Visit Our UNIX and Linux User Community


unix command


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting unix command
# 1  
Old 08-04-2009
unix command

hi frnds,

i have my file like this

Code:
<REALTION>
dd
dd
dd
</REALTION>
...
<REALTION>
hh
hh
</REALTION>

i want to pick only 6th REALTION block. what command i can use ?

Last edited by zaxxon; 08-04-2009 at 06:29 AM.. Reason: code-tags, infraction for still ignoring request from staff member; see old posts of op.
# 2  
Old 08-04-2009
Following should be what you're after - output you see here is from a quick test file where each block contains a couple of lines in form nn where n = block:

Code:
#  awk '/<REALTION/{t+=1}t==6{print}' file
<REALTION>
66
66
</REALTION>

HTH

Last edited by Tytalus; 08-04-2009 at 07:23 AM.. Reason: added explanatory comment for o/p
# 3  
Old 08-04-2009
If there is something between such a <REALTION> </REALTION> block it will be printed out too, ie. his ... lines for example.

I have a bit cumbersome solution:
Code:
awk '
     /^<REL/ {z++; if(z==6){print $0; f=1; next}}
     $0 !~ /^<\/REL/ && f==1 {print $0}
     $0 ~ /^<\/REL/ && f==1 {print $0; f=0}
' z=0 f=0 infile

Input:
Code:
<RELATION>
1
</RELATION>
...
<RELATION>
2
</RELATION>
...
<RELATION>
3
</RELATION>
...
<RELATION>
4
</RELATION>
...
<RELATION>
5
</RELATION>
...
<RELATION>
6
66
666
</RELATION>
...
<RELATION>
7
</RELATION>
...
<RELATION>
8
</RELATION>

Output:
Code:
<RELATION>
6
66
666
</RELATION>

# 4  
Old 08-04-2009
true... so this should be cleaner:

Code:
#   nawk '
/^<REAL/ {t++}
t==6 {print}
/^<\/REAL/ && t==6 {t++}
' file


Previous Thread | Next Thread
Test Your Knowledge in Computers #889
Difficulty: Easy
In sed, the REGEX caret (^) matches the end of the line.
True or False?

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

UNIX command to copy files from Windows to UNIX box

Hi Folks, I have a file name abc.xml in my windows machine at the location c:\ytr\abc.xml which I want to place at the unix box machine inside cde directory.. at the following location that is /opt/app/cde/ now the credentials of unix box are abc345 -->(dummyid) ftyiu88--->(dummy passwd) ... (4 Replies)
Discussion started by: punpun66
4 Replies

2. Shell Programming and Scripting

Specify an entire UNIX command as a command line argument

I'm trying to write a bash script called YN that looks like the following YN "Specify a question" "doThis" "doThat" where "doThis" will be executed if the answer is "y", otherwise "doThat". For example YN "Do you want to list the file dog?" "ls -al dog" "" Here's my attempt... (3 Replies)
Discussion started by: LeoKSimon
3 Replies

3. UNIX Desktop Questions & Answers

Can Unix access Windows' File through Command Prompt in Unix

Hi all, I wish to know whether Unix can access window's file in Unix's terminal? Apart from that, how to copy files or share files between Window and Unix? I get to know of secure copy, however, my company's Unix does not support the feature of secure copy? Any other method for me to share/... (5 Replies)
Discussion started by: jessy83
5 Replies

4. UNIX for Dummies Questions & Answers

New to Unix command line and have a question about the "sort" command

I am going through the Unix Made Easy second edition book by John Muster. So far it's been very informative and I can tell it may be a bit out of date. In one of the exercises it talks about the "sort" command and using it to sort column's of data etc. The "sort" command has changed a bit and... (1 Reply)
Discussion started by: budfoxcat
1 Replies

5. UNIX for Advanced & Expert Users

unix command : how to insert text at the cursor location via command line?

Hi, Well my title isn't very clear I think. So to understand my goal: I have a script "test1" #!/bin/bash xvkbd -text blabla with xbindkeys, I bind F5 key in order it runs my test1 script So when I press F5, test1 runs. I'm under Emacs/Vi and I press F5 in order to have "blabla" be... (0 Replies)
Discussion started by: xib.be
0 Replies

6. Shell Programming and Scripting

assign a command line argument and a unix command to awk variables

Hi , I have a piece of code ...wherein I need to assign the following ... 1) A command line argument to a variable e.g origCount=ARGV 2) A unix command to a variable e.g result=`wc -l testFile.txt` in my awk shell script When I do this : print "origCount" origCount --> I get the... (0 Replies)
Discussion started by: sweta_doshi
0 Replies

7. HP-UX

How to use more than one MPE command STREAM with Unix command in a single shell?

Hello, I have problem in writing the shell script involving MPE command STREAM related to HP-UX and Unix command. Script is sh "nlshCMD 'STREAM <job name1>' | 'SHOWJOB' | grep $HPJOBNUM" sh "nlshCMD 'STREAM <job name2>' | 'SHOWJOB' | grep $HPJOBNUM" sh "nlshCMD 'STREAM <job name3>' |... (1 Reply)
Discussion started by: bosskr
1 Replies

8. Shell Programming and Scripting

How to use more than one MPE command STREAM with Unix command in a single shell?

Hello, I have problem in writing the shell script involving MPE command STREAM related to HP-UX and Unix command. Script is sh "nlshCMD 'STREAM <job name1>' | 'SHOWJOB' | grep $HPJOBNUM" sh "nlshCMD 'STREAM <job name2>' | 'SHOWJOB' | grep $HPJOBNUM" sh "nlshCMD 'STREAM <job name3>' |... (0 Replies)
Discussion started by: bosskr
0 Replies

9. UNIX for Dummies Questions & Answers

wc command help.... and other unix command....... urgent

hi all. thanks for looking i am doing some homework. one question is that when type wc and then how to tell the program that we have finished entering data? also why do some operating systems report 22 as the number of bytes in the file above, while others only 20? thanks so much,... (1 Reply)
Discussion started by: dashi2k
1 Replies

Featured Tech Videos