Useful Tools (and Cool Stuff)

Every once in a while, I find and/or write some tool that makes life easier for me in one way or another and add it here. Plus, sometimes I find some cool snippets of code and figure, "Why not put 'em here?" I'd appreciate any suggestions you may have, by the way.

• You should be using SuperGenPass to make "passwording" easier online. For a guarantee of security, I'd recommend the mobile version.
• Hide your email address from spam bots
• My Linux bash aliases.
• My vim .vimrc.
• To combine several PDFs into one:

$ gs -dBATCH -dNOPAUSE -q -sDEVICE=pdfwrite -sOutputFile=output.pdf file1.pdf file2.pdf

• To split a PDF:

$ gs -dBATCH -dNOPAUSE -q -sDEVICE=pdfwrite -dFirstPage=m -dLastPage=n -sOutputFile=out.pdf in.pdf

• To rotate a PDF counterclockwise by 90 degrees:

$ pdftk in.pdf cat 1-endwest output out.pdf

• To list duplicate files by hash:

$ find -not -empty -type f -printf "%s\n" | sort -rn | uniq -d | xargs -I{} -n1 find -type f -size {}c -print0 | xargs -0 md5sum \ | sort | uniq -w32 --all-repeated=separate

• To convert a LaTeX document to ODT and DOCX:

$ latex2html in.tex -split 0 -no_navigation -info "" -address "" -html_version 4.0,unicode $ libreoffice --headless --convert-to odt:"OpenDocument Text Flat XML" in/index.html $ libreoffice --headless --convert-to docx:"MS Word 2007 XML" in/index.html

• To rotate a video clockwise 90 degrees:

$ ffmpeg -i <input_video> -vf "transpose=1" -r 30 -sameq <output_video>

• To force a file system check on reboot (and reboot):

$ sudo touch /forcefsck $ sudo shutdown -r now

• To mount ISOs:

$ sudo mount -o loop -t iso9660 /path/to/file.iso /path/to/mount_point

• To make a color in an image transparent using ImageMagick:

$ convert -transparent "#hex_color" input_file output_file

• To prevent key passphrases to be continuously prompted for in ssh sessions (once logged in via ssh):

$ exec ssh-agent bash $ ssh-add