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 in file2
(and find out which lines are missing, if any). It's probably important to note that while file1
has conveniently one search term per line, the terms can occur anywhere in the file2
including in the middle of a word. Also would help if the matching was case insensitive - doesn't matter if the text in file2
is even in all caps as long as it's there.
The lines in file1
include spaces and all sorts of other special characters like --
.
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
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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