Understanding ed will let you understand all that feels strange about the system. It set the standards for sed and vi. ed was designed for real terminals, i.e. a typewriter. You would type a command to the computer, and it would type out any errors. It would not waste paper, ink, and time by typing out COMMAND RUN …

Read More

Combine many recfiles of different types into one 1sed '1i\ ' *.rec > all.rec Combine many recfiles of the same type into one 1recinf -d -t ${type} ${one}.rec > ${all}.rec 2sed '/^%/d' ${one}.rec ${two}.rec > all.rec The strange syntax used by sed only makes sense after using ed

Read More