algorithm 1 book-review 1 career 1 cheatsheet 3 command-line 8 coreutils 1 corner case 1 curated-resources 2 debugging 3 ebook 7 ebook-generation 1 epub 1 examples 2 fixed-string 2 gnu-awk 2 gnu-grep 2 gnu-sed 3 gui 1 intermediate 1 javascript 2 linux 4 lookarounds 1 markdown 1 maths 1 mawk 1 multiline 2 pandoc 1 pdf 1 perl 4 projects 1 python 9 re-module 2 regex-module 1 regular-expressions 12 ripgrep 3 ruby 1 sd 1 shell scripting 1 substitution 2 text-processing 1 tutorial 1 wxpython 1 xelatex 1