The text file is the king format of bioinformatics. Knowing how to wrangle the text files on the command line is critical.
I used to freak out when I got a huge txt file, but then I learned how to fire the terminal and use sed to either reformat the data or subset the data I want.
GNU sed is a non-interactive command-line text editor part of the GNU Project. It is commonly used to filter text, edit files in place, and make changes to multiple files simultaneously.
In this 24-page PDF file, you will learn sed by going through 12 essential lessons that you want to practice and use in your daily work.
A peek into the content: