Visit Our UNIX and Linux User Community


Remove content from file


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Remove content from file
# 1  
Old 08-30-2006
Remove content from file

hey all, I have a file with records in following format

8-29-2006 13:01:45|ABC|45
8-29-2006 14:23:12|DEF|21
8-30-2006 00:04:57|ABC|34

I want to remove all yesterday records. Can anyone show me how? Thanks!
# 2  
Old 08-30-2006
Do you mean you want to keep the today's record and removed all the past record ??
or you want to remove only the yester day record keeping all prior record and today's record intact.?
# 3  
Old 08-30-2006
Perl solution:
Code:
perl -i.old -ne 'print unless /^8-29/' file

# 4  
Old 08-30-2006
This is supposed to be a daily job, so if I am doing the right job from the beginning then all I need to do should be removing yesterday record. But I guess only keeping today's record and removed all the past reocrds should do as well. Thanks
# 5  
Old 08-30-2006
what my approach is

today=`date '+%m-%d-Y'`
grep -v "$today" file_name >file_name

Last edited by jambesh; 08-31-2006 at 05:27 AM.. Reason: update
# 6  
Old 08-31-2006
the problem is I can only modify the file, writing the entries to another file is not an option. Can anyone help?
# 7  
Old 08-31-2006
you can do that if you redirect the out put to the same file , but here you will lose the original file information , i mean the same file will contain the todays log only previous log will be removed .

Previous Thread | Next Thread
Test Your Knowledge in Computers #852
Difficulty: Medium
AngularJS is a JavaScript-based open-source front-end web framework mainly maintained by Facebook.
True or False?

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

How to remove exisiting file content from a file and have to append new file content?

hi all, i had the below script x=`cat input.txt |wc -1` awk 'NR>1 && NR<'$x' ' input.txt > output.txt by using above script i am able to remove the head and tail part from the input file and able to append the output to the output.txt but if i run it for second time the output is... (2 Replies)
Discussion started by: hemanthsaikumar
2 Replies

2. Shell Programming and Scripting

Script to remove same content from other file

Hi/ Hello all Guru here, I am trying to create script to remove same content from other file, already tested few idea and found that in unix it is limited to sort and uniq. There is many script for removing duplicate content however to delete all same content is non. Need your help and guide .... (7 Replies)
Discussion started by: Mr_47
7 Replies

3. Shell Programming and Scripting

Remove the duplicate content in a file

Here is the contents of test.txt Dependencies Resolved Changes in packages about to be updated: ChangeLog for: 1:perl-Archive-Extract-0.38-131.el6_4.x86_64, - Resolves: #915692 - CVE-2013-1667 (DoS in rehashing code) Dependencies Resolved Changes in packages about to be updated: ... (5 Replies)
Discussion started by: ashokvpp
5 Replies

4. Shell Programming and Scripting

Remove some content from a verilog file

Hi, I have a verilog file which looks like module xyz (x, y, z, a, b, c); input x; input y; input z; output a; output b; output c; initial begin ... end always ... ... endmodule (7 Replies)
Discussion started by: matbrow
7 Replies

5. Shell Programming and Scripting

Remove the file content based on the Header of the file

Hi All, I want to remove the content based on the header information . Please find the example below. File1.txt Name|Last|First|Location|DepId|Depname|DepLoc naga|rr|tion|hyd|1|wer|opr Nava|ra|tin|gen|2|wera|opra I have to search for the DepId and remove the data from the... (5 Replies)
Discussion started by: i150371485
5 Replies

6. Shell Programming and Scripting

Help with remove duplicate content

Input file data_1 10 US data_1 2 US data_1 5 UK data_2 20 ENGLAND data_2 12 KOREA data_3 4 CHINA . . data_60 123 US data_60 23 UK data_60 45 US Desired output file data_1 10 US data_1 5 UK data_2 20 ENGLAND data_2 12 KOREA (2 Replies)
Discussion started by: perl_beginner
2 Replies

7. Shell Programming and Scripting

Shell script to remove some content in a file

How can I remove all data that contain domain e.g zzgh@something.com, sdd@something.com.my and gg@something.my in one file? so that i only have data without the domain in the file. Here is the file structure "test.out" more test.out 1 zzztop@b.com 1 zzzulll 1 zzzullll@s.com.my ... (4 Replies)
Discussion started by: Mr_47
4 Replies

8. Shell Programming and Scripting

Help with remove duplicate content and only keep the first content detail

Input data_10 SSA data_2 TYUE data_3 PEOCV data_6 SSAT data_21 SSA data_19 TYUEC data_14 TYUE data_15 SSA data_32 PEOCV . . Desired Output data_10 SSA data_2 TYUE data_3 PEOCV data_6 SSAT data_19 TYUEC (9 Replies)
Discussion started by: patrick87
9 Replies

9. Shell Programming and Scripting

Remove specific content in a file

Hi, I have a file called fl_list consists of files i have to archive. I want to create a exception parm called except_parm, so if it finds the directory it will not archive these files and remove from fl_list. $ cat fl_list /apps/dev/ihub/ready/IA003B/IA003B_Deal_Header_yyyymmdd_hhmmss.txt... (1 Reply)
Discussion started by: k9cheung
1 Replies

10. Shell Programming and Scripting

remove space from file content

i am a bit new to shell scripting i have a file containing xxxx xx xx but i want to output the content as xxxxxxxx. thus removing the space. any idea how i can do this (4 Replies)
Discussion started by: blackzinga
4 Replies

Featured Tech Videos