pattern matching over multiple lines and deleting the first

Thread Tools Search this Thread
Top Forums Shell Programming and Scripting pattern matching over multiple lines and deleting the first
# 8  
Old 11-06-2009
Or something like this:

$ cat -n tst.log
     1  blah
     2  blah
     3  Uplink traffic:
     4  Downlink traffic:
     5  blah
     6  Uplink traffic:
     7  Downlink traffic:
     8  Uplink traffic:
     9  Dropped packets: 40
    10  Downlink traffic:
    11  blah
    12  blah
$ perl -ne 'BEGIN{undef $/} $x=$_; END{$x=~s/Uplink.*?\nDownlink/Downlink/g; print $x}' tst.log
Downlink traffic:
Downlink traffic:
Uplink traffic:
Dropped packets: 40
Downlink traffic:

Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Group Multiple Lines on SINGLE line matching pattern

Hi Guys, I am trying to format my csv file. When I spool the file using sqlplus the single row output is wrapped on three lines. Somehow I managed to format that file and finally i am trying to make the multiple line on single line. The below command is working fine but I need to pass the... (3 Replies)
Discussion started by: RJSKR28
3 Replies

2. Shell Programming and Scripting

Removing multiple lines from input file, if multiple lines match a pattern.

GM, I have an issue at work, which requires a simple solution. But, after multiple attempts, I have not been able to hit on the code needed. I am assuming that sed, awk or even perl could do what I need. I have an application that adds extra blank page feeds, for multiple reports, when... (7 Replies)
Discussion started by: jxfish2
7 Replies

3. UNIX for Dummies Questions & Answers

Grep -v lines starting with pattern 1 and not matching pattern 2

Hi all! Thanks for taking the time to view this! I want to grep out all lines of a file that starts with pattern 1 but also does not match with the second pattern. Example: Drink a soda Eat a banana Eat multiple bananas Drink an apple juice Eat an apple Eat multiple apples I... (8 Replies)
Discussion started by: demmel
8 Replies

4. Shell Programming and Scripting

Deleting lines on matching certain pattern

hi I have a large xml file from which i have taken few lines . In this file I have to find for the string </invoices> and check if the 3 rd line after this string does not begin with <portCode> ,then i have to delete the string </invoices> and the next line having the string </shippingBill>... (13 Replies)
Discussion started by: sunnyboy
13 Replies

5. Shell Programming and Scripting

Sed: printing lines AFTER pattern matching EXCLUDING the line containing the pattern

'Hi I'm using the following code to extract the lines(and redirect them to a txt file) after the pattern match. But the output is inclusive of the line with pattern match. Which option is to be used to exclude the line containing the pattern? sed -n '/Conn.*User/,$p' > consumers.txt (11 Replies)
Discussion started by: essem
11 Replies

6. Shell Programming and Scripting

Deleting a matching string(line) which is also in other lines

Hi, i need help with my shell script I have a file input.txt containing the following contents /. /usr /usr/share /usr/share/doc /usr/share/doc/wine /usr/share/doc/wine/copyright /usr/share/doc/wine/changelog.Debian.gz I need output as /usr/share/doc/wine /usr/share/doc/wine/copyright... (3 Replies)
Discussion started by: Amit0991
3 Replies

7. Shell Programming and Scripting

Multiple pattern matching using awk and getting count of lines

Hi , I have a file which has multiple rows of data, i want to match the pattern for two columns and if both conditions satisfied i have to add the counter by 1 and finally print the count value. How to proceed... I tried in this way... awk -F, 'BEGIN {cnt = 0} {if $6 == "VLY278" &&... (6 Replies)
Discussion started by: aemunathan
6 Replies

8. Shell Programming and Scripting

Deleting lines from a stream after matching a pattern

Hi, I have a requirement to to an ldapsearch and remove the shadow attributes in the output file. What I do is ldapsearch() | operation to remove shadow > FILE The ldapsearch gives output like this(with same line formation): objectClass: FSConfig objectClass: extensibleObject fsCAIP:... (10 Replies)
Discussion started by: lorzinian
10 Replies

9. Shell Programming and Scripting

Finding lines matching the Pattern and their previous lines in a file

Hi, I am trying to locate the occurences of certain pattern like 'Possible network disconnect' in a text file. I can get the actual lines matching the pttern using: grep -w 'Possible network disconnect' file_name. But I am more interested in getting the timing of these events which are... (7 Replies)
Discussion started by: sagarparadkar
7 Replies

10. Shell Programming and Scripting

counting the lines matching a pattern, in between two pattern, and generate a tab

Hi all, I'm looking for some help. I have a file (very long) that is organized like below: >Cluster 0 0 283nt, >01_FRYJ6ZM12HMXZS... at +/99% 1 279nt, >01_FRYJ6ZM12HN12A... at +/99% 2 281nt, >01_FRYJ6ZM12HM4TS... at +/99% 3 283nt, >01_FRYJ6ZM12HM946... at +/99% 4 279nt,... (4 Replies)
Discussion started by: d.chauliac
4 Replies
Login or Register to Ask a Question
niff(7) 						 Miscellaneous Information Manual						   niff(7)

niff - Network Interface Failure Finder (NIFF) introductory information. DESCRIPTION
The Network Interface Failure Finder, NIFF, is a facility for detecting and reporting possible failures in network interface cards (NICs) or their connections. Detection is done by monitoring device counters and attempting to generate traffic to NICs suspected of having failed. Reporting is done using the Event Manager subsystem (EVM). NIFF does not drive failover operations; that is the responsibility of the application that subscribes to NIFF's EVM events. Appropriate courses of action may include selecting another network interface for communication or if it is a clustered environment, migrating an application. See nr(7) for further information. At the heart of NIFF is the traffic monitor thread. The traffic monitor thread tracks changes in the network device's counters, and notes if the received packet counter remains unchanged since the previous snapshot. As long as the counter continues to increase, the traffic monitor thread assumes the NIC is functioning. See nifftmt(7) for further information. The traffic monitor thread can monitor any network interface. The configuration utility, niffconfig, is used to activate and administer the traffic monitor thread. See nifftmt(7) and niffconfig(8) for further information. The Network Interface Failure Finder daemon, niffd, is a traffic generator for network interfaces that have been classified inactive by the kernel traffic monitor thread. The purpose of niffd is to get the interface packet counters to increment, signifying the interface is still alive and well. See niffd(8) for further information. SEE ALSO
: nifftmt(7), nr(7), niffconfig(8), niffd(8) delim off niff(7)