Uncomment a line with sed (i.e. delete #)
$ sed -i '/<pattern>/s/^#//' file.txt
will uncomment a line where # is the first character.
$ sed -i '/<pattern>/s/^ *#//' file.txt
will uncomment a line where there is a white space before #.
To learn more about sed see:
I do self-funded research and I'm writing a book.
> What's the book about?
About technologies and epistemology.
Meaning, technologies can foster agency. No doubt. But I am also asking:
Can technologies make us blind?
I posted a summary of the prologue on the homepage: https://yctct.com/