04-13-2012
The nawk in post #1 and the sort in post #2 give different results on my system. This is because the nawk always keeps the first of the duplicate key records but the sort selects a random one.
Shell tools were never designed to process multi-gigabyte files. Do you have a database engine and access to a programmer?
This User Gave Thanks to methyl For This Post:
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hey Guys,
I have file which looks like this,
Contig201#numbPA
Contig1452#nmdynD6PA
dm022p15.r#CG6461PA
dm005e16.f#SpatPA
IGU001_0015_A06.f#CG17593PA
I need to remove duplicates based on the chracter matching upto '#'.
for example if we consider this..
Contig201#numbPA... (4 Replies)
Discussion started by: sharatz83
4 Replies
2. Shell Programming and Scripting
Hello,
I have two files. File1 or the master file contains two columns separated by a delimiter:
a=b
b=d
e=f
g=h
File 2 which is the file to be processed has only a single column
a
h
c
b
What I need is an awk script to identify unique names from file 2 which are not found in the... (6 Replies)
Discussion started by: gimley
6 Replies
3. Shell Programming and Scripting
Hello,
I have a large amount of data with the following structure:
Word=Transliterated word
I have written a Perl Script (reproduced below) which goes through the full file and identifies all dupes on the right hand side. It creates successfully a new file with two headers: Singletons and Dupes.... (5 Replies)
Discussion started by: gimley
5 Replies
4. Shell Programming and Scripting
Hi,
I have a file that is 430K lines long. It has records like below
|site1|MAP
|site2|MAP
|site1|MODAL
|site2|MAP
|site2|MODAL
|site2|LINK
|site1|LINK
My task is to count the number of time MAP, MODAL, LINK occurs for a single site and write new records like below to a new file
... (5 Replies)
Discussion started by: reach.sree@gmai
5 Replies
5. Shell Programming and Scripting
Hi i want to fetch 100k record from a file which is looking like as below.
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
... (17 Replies)
Discussion started by: lathigara
17 Replies
6. Shell Programming and Scripting
Hi,
I have a file which looks like:ke this : chr1 11127067 11132181 89 chr1 11128023 11128311 chr1 11130990 11131025 chr1 11127067 11132181 89 chr1 11128023 11128311 chr1 11131583... (22 Replies)
Discussion started by: Amit Pande
22 Replies
7. Shell Programming and Scripting
Hello,
I have a very large dictionary file which is in text format and which contains a large number of sub-sections. Each sub-section starts with the following header :
#DATA
#VALID 1
and ends with a footer as shown below
#END
The data between the Header and the Footer consists of... (6 Replies)
Discussion started by: gimley
6 Replies
8. UNIX for Advanced & Expert Users
I'm trying to remove duplicate data from an input file with unsorted data which is of size >50GB and write the unique records to a new file.
I'm trying and already tried out a variety of options posted in similar threads/forums. But no luck so far..
Any suggestions please ?
Thanks !! (9 Replies)
Discussion started by: Kannan K
9 Replies
9. Shell Programming and Scripting
Dear all,
I have a large dictionary database which has the following structure
source word=target word
e.g.
book=livre
Since the database is very large in spite of all the care taken, it so happens that at times the source word is repeated
e.g.
book=livre
book=tome
Since I want to... (7 Replies)
Discussion started by: gimley
7 Replies
10. Shell Programming and Scripting
I am trying to remove whitespaces from a file containing sample data as:
457 <EOFD> Mar 1 2007 12:00:00:000AM <EOFD> Mar 31 2007 12:00:00:000AM <EOFD> system <EORD> 458 <EOFD> Mar 1 2007 12:00:00:000AM<EOFD>agf <EOFD> Apr 20 2007 9:10:56:036PM <EOFD> prodiws<EORD> . Basically these... (11 Replies)
Discussion started by: amvip
11 Replies
ucblinks(1B) SunOS/BSD Compatibility Package Commands ucblinks(1B)
NAME
ucblinks - adds /dev entries to give SunOS 4.x compatible names to SunOS 5.x devices
SYNOPSIS
/usr/ucb/ucblinks [-e rulebase] [-r rootdir]
DESCRIPTION
ucblinks creates symbolic links under the /dev directory for devices whose SunOS 5.x names differ from their SunOS 4.x names. Where possi-
ble, these symbolic links point to the device's SunOS 5.x name rather than to the actual /devices entry.
ucblinks does not remove unneeded compatibility links; these must be removed by hand.
ucblinks should be called each time the system is reconfiguration-booted, after any new SunOS 5.x links that are needed have been created,
since the reconfiguration may have resulted in more compatibility names being needed.
In releases prior to SunOS 5.4, ucblinks used a nawk rule-base to construct the SunOS 4.x compatible names. ucblinks no longer uses nawk
for the default operation, although nawk rule-bases can still be specifed with the -e option. The nawk rule-base equivalent to the SunOS
5.4 default operation can be found in /usr/ucblib/ucblinks.awk.
OPTIONS
-e rulebase Specify rulebase as the file containing nawk(1) pattern-action statements.
-r rootdir Specify rootdir as the directory under which dev and devices will be found, rather than the standard root directory /.
FILES
/usr/ucblib/ucblinks.awk sample rule-base for compatibility links
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWscpu |
+-----------------------------+-----------------------------+
SEE ALSO
devlinks(1M), disks(1M), ports(1M), tapes(1M), attributes(5)
SunOS 5.10 13 Apr 1994 ucblinks(1B)