Some linter fixes

• fix handler conditionals

• fix section1 linter errors

• fix section2 linter errors

• fix section3 linter errors

• fix section4 linter errors

• fix section5 linter errors

• fix section6 linter errors

• fix linter errors

• fix sed linter errors

• fix pipefail

• use literal + in lineinfile regex

• use not rather than !