cat old_filename | tr -cs A-Za-z '\012' > new_filenameThe following lists all words in filename in alphabetical order.
cat filename | tr -cs A-Za-z '\012' | tr A-Z a-z | sort | uniqYou can find out when the file .rhosts was last modified by typing
echo .rhosts last modified on `/bin/ls -l .rhosts | cut -c33-44`Typing head -n displays the first n lines of a file. And typing last lists the last logins.
grep '^...............$' /usr/share/dict/words | grep -v '\(.\).*\1'returns all the words in /usr/share/dict/words that are fifteen letters long and do not contain the same letter twice.
grep 'a[^aeiou]*e[^aeiou]*i[^aeiou]*o[^aeiou]*u' /usr/share/dict/wordsreturns all the words in /usr/share/dict/words that contain all of the vowels in the correct order.
© 1993-1998 Christopher C. Taylor