T.Tian alchem0x2A

## Boot Into LiveCD from Grub.md

      
              1 file
            
          
              0 forks
            
          
              0 comments
            
          
              0 stars
            
          
                alchem0x2A
                / Boot Into LiveCD from Grub.md
            
            
              Last active
              July 6, 2023 20:26
                — forked from carlitoplatanito/Boot Into LiveCD from Grub
            
              
                Boot into a LiveCD from Grub when bootable CD or USB is broken on old PC
              
          
    Useful command when Alt+power fails in macbook installation

Determine the disk number

# Enter grub cmdline by pressing Right-Shift and c
grub> ls
(proc) (hd0) ...


## ffmpeg-compress-mp4
$ ffmpeg -i input.mp4 -vcodec h264 -acodec mp2 output.mp4

## compress-pdf-with-gs.md

      
              1 file
            
          
              0 forks
            
          
              0 comments
            
          
              0 stars
            
          
                alchem0x2A
                / compress-pdf-with-gs.md
            
            
              Created
              March 19, 2020 11:19
                — forked from guifromrio/compress-pdf-with-gs.md
            
              
                Compress PDF files with ghostscript
              
          
    This can reduce files to ~15% of their size (2.3M to 345K, in one case) with no obvious degradation of quality.
ghostscript -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/printer -dNOPAUSE -dQUIET -dBATCH -sOutputFile=output.pdf input.pdf

Other options for PDFSETTINGS:

/screen selects low-resolution output similar to the Acrobat Distiller "Screen Optimized" setting.
/ebook selects medium-resolution output similar to the Acrobat Distiller "eBook" setting.
/printer selects output similar to the Acrobat Distiller "Print Optimized" setting.
/prepress selects output similar to Acrobat Distiller "Prepress Optimized" setting.


## uninstall.sh
# Next time you need to install something with python setup.py -- which should be never but things happen.

python setup.py install --record files.txt

# This will cause all the installed files to be printed to that directory.
# Then when you want to uninstall it simply run; be careful with the 'sudo'

cat files.txt | xargs sudo rm -rf
	# Next time you need to install something with python setup.py -- which should be never but things happen.

	python setup.py install --record files.txt

	# This will cause all the installed files to be printed to that directory.
	# Then when you want to uninstall it simply run; be careful with the 'sudo'

	cat files.txt \| xargs sudo rm -rf