See,

$ find . -name "*.sh" | xargs shellcheck -i SC2196

In ./roll-tarballs.sh line 163:
    sort "debian/patches/series" | grep -v '^#' | egrep "([0-9]+(_|-).*\.(full|full\+lite)\.patch)" | while read -r file
                                                  ^---^ SC2196: egrep is non-standard and deprecated. Use grep -E instead.

In ./roll-tarballs.sh line 200:
    sort "debian/patches/series" | grep -v '^#' | egrep "([0-9]+(_|-).*\.full\+lite\.patch)" | while read -r file
                                                  ^---^ SC2196: egrep is non-standard and deprecated. Use grep -E instead.

For more information:
  https://www.shellcheck.net/wiki/SC2196 -- egrep is non-standard and depreca...
Signed-off-by: Mario Trangoni <mjtrangoni@gmail.com>