Sponsored Content
Operating Systems Solaris delete first 100 lines from a file Post 302145695 by salaathi on Thursday 15th of November 2007 03:01:03 AM
Old 11-15-2007
MySQL

Yes. Its really faster than the tail command.

Thanks Yogesh


Sarathi
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

delete all lines in file

how can i delete all lines in file by using "vi" ? (6 Replies)
Discussion started by: strok
6 Replies

2. Solaris

delete first 100 lines rather than zero out of file

Hi experts, in my solaris 9 the file- /var/adm/messeages growin too first. by 24 hours 40MB. And always giving the below messages-- bash-2.05# tail -f messages Nov 9 16:35:38 ME1 last message repeated 1 time Nov 9 16:35:38 ME1 ftpd: wtmpx /var/adm/wtmpx No such file or directory Nov 9... (7 Replies)
Discussion started by: thepurple
7 Replies

3. Shell Programming and Scripting

Please help to delete lines in a file

Dear All, I m trying to delete two lines at a time in file called 123.txt. Im using sed and based on line numbers i m deleting it and writing it to another file. Follwing i have done. cat 123.txt | sed '1,5 d' > new I want to delete line no 1 and 5 at a time, for that i m using... (6 Replies)
Discussion started by: naree
6 Replies

4. UNIX for Dummies Questions & Answers

Delete same lines out of file.

hello... I have a file with a list of filepaths in it, like so: delMe.txt (files to be deleted) ./root/index.php ./root/language/se/home.inc.php ./root/language/pl/home.inc.php Now here's what I'm trying to do. I want any lines in the above file (delMe.txt) to be deleted out of the... (3 Replies)
Discussion started by: jzacsh
3 Replies

5. Shell Programming and Scripting

How to delete lines in a file that have duplicates or derive the lines that aper once

Input: a b b c d d I need: a c I know how to get this (the lines that have duplicates) : b d sort file | uniq -d But i need opossite of this. I have searched the forum and other places as well, but have found solution for everything except this variant of the problem. (3 Replies)
Discussion started by: necroman08
3 Replies

6. UNIX for Dummies Questions & Answers

How get only required lines & delete the rest of the lines in file

Hiiii I have a file which contains huge data as a.dat: PDE 1990 1 9 18 51 28.90 24.7500 95.2800 118.0 6.1 0.0 BURMA event name: 010990D time shift: 7.3000 half duration: 5.0000 latitude: 24.4200 longitude: 94.9500 depth: 129.6000 Mrr: ... (7 Replies)
Discussion started by: reva
7 Replies

7. UNIX for Advanced & Expert Users

In a huge file, Delete duplicate lines leaving unique lines

Hi All, I have a very huge file (4GB) which has duplicate lines. I want to delete duplicate lines leaving unique lines. Sort, uniq, awk '!x++' are not working as its running out of buffer space. I dont know if this works : I want to read each line of the File in a For Loop, and want to... (16 Replies)
Discussion started by: krishnix
16 Replies

8. UNIX for Advanced & Expert Users

Delete first 100 lines from a BIG File

Hi, I need a unix command to delete first n (say 100) lines from a log file. I need to delete some lines from the file without using any temporary file. I found sed -i is an useful command for this but its not supported in my environment( AIX 6.1 ). File size is approx 100MB. Thanks in... (18 Replies)
Discussion started by: unohu
18 Replies

9. Shell Programming and Scripting

Delete 40 lines after every 24 lines from a file

Hello, I have file of more than 10000 lines. I want to delete 40 lines after every 20 lines. e.g from a huge file, i want to delete line no from 34 - 74, then 94 - 134 etc and so on. Please let me know how i can do it. Best regards, (11 Replies)
Discussion started by: nehashine
11 Replies

10. UNIX for Beginners Questions & Answers

Delete Some Lines from File

Hi, I have a txt document having a format like this: DATA1 | DATA2 | DATA3 | 23-JAN-20 23:41:34 DATA1 | DATA2 | DATA3 | 23-JAN-20 23:41:32 DATA1 | DATA2 | DATA3 | 23-JAN-20 23:41:30 ... DATA1 | DATA2 | DATA3 | 23-JAN-20 22:35:31 DATA1 | DATA2 | DATA3 | 23-JAN-20 22:30:34 DATA1 | DATA2 |... (1 Reply)
Discussion started by: gc_sw
1 Replies
TAIL(1) 						      General Commands Manual							   TAIL(1)

NAME
tail - deliver the last part of a file SYNOPSIS
tail [ +-number[lbc][rf] ] [ file ] tail [ -fr ] [ -n nlines ] [ -c nbytes ] [ file ] DESCRIPTION
Tail copies the named file to the standard output beginning at a designated place. If no file is named, the standard input is copied. Copying begins at position +number measured from the beginning, or -number from the end of the input. Number is counted in lines, 1K blocks or bytes, according to the appended flag or Default is -10l (ten ell). The further flag causes tail to print lines from the end of the file in reverse order; (follow) causes tail, after printing to the end, to keep watch and print further data as it appears. The second syntax is that promulgated by POSIX, where the numbers rather than the options are signed. EXAMPLES
tail file Print the last 10 lines of a file. tail +0f file Print a file, and continue to watch data accumulate as it grows. sed 10q file Print the first 10 lines of a file. SOURCE
/src/cmd/tail.c BUGS
Tails relative to the end of the file are treasured up in a buffer, and thus are limited in length. According to custom, option +number counts lines from 1, and counts blocks and bytes from 0. Tail is ignorant of UTF. TAIL(1)
All times are GMT -4. The time now is 08:45 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy