grep; Obtaining patterns from a file, Ignoring case
I'm quite unfamiliar with Unix, and I am trying to understand how to perform grep through a list of text files, using patterns stored in a text file called searchlist.txt. The text file is a new-line separated list of names that looks something like this:
"washington, martha"
"adams, jane"
And I need to search for these names in some very large text files. I also need to ignore case. I've come up with grep -i -f searchlist.txt *.txt, but the only output I am getting looks like this:
"adams, jane":"washington, martha"
I know for certain that these names are somewhere in the text files. I wonder if there is some specific way that searchlist.txt needs to be formatted? Is there some way I need to specify in the command that this list is separated by new lines?
grep
asked Jan 11 '17 at 20:38
user209924user209924
11
bumped to the homepage by Community♦ 14 hours ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
add a comment |
I'm quite unfamiliar with Unix, and I am trying to understand how to perform grep through a list of text files, using patterns stored in a text file called searchlist.txt. The text file is a new-line separated list of names that looks something like this:
"washington, martha"
"adams, jane"
And I need to search for these names in some very large text files. I also need to ignore case. I've come up with grep -i -f searchlist.txt *.txt, but the only output I am getting looks like this:
"adams, jane":"washington, martha"
I know for certain that these names are somewhere in the text files. I wonder if there is some specific way that searchlist.txt needs to be formatted? Is there some way I need to specify in the command that this list is separated by new lines?
grep
asked Jan 11 '17 at 20:38
user209924user209924
11
bumped to the homepage by Community♦ 14 hours ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
Does your text file include the double quote marks? If not, please remove them.
– roaima
Jan 11 '17 at 20:39
Did the file come from a Windows or Mac system? If so, please transfer it using text mode and try again. Or convert it from Windows/Mac format to Unix format.
– roaima
Jan 11 '17 at 20:39
These two fixes did the trick. Thank you very much!
– user209924
Jan 11 '17 at 20:47
add a comment |
I'm quite unfamiliar with Unix, and I am trying to understand how to perform grep through a list of text files, using patterns stored in a text file called searchlist.txt. The text file is a new-line separated list of names that looks something like this:
"washington, martha"
"adams, jane"
And I need to search for these names in some very large text files. I also need to ignore case. I've come up with grep -i -f searchlist.txt *.txt, but the only output I am getting looks like this:
"adams, jane":"washington, martha"
I know for certain that these names are somewhere in the text files. I wonder if there is some specific way that searchlist.txt needs to be formatted? Is there some way I need to specify in the command that this list is separated by new lines?
grep
asked Jan 11 '17 at 20:38
user209924user209924
11
I'm quite unfamiliar with Unix, and I am trying to understand how to perform grep through a list of text files, using patterns stored in a text file called searchlist.txt. The text file is a new-line separated list of names that looks something like this:
"washington, martha"
"adams, jane"
And I need to search for these names in some very large text files. I also need to ignore case. I've come up with grep -i -f searchlist.txt *.txt, but the only output I am getting looks like this:
"adams, jane":"washington, martha"
I know for certain that these names are somewhere in the text files. I wonder if there is some specific way that searchlist.txt needs to be formatted? Is there some way I need to specify in the command that this list is separated by new lines?
grep
grep
asked Jan 11 '17 at 20:38
user209924user209924
11
asked Jan 11 '17 at 20:38
user209924user209924
11
asked Jan 11 '17 at 20:38
user209924user209924
11
asked Jan 11 '17 at 20:38
user209924user209924
11
asked Jan 11 '17 at 20:38
user209924user209924
11
11
bumped to the homepage by Community♦ 14 hours ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
bumped to the homepage by Community♦ 14 hours ago
This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
Does your text file include the double quote marks? If not, please remove them.
– roaima
Jan 11 '17 at 20:39
Did the file come from a Windows or Mac system? If so, please transfer it using text mode and try again. Or convert it from Windows/Mac format to Unix format.
– roaima
Jan 11 '17 at 20:39
These two fixes did the trick. Thank you very much!
