02-13-2008
Shell Programming and Scripting
Hi
Iam using grep command as follows in my script
read_file1()
{
cat file1.txt | while read line
do
grep $line file2.txt >> out.txt
done
}
read_file1
This way the performance is very slow. We are having lacks of records in file1 and file2
how can i improve the performance.
9 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi,
iam having the file as follows:
ABCDEFGH|0987654321234567
ABCDEFGH|0987654321234523
ABCDEFGH|0987654321234556
ABCDEFGH|0987654321234545
POIUYTRE|1234567890890678
POIUYTRE|1209867757352567
POIUYTRE|5463879088797131
POIUYTRE|5468980091344456
pls provide me the split command
... (14 Replies)
Discussion started by: nivas
14 Replies
2. Shell Programming and Scripting
I want to compare some files.
say iam having 2 sets of files ,each is having some 10 files.
ie,
file1
1a.txt
1b.txt
1c.txt
...
file2
2a.txt
2b.txt
2c.txt
...
i need to read line by line of this files parralley..
ie.. i want to read file1 first line that is 1a.txt and file2... (2 Replies)
Discussion started by: nivas
2 Replies
3. Shell Programming and Scripting
Hi,
Iam having file1 as follows:
ERTYUIOU|1234567689089767688
FDHJHKJH|6817738971783893499
JFKDKLLUI|9080986766433498444
FILE2
ERTYUIOU|1234567689089767688 resh@abc_com 767637218328322332 893589893499 asdsddssd ... (21 Replies)
Discussion started by: nivas
21 Replies
4. Shell Programming and Scripting
Hi,
Iam having the files as follows:
file1
aa
aa
aa
aa
ab
ac
ad
ae
file2
aa
aa
ab
Outputfile: (20 Replies)
Discussion started by: nivas
20 Replies
5. Infrastructure Monitoring
# set date to your spec: this is month/day/yr/hr/min/sec:
sysdate=`date '+%m/%d/%Y-%H:%M:%S'`
# get the last line before the history file is modified
tail -1 /tmp/hosthistory.txt |while read lastdate mydevices
do
echo $lastdate
echo $mydevices
done
LIST = 'ypcat hosts|| sort... (11 Replies)
Discussion started by: lemseffert
11 Replies
6. Shell Programming and Scripting
RCS file: /home/rcap/.APCVS/regs/rc/power/analysis/pow_rtl/renes_setup.g,v
Working file: ./power/analysis/pow_rtl/renes_setup.g
head: 1.14
branch:
locks: strict
access list:
symbolic names:
br_2010_101_200: 1.13.0.12
br_2010_101_100: 1.13.0.10
br_2009_91_200:... (3 Replies)
Discussion started by: harjinder
3 Replies
7. Shell Programming and Scripting
I was trying out some new series to get it print
1
1 2
1 2 3
1 2 3 4
1 2 3 4 5
and the seond one is
1
2 2
3 3 3
4 4 4 4
5 5 5 5 5
but was unable to get the result. (5 Replies)
Discussion started by: harjinder
5 Replies
8. Shell Programming and Scripting
hi,
i am trying this while loop and i only want that it should only read food as pizza....no other entry should be taken here.
#!/usr/bin/perl -w
$food = " ";
while ( $food ne 'pizza' )
{
print 'enter what you had last night: ';
chomp ($food = <STDIN>);
#print $food ;
}
... (2 Replies)
Discussion started by: kullu
2 Replies
9. UNIX for Dummies Questions & Answers
sxsaaas (3 Replies)
Discussion started by: VikrantD
3 Replies
mv(1) General Commands Manual mv(1)
Name
mv - move or rename files
Syntax
mv [-i] [-f] [-] file1 file2
mv [-i] [-f] [-] file... directory
Description
The command moves (changes the name of) file1 to file2.
If file2 already exists, it is removed before file1 is moved. If file2 has a mode which forbids writing, prints the mode and reads the
standard input to obtain a line. If the line begins with y, the move takes place. If it does not, exits. For further information, see
In the second form, one or more files (plain files or directories) are moved to the directory with their original file-names.
The command refuses to move a file onto itself.
Options
- Interprets all following arguments as file names to allow file names starting with a minus.
-f Force. This option overrides any mode restrictions or the -i switch.
-i Interactive mode. If a move is to supersede an existing file, the system prompts youw with the name of the file fol-
lowed by a question mark. If you type a string that begins with y, the move occurs. If you type any other response,
the move does not occur.
Restrictions
If file1 and file2 lie on different file systems, must copy the file and delete the original. In this case the owner name becomes that of
the copying process and any linking relationship with other files is lost.
See Also
cp(1), ln(1)
mv(1)