find difference between two text files with one item per line

bash file scripting sed awk
vehomzzz picture vehomzzz · Nov 2, 2010 · Viewed 162.2k times · Source

I have two files:

file 1

dsf
sdfsd
dsfsdf

file 2

ljljlj 
lkklk 
dsf
sdfsd
dsfsdf

I want to display what is in file 2 but not in file 1, so file 3 should look like

ljljlj 
lkklk

Answer

dogbane picture dogbane · Nov 2, 2010 
grep -Fxvf file1 file2

What the flags mean:

-F, --fixed-strings
              Interpret PATTERN as a list of fixed strings, separated by newlines, any of which is to be matched.    
-x, --line-regexp
              Select only those matches that exactly match the whole line.
-v, --invert-match
              Invert the sense of matching, to select non-matching lines.
-f FILE, --file=FILE
              Obtain patterns from FILE, one per line.  The empty file contains zero patterns, and therefore matches nothing.

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