tr -d '"' <kodyzemi_cz.csv | tail -n +2 | sort -t\; -k4,4 kodyzemi_cz.csv >/tmp/kody_s; tr -d '"' <countrycodes_en.csv | tail -n +2 | sort -t \; -k1,1 >/tmp/codes_s; comm -12 /tmp/kody_s /tmp/codes_s; rm /tmp/kody_s /tmp/codes_s
find -empty
find /usr/include -name "^std" -not -name "*.h$"