Note that with 20 fields on each of 3,000 input records being combined into 200 output lines, your average output lines with have 300 fields and some lines could have many more. You don't give us any indication of what system you're using, nor of the contents of most of the input fields. The awk utility and most editors are only defined to work on text files, and by definition, lines in a text file can't be longer than LINE_MAX bytes (including the terminating newline character). (Try:
to determine the value of LINE_MAX on your system. The standards only require that implementations support lines up to 2,048 bytes per line.) Are you sure that none of your output lines exceed LINE_MAX?
If you ask awk to print a line that is longer than LINE_MAX bytes long, the results are unspecified. If you use ed, ex, grep, sed, vi (or any of LOTS of other standard utilities that are described as processing text files) to read or write or create internal lines longer than LINE_MAX bytes long, the results are unspecified. There are very few standard text processing utilities that are defined to work on lines with arbitrary lengths (cut, fold, and paste).
Can some-one give me a view to this :
I have a directory in an unix server, having permissions r-xr-xr-x .This directory is basically a source directory.
Now there is another directory basically the destination directory which has all the permissions.
Note:I log in as not the owner,but user... (5 Replies)
$ echo a.bc | sed -e "s/\|/\\|/g"
|a|.|b|c|
$
Is the behavior of the sed statement expected ? Or is this a bug in sed ?
OS details
Linux 2.6.9-55.0.0.0.2.ELsmp #1 SMP Wed May 2 14:59:56 PDT 2007 i686 i686 i386 GNU/Linux (8 Replies)
Hi All,
I got a strange problem here. I have a perl script which is fetching data from a database table and writing a file with that data.
If i run that script from linux command line, the file it creates is a normal ascii text file without any binary character in it.But... (9 Replies)
Hello,
I was trying to identify lines who has a word of the following pattern "xyyx" (where x, and ys are different characters).
I was trying the following grep -
egrep '(\S)()\2\1'
This pattern do catches the wanted pattern, but it also catches "GGGG" or "CCCC" patterns. I was trying to... (5 Replies)
Hi,
We have a problem where occasionally an ssh will hang for no apparent reason preventing the rest of the script continuing. To deal with this I am trying to write a wrapper script to kill a hung ssh command after a specified period.
The scripts use a sleep command running in the... (2 Replies)
Hi,
Today I have found the following case in perl:
print "length:$lengths\tsum:". $count{$lengths}+$count_pair{$lengths}."\tindi:$count{$lengths}\t$count_pair{$lengths}\n";This give output as That means the first part of print is not printing. Only the values after the additions are printed.... (5 Replies)
Can someone please explain the strange behaviour.. I was just trying a few things to learn awk..
in the below code when I start the braces in the same line, the output is as expected, when I start at next line, output is displayed twice.
Please see the file, code I tried and output below.
... (2 Replies)
Hello All,
I have a text file containing output from a command that contains lots of escape/control characters that when viewed using vi or view, looks like jibberish. But when viewed using the cat command the output is formatted properly.
Is there any way to take the output from the cat... (7 Replies)
Discussion started by: mrm5102
7 Replies
LEARN ABOUT MOJAVE
comm
COMM(1) BSD General Commands Manual COMM(1)NAME
comm -- select or reject lines common to two files
SYNOPSIS
comm [-123i] file1 file2
DESCRIPTION
The comm utility reads file1 and file2, which should be sorted lexically, and produces three text columns as output: lines only in file1;
lines only in file2; and lines in both files.
The filename ``-'' means the standard input.
The following options are available:
-1 Suppress printing of column 1.
-2 Suppress printing of column 2.
-3 Suppress printing of column 3.
-i Case insensitive comparison of lines.
Each column will have a number of tab characters prepended to it equal to the number of lower numbered columns that are being printed. For
example, if column number two is being suppressed, lines printed in column number one will not have any tabs preceding them, and lines
printed in column number three will have one.
The comm utility assumes that the files are lexically sorted; all characters participate in line comparisons.
ENVIRONMENT
The LANG, LC_ALL, LC_COLLATE, and LC_CTYPE environment variables affect the execution of comm as described in environ(7).
EXIT STATUS
The comm utility exits 0 on success, and >0 if an error occurs.
SEE ALSO cmp(1), diff(1), sort(1), uniq(1)STANDARDS
The comm utility conforms to IEEE Std 1003.2-1992 (``POSIX.2'').
The -i option is an extension to the POSIX standard.
HISTORY
A comm command appeared in Version 4 AT&T UNIX.
BUGS
Input lines are limited to LINE_MAX (2048) characters in length.
BSD January 26, 2005 BSD