Using an older tool, the programmable interactive line editor ed or ex:
Producing:
I like this approach for small jobs because the syntax of the range is so understandable -- from the pattern so many lines back, to the pattern plus so many lines forward.
A disadvantage is that this can be slow on large files because the entire file is read.
Hi,
I have a file, which is having a pattern "SEARCH" somewhere towards end of the file,
if i am giving " grep -i "SEARCH" $File" , it is taking too much time as file is very big.
So i want to search for the pattern from the back side of the file, how can we search for a pattern in bottom... (5 Replies)
hi,
I have looked at many grep threads and am unable to find something like this: please help.
I have a file which is generated from a report generator and i am trying to load a whole lot of specific data into a table for the users. One field is causing me problems.All the rest i can manage.... (7 Replies)
Hi Folks
I need a one liner to parse through a log and if the string is found print the line above, the line with the string and the line below.
example:
The ball is green and blue
Billy through the ball higer.
Jane got hurt with the ball.
So if I search for Billy I would need the 3... (1 Reply)
How to remove x lines form top and y lines form bottom.
This works, but like awk only cat file | head -n-y | awk 'NR>(x-1)'
so remove last 3 lines and 5 firstcat file | head -n-3 | awk 'NR>4' (5 Replies)
Oracle Linux 6.4
In a directory I have more than 300 files with the extension .log
I want the first 5 and last 5 lines of these .log files to be printed on screen with each file's name.
Expected output :
Printing first 5 and last 5 lines of FX_WT_Feb8_2014.log
!! Authentication... (7 Replies)
Hello forum,
Seems that only I have alot of questions regarding Ubuntu :D
In Ubuntu 12.04 LTS the gnome I have been using gdm and lightdm.
In lightdm the top and side bars are aka "unity" and can be removed using apt-get remove unity
I need to do the same for menu bars gdm. I do not... (0 Replies)
Hi,
i have a file which contains PID and wanted to execute kill command. but the thing is, when killing PID's needs to kill PID from bottom to top.
Please help
INPUT
21414 sh -c extract.ksh ASA
21416 /bin/ksh extract.ksh ASA
21428 /usr/bin/perl -w /var/tmp/tempperl.21416 ASA... (4 Replies)
Dear All
I was wondering if someone could help me in resolving an issue.
I have a file like this:
column1 column2
2 4
3 5
8 9
0 12
0 0
0 0
9 0
87 0
1 0
1 0
1 0
4 0 (2 Replies)
Hi,
I have a requirement where I need to delete given number of top and bottom rows in a flat file which has new line as its delimiter.
For ex: if top_rows=2 & bottom_rows=1
Then in a given file which looks like:
New York
DC
LA
London
Tokyo
Prague
Paris
Bombay
Sydney... (7 Replies)
Discussion started by: calredd
7 Replies
LEARN ABOUT V7
zgrep
ZGREP(1) General Commands Manual ZGREP(1)NAME
zgrep - search possibly compressed files for a regular expression
SYNOPSIS
zgrep [ grep_options ] [ -e ] pattern filename...
DESCRIPTION
Zgrep invokes grep on compressed or gzipped files. These grep options will cause zgrep to terminate with an error code:
(-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*). All other options specified are passed directly to grep. If no file is specified, then the
standard input is decompressed if necessary and fed to grep. Otherwise the given files are uncompressed if necessary and fed to grep.
If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.
EXIT CODE
2 - An option that is not supported was specified.
AUTHOR
Charles Levert (charles@comm.polymtl.ca)
SEE ALSO grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)ZGREP(1)