I've got file A with (say) 1M lines in it ... ascii text, space delimited ...
I've got file B with (say) 10M lines in it ... same structure.
I want to remove any lines from A that appear (identically) in B and print the remaining (say) 900K lines. (And I want to do it in zero time of course!)
Best I've come up with so far is somehow marking the lines in A, then doing a sort and applying an awk script to the result so that the marked lines are only printed if the following (or previous) line isn't "identical" except for the mark.
But after 1000 years of shell programming I've GOT to believe I'm missing an easier/faster solution ... I'm using bash and cygwin tools - and compiling is not an option.
ADVthanksANCE for your help!
=Gneen
Not sure how fast that would be, but fileC will end up with all the lines that were in fileA that were in not in fileB.
I need help to parse a file where there are many records, all of which are consistently separated by lines containing “^=============” and "^ End of Report".
Example:
=============
1
2
3
4
End of record
=============
1
3
4
End of record
Etc....
I only need specific lines... (5 Replies)
Hi,
I have two files. 1st file has 1 column (huge file containing ~19200000 lines) and 2nd file has 2 columns (small file containing ~6000 lines).
#################################
huge_file.txt
a
a
ab
b
##################################
small_file.txt
a 1.5
b 2.5
ab ... (4 Replies)
hi,
i have two files.
file1.sh
echo "unix"
echo "linux"
file2.sh
echo "unix linux forums"
now the output i need is
$./file2.sh
unix linux forums (3 Replies)
I have a configuration file that contains hundreds of these chunks. Each "chunk" is the section that begins with "define service {" and ends with "}".
define service {
check_command check_proc!java
hostgroup_name
service_description ... (5 Replies)
I have a file that looks like this:
cat includes
CORP-CRASHTEST-BU
e:\crashplan\
CORP-TEST
/usr/openv/java
/usr/openv/logs
/usr/openv/man
CORP-LABS_TEST
/usr/openv/java
/usr/openv/logs
/usr/openv/man
What I want to do is make three new files with just those selections. So the three... (4 Replies)
I really can't figure this one out.
I have 2 files, one file is a list of hostnames and the other is a list of their corresponding IPs:
fileA:
example.com
another.org
thirdie.net
fileB:
1.1.1.1
2.2.2.2
3.3.3.3
I want to create a fileC that looks like:
example.com 1.1.1.1... (2 Replies)
Hello All,
this is my first post so I don't know if I am doing this right.
I would like to append entries from a series of strings (contained in a text file) consecutively at the end of specifically labeled lines in another file.
As an example:
- the file that contains the values to be... (3 Replies)
I have a bunch of file numbers in the file 'test':
I'm trying the above command to change all the instances of "H" to "Na+" in the file testsds.pdb at the line numbers indicated in the file 'test'. I've tried the following and various similar alternatives but nothing is working:
cat test |... (3 Replies)
HI,
I have 2 text files. file1 and file2.
file1.txt (There are no duplicates in this file)
1234
3232
4343
3435
6564
6767
1213
file2.txt
1234,wq,wewe,qwqw
1234,as,dfdf,dfdf
4343,asas,sdds,dsds
6767,asas,fdfd,fdffd
I need to search each number in file1.txt in file2.txt's 1st... (6 Replies)
I have a file where every line includes four expressions with a caret in the middle (plus some other "words" or fields, always separated by spaces). I would like to extract from this file, all those lines such that each of the four expressions containing a caret appears in at least four different... (9 Replies)
Discussion started by: uncleMonty
9 Replies
LEARN ABOUT ULTRIX
uniq
uniq(1) General Commands Manual uniq(1)Name
uniq - report repeated lines in a file
Syntax
uniq [-udc[+n][-n]] [input[output]]
Description
The command reads the input file comparing adjacent lines. In the normal case, the second and succeeding copies of repeated lines are
removed; the remainder is written on the output file. Note that repeated lines must be adjacent in order to be found. For further infor-
mation, see
Options
The n arguments specify skipping an initial portion of each line in the comparison:
-n Skips specified number of fields. A field is defined as a string of non-space, non-tab characters separated by tabs and spaces from its
neighbors.
+n Skips specified number of characters in addition to fields. Fields are skipped before characters.
-c Displays number of repetitions, if any, for each line.
-d Displays only lines that were repeated.
-u Displays only unique (nonrepeated) lines.
If the -u flag is used, just the lines that are not repeated in the original file are output. The -d option specifies that one copy of
just the repeated lines is to be written. The normal mode output is the union of the -u and -d mode outputs.
The -c option supersedes -u and -d and generates an output report in default style but with each line preceded by a count of the number of
times it occurred.
See Alsocomm(1), sort(1)uniq(1)