1 cat story.txt 2 grep it story.txt 3 grep [Ii]t story.txt 4 cat story.txt 5 grep s. story.txt 6 grep s.* story.txt 7 grep s* story.txt 8 echo s* story.txt 9 echo 's*' story.txt 10 grep 's*' story.txt 11 grep 's.*' story.txt 12 cat story.txt 13 grep 't' story.txt 14 grep '^t' story.txt 15 grep '.$' story.txt 16 grep '\.$' story.txt 17 cat story.txt 18 sed -e 's/time/TIME/g' story.txt 19 sed 's+a+A+g' story.txt 20 sed -e 's/$/- /' story.txt 21 sed -e '1,5s/^/>>> /' story.txt 22 sed -e '/t/s/$/!/' story.txt 23 sed -e '/^$/s//as;lkjdfaslkdfja/' story.txt 24 cat story.txt 25 sed -e '/^$/d' story.txt 26 cat politicians 27 sed 's|\(.*\), \(.*\)|\2 \1|' politicians 28 sed 's|\(.*\), \(.*\)|\2 \2 \2 \1|' politicians 29 sed -e 's|\(.*\)\(.*\)|\1 \1 \2 \2 \2|' politicians 30 sed -e 's|\(.*\) \(.*\)|\1 \1 \2 \2 \2|' politicians 31 history > lec6.history