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linux remove lines from one file in another Code Example
linux remove lines from one file in another 
If the files are sorted:

comm -23 file1 file2

-23 suppresses the lines that are in both files, or only in file 2. 
If the files are not sorted, pipe them through sort first...
Source: stackoverflow.com
linux remove lines from file 
grep -v "pattern" file > temp && mv temp file
Source: stackoverflow.com



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Horje