will give you list of those packages. Show Sample Output
0for f in $(qlist -IC); do stat /usr/portage/"$f" > /dev/null; done
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