grep does one thing: match lines. It's not a language, so it can't match things conditionally.
awk is a language though, with features that let you build small scripts that do a lot.
It seems cryptic but there's a simple secret to understanding it: The code inside the single big { } block is run repeatedly, once every single line, and sets variables $0(entire line), $1 (first token), $2, ... $NR as it splits the line apart on spaces. The difference between N and $N, is that N gives you the contents of the variable N, and $N gives you the contents of token number N(if N was 4, you get token 4)
Hi,
I want to find out whether a string contains non numbers and + and -
example :
Str="0005000A" - It contains A
Str="0005000+" - No problem
What I have done is ,
echo $Str | grep
I will have to list out all non numeric characters... (6 Replies)
Hi i would like to add line numbers to end of each line in a file.
I am able to do it in the front of each line using sed, but not able to add at the end of the file.
Can anyone suggest
The following code adds line number to start of each line
sed = filename | sed 'N;s/\n/\t/'
how can i... (5 Replies)
Hello,
I'm trying to grep for digits surrounded by non digits and I'm obviously misinformed. Could someone help me get this sorted out
here is what I have that is not working
grep -ho '\D(\{11\})\D' *.txt (5 Replies)
Hi all,
I am new to unix and struggling to do the below
I have few lines in a xml
<title>abc:1</title>
<description>abc:2</description>
<language>abc:3</language>
Is it possible to extract only the entire word like abc:1 abc:2 abc:3 instead of the entire line into a new file . Kindly... (3 Replies)
I have a txt file with more than 10000 lines. There is a unique pattern which is scattered into the file. it starts with @9 and it has 15 characters. i need to grep them and display along with line numbers.
Eg: File - Test1
test message....
....
..
..
@9qwerty89
...test message... (8 Replies)
Hi! I'm trying to assign line numbers to each line of the file
for example consider the following..
The contents of the input file are
hello how are you?
I'm fine.
How about you?
I'm trying to get the following output..
1 hello how are you?
2 I'm fine.
3 How about you? ... (8 Replies)
I am trying to extract specific information from a large *.sam file (it's originally 28Gb).
I want to extract all lines that are on chr3 somewhere in the range of 112,937,439-113,437,438.
Here is a sample line from my file so you can get a feel for what each line looks like:
seq.4 0 ... (8 Replies)
I'm trying to grep lines where the digits at the end of each line are greater than digits. Tried this but it will only allow me to specify 2 digits. Any ideas would greatly be appreciated. grep -i '\<\{3,4,5\}\>' file
---------- Post updated at 05:58 PM ---------- Previous update was at 05:41... (1 Reply)
Hai,
I want to select only line numbers into a file if some pattern matches. I have written my script like below but its not working.
#!/bin/sh
file='/home/testfile1'
filesearch='/home/test00'
while read line
do
search=`echo $line |cut -c 1-24`
echo $search
echo `grep -n ""... (3 Replies)
How would you grep for a line containing only 5 numbers? Something like this.
10 2 12 1 13 (4 Replies)
Discussion started by: cokedude
4 Replies
LEARN ABOUT NETBSD
zegrep
ZGREP(1) BSD General Commands Manual ZGREP(1)NAME
zgrep, zegrep, zfgrep -- print lines matching a pattern in gzip-compressed files
SYNOPSIS
zgrep [grep-flags] [--] pattern [files ...]
zegrep [grep-flags] [--] pattern [file ...]
zfgrep [grep-flags] [--] pattern [file ...]
DESCRIPTION
zgrep runs grep(1) on files or stdin, if no files argument is given, after decompressing them with zcat(1).
The grep-flags and pattern arguments are passed on to grep(1). If an -e flag is found in the grep-flags, zgrep will not look for a pattern
argument.
zegrep calls egrep(1), while zfgrep calls fgrep(1).
EXIT STATUS
In case of missing arguments or missing pattern, 1 will be returned, otherwise 0.
SEE ALSO egrep(1), fgrep(1), grep(1), gzip(1), zcat(1)AUTHORS
Thomas Klausner <wiz@NetBSD.org>
BSD December 28, 2003 BSD