I have a file which has about 500K records and I need to delete about 50 records from the file. I know line numbers and am using
sed '13456,13457,......d' filename > new file.
It does not seem to be working.
Any help will greatly appreciated. (5 Replies)
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)
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)
Hi
This is a sample of my data file.
##field PH01000000 1 4869017
#PH01000000G0240
WWW278545G0240 P.he_model_v1.0 erine 119238 121805 . - . ID=PH01000000G0240;Description="zinc finger, C3HC4 type domain containing protein, expressed"... (7 Replies)
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)
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
LEARN ABOUT MINIX
cp
CP(1) General Commands Manual CP(1)NAME
cp, cpdir - file copy
SYNOPSIS
cp [-pifsmrRvx] file1 file2
cp [-pifsrRvx] file ... directory
cpdir [-ifvx] file1 file2
OPTIONS -p Preserve full mode, uid, gid and times
-i Ask before removing existing file
-f Forced remove existing file
-s Make similar, copy some attributes
-m Merge trees, disable the into-a-directory trick
-r Copy directory trees with link structure, etc. intact
-R Copy directory trees and treat special files as ordinary
-v Display what cp is doing
-x Do not cross device boundaries
EXAMPLES
cp oldfile newfile # Copy oldfile to newfile
cp -R dir1 dir2 # Copy a directory tree
DESCRIPTION
Cp copies one file to another, or copies one or more files to a directory. Special files are normally opened and read, unless -r is used.
-r also copies the link structure, something -R doesn't care about. The -s option differs from -p that it only copies the times if the
target file already exists. A normal copy only copies the mode of the file, with the file creation mask applied. Set-uid bits are cleared
if the owner cannot be set. (The -s flag does not patronize you by clearing bits. Alas -s and -r are nonstandard.)
Cpdir is a convenient synonym for cp -psmr to make a precise copy of a directory tree.
SEE ALSO cat(1), mkdir(1), rmdir(1), ln(1), rm(1).
CP(1)