Visit The New, Modern Unix Linux Community

Full Discussion: UNIX file handling issue
Top Forums Shell Programming and Scripting UNIX file handling issue Post 302730981 by RudiC on Wednesday 14th of November 2012 03:28:39 AM
Try to extend ctsgnb's code like
Code:
awk -F";" 'NF>=50{$50=9006}1' RS="|" OFS=";" ORS="|" yourfile

 
Test Your Knowledge in Computers #673
Difficulty: Medium
Norman Abramson, a professor at the University of Hawaii, developed the first wireless computer communication network, ALOHAnet.
True or False?

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

File handling in UNIX

Hi All, I want to read a file in UNIX line by line. Can u suggest me any command for this? (4 Replies)
Discussion started by: VENC22
4 Replies

2. Shell Programming and Scripting

File handling, getopts command in unix

I need to create a shell script having the menu with few options such as 1. Listing 2. Change permissions 3. Modify Contents 4. Delete Files 5. Exit 1. For 1. Listing: Display a special listing of files showing their date of modification and access time (side by side) along with their... (2 Replies)
Discussion started by: bab123
2 Replies

3. Shell Programming and Scripting

Performance issue in UNIX while generating .dat file from large text file

Hello Gurus, We are facing some performance issue in UNIX. If someone had faced such kind of issue in past please provide your suggestions on this . Problem Definition: /Few of load processes of our Finance Application are facing issue in UNIX when they uses a shell script having below... (19 Replies)
Discussion started by: KRAMA
19 Replies

4. UNIX for Dummies Questions & Answers

File Handling in UNIX

Hi all, I have a requirement here where I am dealing with a dynamic file. Each record in the file can contain anywhere between 1(min) to 42(max) Reject codes. For example I may have one record in the file having 3 reject codes and another record having 5 reject codes. The reject codes will be... (2 Replies)
Discussion started by: sujainarayan
2 Replies

5. Shell Programming and Scripting

UNIX File handling -Issue in reading a file

I have been doing automation of daily check activity for a server, i have been using sqls to retrive the data and while loop for reading the data from the file for several activities. BUT i got a show stopper the below one.. where the data is getting store in $temp_file, but not being read by while... (1 Reply)
Discussion started by: KuldeepSinghTCS
1 Replies

6. Shell Programming and Scripting

Issue with Error handling,not able to continue the script further

Hi, I am trying to write a script to cleanup files in a log directory .. cd log find Datk** -mtime +7 -exec rm -f {} \; 2> /dev/null Have used the above to clean up files in log directory more then 7 days older. The file can be something like ( auto-generate by some processes and... (2 Replies)
Discussion started by: nss280
2 Replies

7. UNIX for Dummies Questions & Answers

Large file data handling issue

I have a single record large file, semicolon ';' and pipe '|' separated. I am doing a vi on the file. It is throwing an error "File to long" I need to actually remove the last | symbol from this file. sed -e 's/\|*$//' filename is working fine for small files. But not working on this big... (13 Replies)
Discussion started by: Gurkamal83
13 Replies

8. Shell Programming and Scripting

ISSUE in handling multiple same name files :-(

Dear all, My work is completely stuck cos of the following issue. Please find it here and kindly help me. Task is following: I have set of files with such pattern 1t-rw-rw-r-- 1 emily emily 119 Jun 11 10:45 vgtree_5_1_pfs.root 3t-rw-rw-r-- 1 emily emily 145 Jun 11 10:46 vgtree_5_3_pfs.root... (4 Replies)
Discussion started by: emily
4 Replies

9. UNIX for Dummies Questions & Answers

File handling issue

Hi All, I am running into an issue. I have a very big file. Wants to split it in smaller chunks. This file has multiple header/ trailers. Also, between each header/trailer there are records. Number of records in each header trailer combination can vary. Also, headers can start with... (3 Replies)
Discussion started by: Gurkamal83
3 Replies

10. Shell Programming and Scripting

Issue handling single quoted argument in shell script.

Below is my script that works fine and prints the desired output: #!/bin/ksh echo "$1" | while IFS= read -r dirpath do echo "DIRR_PATH:$dirpath" install_dir=$install_dir" "$dirpath done echo "Desired Output:$install_dir" Output: ./loopissue.sh... (10 Replies)
Discussion started by: mohtashims
10 Replies
bup-margin(1)						      General Commands Manual						     bup-margin(1)

NAME
bup-margin - figure out your deduplication safety margin SYNOPSIS
bup margin [options...] DESCRIPTION
bup margin iterates through all objects in your bup repository, calculating the largest number of prefix bits shared between any two entries. This number, n, identifies the longest subset of SHA-1 you could use and still encounter a collision between your object ids. For example, one system that was tested had a collection of 11 million objects (70 GB), and bup margin returned 45. That means a 46-bit hash would be sufficient to avoid all collisions among that set of objects; each object in that repository could be uniquely identified by its first 46 bits. The number of bits needed seems to increase by about 1 or 2 for every doubling of the number of objects. Since SHA-1 hashes have 160 bits, that leaves 115 bits of margin. Of course, because SHA-1 hashes are essentially random, it's theoretically possible to use many more bits with far fewer objects. If you're paranoid about the possibility of SHA-1 collisions, you can monitor your repository by running bup margin occasionally to see if you're getting dangerously close to 160 bits. OPTIONS
--predict Guess the offset into each index file where a particular object will appear, and report the maximum deviation of the correct answer from the guess. This is potentially useful for tuning an interpolation search algorithm. --ignore-midx don't use .midx files, use only .idx files. This is only really useful when used with --predict. EXAMPLE
$ bup margin Reading indexes: 100.00% (1612581/1612581), done. 40 40 matching prefix bits 1.94 bits per doubling 120 bits (61.86 doublings) remaining 4.19338e+18 times larger is possible Everyone on earth could have 625878182 data sets like yours, all in one repository, and we would expect 1 object collision. $ bup margin --predict PackIdxList: using 1 index. Reading indexes: 100.00% (1612581/1612581), done. 915 of 1612581 (0.057%) SEE ALSO
bup-midx(1), bup-save(1) BUP
Part of the bup(1) suite. AUTHORS
Avery Pennarun <apenwarr@gmail.com>. Bup unknown- bup-margin(1)

Featured Tech Videos

All times are GMT -4. The time now is 03:41 PM.
Unix & Linux Forums Content Copyright 1993-2020. All Rights Reserved.
Privacy Policy