Sed/uniq- 002du
From Get docs
7.19 Remove All Duplicated Lines
This script prints only unique lines, like ‘uniq -u
’.
#!/usr/bin/sed -f
# Search for a duplicate line --- until that, print what you find. $b N /^\(.*\)\n\1$/ ! { P D }
:c # Got two equal lines in pattern space. At the # end of the file we simply exit $d
# Else, we keep reading lines with N until we # find a different one s/.*\n// N /^\(.*\)\n\1$/ { bc }
# Remove the last instance of the duplicate line # and go back to the top D