Visit Our UNIX and Linux User Community

Filtering similar lines in a big list

Thread Tools Search this Thread
Top Forums UNIX for Dummies Questions & Answers Filtering similar lines in a big list
# 1  
Old 03-14-2010
Question Filtering similar lines in a big list

I received this question for homework:
The School of IT webmaster has noticed that visitors sometimes can't find web pages because they use incorrect capitalisation in the URL.
How often does this happen?

You can tell when URL is incorrect because the HTTP response code (the second last field in access_log.txt) has the value 404, which means not found.
A successful request has the response code 200.

You must print requests which only differ by their capitalisation where one was successful (code 200) and the other was not (code 404).
For example, if the two lines appear in access_log.txt: -... "GET /~user1/HELLO/world HTTP/1.0" 404 -
... ... "GET /~user1/hello/WORLD HTTP/1.0" 200 10

then your program should print out each URL converted to lowercase, in alphabetical order:

You can assume that no requested files appeared or disappeared during the period covered by access_log.txt.
We have to write our program into a .sh file, with "#!/bin/bash" as the first line. And we have the list of access logs in a file, looking like this (it's nearly 10,000 lines long):

Code: - - [01/Feb/2008:00:06:44 +1100] "GET /~user0/cgg/msg08400.html HTTP/1.0" 304 - - - [01/Feb/2008:00:15:17 +1100] "GET /~user39/ss_logo.jpg HTTP/1.1" 304 - - - [01/Feb/2008:00:18:42 +1100] "GET /~user11/resnik/fsbt_viewreview?PERSON=Naz&BT_ID=9 HTTP/1.0" 200 7729 - - [01/Feb/2008:00:26:12 +1100] "POST /~user0/cgi-bin/hail_stone_coker.cgi HTTP/1.1" 200 185 - - [01/Feb/2008:00:31:11 +1100] "GET /~user0/cgg/msg00211.html HTTP/1.0" 304 - - - [01/Feb/2008:00:31:34 +1100] "GET /~user44/examples/chapter5/ HTTP/1.0" 200 334 - - [01/Feb/2008:00:32:18 +1100] "GET /~user20/ppgraph/ppg_create.2bp HTTP/1.0" 200 1070

How should I do this question? I know how to use 'cut' to get the section required as the answer, and i used 'egrep' to filter out the lines that do not contain neither 200 or 404. What should I do next. I'm completely lost in terms of matching the requests with same URLs but different response codes.

Thanks for the help guys.
# 2  
Old 03-14-2010
First, if this is really homework, you should be posting it here...

Homework & Coursework Questions - The UNIX and Linux Forums

Secondly, the example you provide doesn't have same URL name and different response code so it is impossible to work on your example.


Previous Thread | Next Thread
Test Your Knowledge in Computers #838
Difficulty: Medium
Both SMTP and HTTP are valid application layer protocols used as transport for SOAP.
True or False?

10 More Discussions You Might Find Interesting

1. Solaris

Getting similar lines in two files

Hi, I need to compare the /etc/passwd files from 2 servers, and extract the users that are similar in these two files. I sorted the 2 files based on the user IDs (UID) (3rd column). I first sorted the files using the username (1st column), however when I use comm to compare the files there is no... (1 Reply)
Discussion started by: anaigini45
1 Replies

2. Shell Programming and Scripting

extracting lines from a file with similar first name

consider i have two files cat onlyviews1.sql CREATE VIEW V11 AS SELECT id, name, FROM etc etc WHERE etc etc; CREATE VIEW V22 AS SELECT id, name, FROM etc etc WHERE etc etc; CREATE VIEW V33 AS (10 Replies)
Discussion started by: vivek d r
10 Replies

3. Shell Programming and Scripting

Filtering a list

Hi all When I run the system command "rpm -qa |grep xmpp" it lists many files like xmpp- xmpp- xmpp- and I want to uninstall all the rpms by using rpm -e. How can I do this??? NOTE: The number of rpms will vary... (3 Replies)
Discussion started by: Ananthdoss
3 Replies

4. Shell Programming and Scripting

Maximum Value of similar lines

Hi, Pretty new to scripting sed awk etc. I'm trying to speed up calculations of disk space allocation. I've extracted the data i want and cleaned it up but i cant figure out the final step. I need to discover a Maximum value of 1 field where the value of another field is the same using awk so... (4 Replies)
Discussion started by: imarcs
4 Replies

5. Homework & Coursework Questions

Filtering Unique Lines

Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted! 1. The problem statement, all variables and given/known data: The uniq command excludes consecutive duplicate lines. It has a -c option to display a count of the number... (1 Reply)
Discussion started by: billydeanmak
1 Replies

6. Shell Programming and Scripting

Counting similar lines

Hi, I have a little problem with counting lines. I know similar topics from this forum, but they don't resolve my problem. I have file with lines like this: 2009-05-25 16:55:32,143 some text some regular expressions ect. 2009-05-25 16:55:32,144 some text. 2009-05-28 18:15:12,148 some... (4 Replies)
Discussion started by: marcinnnn
4 Replies

7. Shell Programming and Scripting

merging similar lines

Greetings, I have been trying to merge the following lines: Sat. May 9 8:00 PM Sat. May 9 8:00 PM CW Sat. May 9 8:00 PM CW Cursed Sat. May 9 9:00 PM Sat. May 9 9:00 PM CW Sat. May 9 9:00 PM CW Sanctuary Sat. May 16 8:00 PM Sat. May 16 8:00 PM CW Sat. May 16 8:00 PM CW Sanctuary Sat. May... (2 Replies)
Discussion started by: adambot
2 Replies

8. Infrastructure Monitoring

Remove Similar Lines from a File

I have a log file "logreport" that contains several lines as seen below: 04:20:00 /usr/lib/snmp/snmpdx: Agent snmpd appeared dead but responded to ping 06:38:08 /usr/lib/snmp/snmpdx: Agent snmpd appeared dead but responded to ping 07:11:05 /usr/lib/snmp/snmpdx: Agent snmpd appeared dead... (4 Replies)
Discussion started by: Nysif Steve
4 Replies

9. Shell Programming and Scripting

Deleting the similar lines

Dear Friends myself Avinash working in bash shell The problem goes like this I have a file called work.txt assume that first colum=mac address second colum= IP third colum = port number ---------------------------------------- 00:12:23:34 2 00:12:23:35 5... (2 Replies)
Discussion started by: avi.skynet
2 Replies

10. UNIX for Advanced & Expert Users

Filtering duplicate lines

Does anybody know a command that filters duplicate lines out of a file. Similar to the uniq command but can handle duplicate lines no matter where they occur in a file? (9 Replies)
Discussion started by: AreaMan
9 Replies

Featured Tech Videos