How to sort and compare files in more efficient manner?
Hello All,
Iam using below method to sort and compare files. First iam doing sorting and changing the same file and then doing comparing and taking the final result to another file.
Is their a more better or clear way of doing the above task.
Hi
I have a script to find and delete the files which are say, noDaysOld, I am interested to find the number of such files I am fniding for deleting and then deleting it.
So, the script I wrote, first finds the number of such files and then deletes, clearly this is two different steps.
... (3 Replies)
Dear All.
Im trying to know how exactly the command "compare" works, does it compare line by line or field by field, and the most important thing is that why the files have to be sorted before we compare them?
Thanks in advance (7 Replies)
Hi,
I have around 14-15 files and i want to sort all the files and then compare. I dont want to sort them and store in a different file and then compare. I want to compare two files at a time. Is there a way we can do this using a single command? (5 Replies)
Hi All
I have a flat text file. Each line in it contains a "/full path/filename". The last three columns are predictable, but directory depth of each line varies.
I want to sort on the last three columns, starting from the last, 2nd last and 3rd last. In that order. The last three columns... (6 Replies)
Hi,
I have two files say file 1 file 2
File1
1
2
4
5
File 2
asdf
adf
How to get the ouput something like
asdf1
adf1
asdf2
adf2
asdf4
adf4
asdf5 (5 Replies)
Hello,
Error
awk: Internal software error in the tostring function on TS1101?05044400?.0085498227?0?.0011041461?.0034752266?.00397045?0?0?0?0?0?0?11/02/10?09/23/10???10?no??0??no?sct_det3_10_20110516_143936.txt
What it is
It is a unix shell script that contains an awk program as well as... (4 Replies)
Hi there,
I had run into some fortran code to modify. Obviously, it was written without thinking of high performance computing and not parallelized... Now I would like to make the code "on track" and parallel. After a whole afternoon thinking, I still cannot find where to start. Can any one... (3 Replies)
Team,
I have two files and I am trying to find the lines unique to file1. So i have executed the below command at shell prompt and got the correct results
comm -23 <(sort test) <(sort test1)
When i run the same command in Bash shell script, i got the correct results.
But when i run... (5 Replies)
I have a list of files defined in a single file , one on each line.(No.of files may wary each time)
eg. content of ETL_LOOKUP.dat
/data/project/randomname
/data/project/ramname
/data/project/raname
/data/project/radomname
/data/project/raame
/data/project/andomname
size of these... (5 Replies)
is there a more efficient way to write the following code:
for eachlfile in $(ls -ltcrd ${BACKUPDIR}/${BACKUPNAME}*/content_${BACKUPNAME}* 2>/dev/null | awk '{print $NF}')
do
echo "=========================="
... (4 Replies)
Discussion started by: SkySmart
4 Replies
LEARN ABOUT OPENSOLARIS
comm
comm(1) User Commands comm(1)NAME
comm - select or reject lines common to two files
SYNOPSIS
comm [-123] file1 file2
DESCRIPTION
The comm utility reads file1 and file2, which must be ordered in the current collating sequence, and produces three text columns as output:
lines only in file1; lines only in file2; and lines in both files.
If the input files were ordered according to the collating sequence of the current locale, the lines written will be in the collating
sequence of the original lines. If not, the results are unspecified.
OPTIONS
The following options are supported:
-1 Suppresses the output column of lines unique to file1.
-2 Suppresses the output column of lines unique to file2.
-3 Suppresses the output column of lines duplicated in file1 and file2.
OPERANDS
The following operands are supported:
file1 A path name of the first file to be compared. If file1 is -, the standard input is used.
file2 A path name of the second file to be compared. If file2 is -, the standard input is used.
USAGE
See largefile(5) for the description of the behavior of comm when encountering files greater than or equal to 2 Gbyte ( 2^31 bytes).
EXAMPLES
Example 1 Printing a list of utilities specified by files
If file1, file2, and file3 each contain a sorted list of utilities, the command
example% comm -23 file1 file2 | comm -23 - file3
prints a list of utilities in file1 not specified by either of the other files. The entry:
example% comm -12 file1 file2 | comm -12 - file3
prints a list of utilities specified by all three files. And the entry:
example% comm -12 file2 file3 | comm -23 -file1
prints a list of utilities specified by both file2 and file3, but not specified in file1.
ENVIRONMENT VARIABLES
See environ(5) for descriptions of the following environment variables that affect the execution of comm: LANG, LC_ALL, LC_COLLATE,
LC_CTYPE, LC_MESSAGES, and NLSPATH.
EXIT STATUS
The following exit values are returned:
0 All input files were successfully output as specified.
>0 An error occurred.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWesu |
+-----------------------------+-----------------------------+
|CSI |enabled |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
SEE ALSO cmp(1), diff(1), sort(1), uniq(1), attributes(5), environ(5), largefile(5), standards(5)SunOS 5.11 3 Mar 2004 comm(1)