Sed
| Change double-spaces to single spaces | sed ‘s/ \+/ /g’ > redpine2.txt |
| Delete all lines in all text files of a directory which follow after the pattern “Retrieved from” | find -name ‘*.txt’ -exec sed -i ‘1,/Retrieved from/!d’ {} \; |
| Display subdirectories in a tree format | grep “:$” | sed -e ‘s/:$//’ -e ‘s/[^-][^\/]*\//—-/g’ -e ‘s/^//’ -e ‘s/-/|/’ |
| Generate shuffled list of five-letter words with no repetitions: | echo {a,i,o,u}{b,d,f,j,k,l,m,n,p,r,s,t,v,w,z}{a,i,o,u}{b,d,f,j,k,l,m,n,p,r,s,t,v,w,z}{a,i,o,u}|sed ‘s/ /\n/g’| shuf | tr ‘\n’ ‘ ‘ |
| List all the files in a large directory on a single line: | ls -1 | sed -e :a -e ‘$!N;s/\n/ \/ /;ta’ |
| List the unique words in a file | sed -e $’s/\t//g’ -e “s/[[:punct:]]\+//g” -e “s/./\L&/g” | tr ‘ ‘ \\n | sort | uniq |
| Prepend an asterisk to every line in a file | sed -ne ‘s/.*/* &/p’ enterprise.txt > enterprise2.txt |
| Remove tags from HTML file | sed -e :a -e ‘s/<[^<]*>/ /g;/</{N;s/\n/ /;ba;}’ CleanPosts.html |
Batch convert Wordstar-encoded files to text files
#!/bin/bash
for i in *;
do strings -a -n 1 "$i" | sed -e :a -e '$!N;s/\n/ /;ta' > "${i%%.*}.txt"
done
List all the files in a large directory on a single line:
ls -1 | sed -e :a -e ‘$!N;s/\n/ \/ /;ta’
Morse code
#!/bin/sed -rf s/.*/\U&/ s/$/\nA.-B-...C-.-.D-..E.F..-.G--.H....I..J.---K-.-L.-..M--N-.O---P.--.Q--.-R.-.S...T-U..-V...-W.--X-..-Y-.--Z--../ :a s/([A-Z])([^\n]*\n.*\1([-.]+))/\3 \2/ ta s/\n.*//
All the words in the Bible that come after “Thou shalt not”
cat kjv.txt | tr ‘[A-Z]’ ‘[a-z]’ | awk -F ‘thou shalt not ‘ ‘NF>1{ sub(/ .*/,””,$NF); print $NF }’ | sed ‘s/punct://g’ | sort | uniq
Terminal Cruise 