bash print lines unique to one file
# Example usage using awk:
awk 'FNR==NR { b[$0] = 1; next } !b[$0]' input_file_1 input_file_2
# This command prints all lines of input_file_2 that aren't found in
# input_file_1 (i.e. lines that are unique to input_file_2). Another
# way of saying this is that this removes all lines of input_file_2
# that are found in input_file_1.
# It does this by first adding all unique lines of input_file_1 to an
# associative array, which works like a dictionary with a key value
# pair. Then each line of input_file_2 is compared against the array
# and if it isn't found in the array, it is printed.
# Note, change $0 to $# if you want to remove lines based on values in
# specific fields (which don't have to be the same in each file)
# Note, unlike some comm and diff commands, this solution doesn't require
# the files to be sorted. Are there any code examples left?
New code examples in category Shell/Bash
Relative searches
bash get unique lines from file
print unique lines in a file linux
bash cat unique lines
linux remove lines in one file from another
bash delete lines in file from other file
bash remove lines from file that are in another file
how to keep changes from one file but not another
bash exclude lines from one file into another file
linux find values not in
bash remove rows that are found in another file
bash print lines unique to one file
