Shortcut Forwarding Engine

Shortcut is an in-Linux-kernel IP packet forwarding engine. It’s designed to offer very high speed IP packet forwarding based on IP connection tracking. On DD-WRT, SFE is listed under Setup->Basic Setup->WAN Setup-> Optional Settings. SFE reduces CPU utilisation as it bypasses unnecessary firewall checks once a connection has been established. Some users report that enabling … Read more

Gifsicle Flags, Example, Help [GIF Optimizer]

gifsicle –help ‘Gifsicle’ manipulates GIF images. Its most common uses include combining single images into animations, adding transparency, optimizing animations for space, and printing information about GIFs. Usage: gifsicle [OPTION | FILE | FRAME]… Mode options: at most one, before any filenames. -m, –merge Merge mode: combine inputs, write stdout. -b, –batch Batch mode: modify … Read more

Google-Certificates-Bridge User Agent .well-known/acme-challenge Requests

I recently have been having many requests coming from Google IPv4 and IPv6 addresses with the user agent “Google-Certificates-Bridge” accessing unique files within /.well-known/acme-challenge/XXXX. A snippet from my Apache Log 64.233.172.141 – – [25/Dec/2018:23:30:30 +0000] “GET /.well-known/acme-challenge/LjaR-XXXXXXXXXXXXX-lgf6-QW8 HTTP/1.1” 404 – “-” “Google-Certificates-Bridge” 64.233.172.145 – – [25/Dec/2018:23:30:40 +0000] “GET /.well-known/acme-challenge/LjaR-XXXXXXXXXXXXX-lgf6-QW8 HTTP/1.1” 404 – “-” “Google-Certificates-Bridge” 64.233.172.143 … Read more

uudecode flags / help / command example

ubuntu@gd:~$ uudecode –help uudecode (GNU sharutils) – decode an encoded file Usage: uudecode [ – [] | –[{=| }] ]… […] -o, –output-file=str direct output to file -c, –ignore-chmod ignore fchmod(3P) errors -v, –version[=MODE] output version information and exit -h, –help display extended usage information and exit -!, –more-help extended usage information passed thru pager … Read more

Using Google Service Accounts instead of End-User Accounts on a Server

If you are receiving the following message from a Google API or software tool, you are being warned for using your personal/business google account to run server-based applications. UserWarning: Your application has authenticated using end user credentials from Google Cloud SDK. We recommend that most server applications use service accounts instead. If your application continues … Read more

VIM Stuck! E388: Couldn’t find definition

Simply hit escape and enter the following command to fix: :!reset If this doesn’t get you back to normal, you’ll have to exit your current SSH session and re-open the session in a new window. This error happened to me after I mistakenly hit [command] + R when trying to redo instead of [control] + … Read more

svgcleaner flags / usage

USAGE: svgcleaner –apply-transform-to-gradients –apply-transform-to-paths –apply-transform-to-shapes –convert-segments –convert-shapes –coordinates-precision –group-by-style –indent –join-arcto-flags –join-style-attributes –list-separator –merge-gradients –paths-coordinates-precision –paths-to-relative –properties-precision –regroup-gradient-stops –remove-comments –remove-declarations –remove-default-attributes –remove-desc –remove-dupl-cmd-in-paths –remove-dupl-fegaussianblur –remove-dupl-lineargradient –remove-dupl-radialgradient –remove-gradient-attributes –remove-invalid-stops –remove-invisible-elements –remove-metadata –remove-needless-attributes –remove-nonsvg-attributes –remove-nonsvg-elements –remove-text-attributes –remove-title –remove-unreferenced-ids –remove-unresolved-classes –remove-unused-coordinates –remove-unused-defs –remove-unused-segments –remove-version –remove-xmlns-xlink-attribute –resolve-use –simplify-transforms –transforms-precision –trim-colors –trim-ids –trim-paths –ungroup-defs –ungroup-groups –use-implicit-cmds For more information try … Read more

Installing Tesseract Languages

For ocrmypdf or just general tesseract work, you may need to install language packages, depending on the languages you are working in.   ERROR – The installed version of tesseract does not have language data for the following requested languages: run the command tesseract –list-langs Error opening data file /usr/local/share/tessdata/eng.traineddata Please make sure the TESSDATA_PREFIX environment … Read more