– user209924
Jan 11 '17 at 20:47
add a comment |
Does your text file include the double quote marks? If not, please remove them.
– roaima
Jan 11 '17 at 20:39
Did the file come from a Windows or Mac system? If so, please transfer it using text mode and try again. Or convert it from Windows/Mac format to Unix format.
– roaima
Jan 11 '17 at 20:39
These two fixes did the trick. Thank you very much!
– user209924
Jan 11 '17 at 20:47
Does your text file include the double quote marks? If not, please remove them.
– roaima
Jan 11 '17 at 20:39
Does your text file include the double quote marks? If not, please remove them.
– roaima
Jan 11 '17 at 20:39
Did the file come from a Windows or Mac system? If so, please transfer it using text mode and try again. Or convert it from Windows/Mac format to Unix format.
– roaima
Jan 11 '17 at 20:39
Did the file come from a Windows or Mac system? If so, please transfer it using text mode and try again. Or convert it from Windows/Mac format to Unix format.
– roaima
Jan 11 '17 at 20:39
These two fixes did the trick. Thank you very much!
– user209924
Jan 11 '17 at 20:47
These two fixes did the trick. Thank you very much!
– user209924
Jan 11 '17 at 20:47
add a comment |
1 Answer
1
active
oldest
votes
If you have a file called 'needles' containing the following:
washington, martha
adams, jane
And a file called 'haystack' containing the following:
blah blah blah washington, martha blah
all work and no play
makes adams, jane a dull
girl
You should be able to use grep -i -f needles haystack.
If, however, 'needles' contains:
"washington, martha"
"adams, jane"
you will need to use grep -i -f <(sed 's/"//g' needles) haystack to strip the double-quotes off of the names. Unless, that is, you want to search for only the names when quoted.
Naturally, this will not work for cases of 'haystack' such as
And on that day she changed her name to adams,
jane.
If someone on your list is inspired by The Artist Formerly Known As The Artist Formerly Known As Prince and has decided to put a double-quote into their actual name, you can make the sed a little more explicit and only strip the leading and trailing quote from each line with grep -i -f <(sed 's/^"//;s/"$//' needles) haystack.
answered Jan 11 '17 at 20:41
DopeGhotiDopeGhoti
44.2k55683
This is great, thank you. In addition to stripping quotes, I'd needed to convert the text file to Unix format. Thanks again.
– user209924
Jan 11 '17 at 20:57
add a comment |
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1 Answer
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1 Answer
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active
oldest
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votes
If you have a file called 'needles' containing the following:
washington, martha
adams, jane
And a file called 'haystack' containing the following:
blah blah blah washington, martha blah
all work and no play
makes adams, jane a dull
girl
You should be able to use grep -i -f needles haystack.
If, however, 'needles' contains:
"washington, martha"
"adams, jane"
you will need to use grep -i -f <(sed 's/"//g' needles) haystack to strip the double-quotes off of the names. Unless, that is, you want to search for only the names when quoted.
Naturally, this will not work for cases of 'haystack' such as
And on that day she changed her name to adams,
jane.
If someone on your list is inspired by The Artist Formerly Known As The Artist Formerly Known As Prince and has decided to put a double-quote into their actual name, you can make the sed a little more explicit and only strip the leading and trailing quote from each line with grep -i -f <(sed 's/^"//;s/"$//' needles) haystack.
answered Jan 11 '17 at 20:41
DopeGhotiDopeGhoti
44.2k55683
This is great, thank you. In addition to stripping quotes, I'd needed to convert the text file to Unix format. Thanks again.
– user209924
Jan 11 '17 at 20:57
add a comment |
If you have a file called 'needles' containing the following:
washington, martha
adams, jane
And a file called 'haystack' containing the following:
blah blah blah washington, martha blah
all work and no play
makes adams, jane a dull
girl
You should be able to use grep -i -f needles haystack.
If, however, 'needles' contains:
"washington, martha"
"adams, jane"
you will need to use grep -i -f <(sed 's/"//g' needles) haystack to strip the double-quotes off of the names. Unless, that is, you want to search for only the names when quoted.
