Check if all lines from one file are present somewhere in another file

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北海茫月
北海茫月 2021-02-07 23:35

I used file1 as a source of data for file2 and now I need to make sure that every single line of text from file1 occurs somewhere

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  • 2021-02-07 23:50

    You can try

    awk -f a.awk file1 file2
    

    where a.awk is

    BEGIN { IGNORECASE=1 }
    NR==FNR {
        a[$0]++
        next
    }
    {
        for (i in a) 
            if (index($0,i)) 
                delete a[i]
    }
    
    END {
        for (i in a)
            print i
    }
    
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  • 2021-02-07 23:59
    if grep -Fqvf file2 file1; then
        echo $"There are lines in file1 that don’t occur in file2."
    fi
    

    Grep options mean:

    -F, --fixed-strings       PATTERN is a set of newline-separated fixed strings
    -f, --file=FILE           obtain PATTERN from FILE
    -v, --invert-match        select non-matching lines
    -q, --quiet, --silent     suppress all normal output
    
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