Naturally, this will not work for cases of 'haystack' such as
And on that day she changed her name to adams,
jane.
If someone on your list is inspired by The Artist Formerly Known As The Artist Formerly Known As Prince and has decided to put a double-quote into their actual name, you can make the sed a little more explicit and only strip the leading and trailing quote from each line with grep -i -f <(sed 's/^"//;s/"$//' needles) haystack.
answered Jan 11 '17 at 20:41
DopeGhotiDopeGhoti
44.2k55683
This is great, thank you. In addition to stripping quotes, I'd needed to convert the text file to Unix format. Thanks again.
– user209924
Jan 11 '17 at 20:57
add a comment |
If you have a file called 'needles' containing the following:
washington, martha
adams, jane
And a file called 'haystack' containing the following:
blah blah blah washington, martha blah
all work and no play
makes adams, jane a dull
girl
You should be able to use grep -i -f needles haystack.
If, however, 'needles' contains:
"washington, martha"
"adams, jane"
you will need to use grep -i -f <(sed 's/"//g' needles) haystack to strip the double-quotes off of the names. Unless, that is, you want to search for only the names when quoted.
Naturally, this will not work for cases of 'haystack' such as
And on that day she changed her name to adams,
jane.
If someone on your list is inspired by The Artist Formerly Known As The Artist Formerly Known As Prince and has decided to put a double-quote into their actual name, you can make the sed a little more explicit and only strip the leading and trailing quote from each line with grep -i -f <(sed 's/^"//;s/"$//' needles) haystack.
answered Jan 11 '17 at 20:41
DopeGhotiDopeGhoti
44.2k55683
If you have a file called 'needles' containing the following:
washington, martha
adams, jane
And a file called 'haystack' containing the following:
blah blah blah washington, martha blah
all work and no play
makes adams, jane a dull
girl
You should be able to use grep -i -f needles haystack.
If, however, 'needles' contains:
"washington, martha"
"adams, jane"
you will need to use grep -i -f <(sed 's/"//g' needles) haystack to strip the double-quotes off of the names. Unless, that is, you want to search for only the names when quoted.
Naturally, this will not work for cases of 'haystack' such as
And on that day she changed her name to adams,
jane.
If someone on your list is inspired by The Artist Formerly Known As The Artist Formerly Known As Prince and has decided to put a double-quote into their actual name, you can make the sed a little more explicit and only strip the leading and trailing quote from each line with grep -i -f <(sed 's/^"//;s/"$//' needles) haystack.
answered Jan 11 '17 at 20:41
DopeGhotiDopeGhoti
44.2k55683
edited Jan 11 '17 at 20:47
answered Jan 11 '17 at 20:41
DopeGhotiDopeGhoti
44.2k55683
answered Jan 11 '17 at 20:41
DopeGhotiDopeGhoti
44.2k55683
answered Jan 11 '17 at 20:41
DopeGhotiDopeGhoti
44.2k55683
44.2k55683
This is great, thank you. In addition to stripping quotes, I'd needed to convert the text file to Unix format. Thanks again.
– user209924
Jan 11 '17 at 20:57
add a comment |
This is great, thank you. In addition to stripping quotes, I'd needed to convert the text file to Unix format. Thanks again.
– user209924
Jan 11 '17 at 20:57
This is great, thank you. In addition to stripping quotes, I'd needed to convert the text file to Unix format. Thanks again.
– user209924
Jan 11 '17 at 20:57
This is great, thank you. In addition to stripping quotes, I'd needed to convert the text file to Unix format. Thanks again.
– user209924
Jan 11 '17 at 20:57
add a comment |
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Does your text file include the double quote marks? If not, please remove them.
– roaima
Jan 11 '17 at 20:39
Did the file come from a Windows or Mac system? If so, please transfer it using text mode and try again. Or convert it from Windows/Mac format to Unix format.
– roaima
Jan 11 '17 at 20:39
These two fixes did the trick. Thank you very much!
– user209924
Jan 11 '17 at 20:47