I want to grep a range of numbers in a log file. My log file looks like this:
20050807070609Z;blah blah
That is a combination of yr,month,date,hours,minutes,seconds.
I want to search in the log file events that happened between a particular time.
like between 20050807070000 to 20050822070000... (1 Reply)
hi guys,
I want to do pattern matching with awk or sed but I don't know how. here's what I want:
I have a line number for a pattern that I have already found using grep, and I know a pattern like "---" that happens a few lines above that certain line number. I want to print out the chunk... (1 Reply)
Howdy experts,
We have some ranges of number which belongs to particual group as below.
GroupNo StartRange EndRange
Group0125 935300 935399
Group2006 935400 935476
937430 937459
Group0324 935477 935549
... (6 Replies)
Hi
I am having some problom deleting the lines between two specific lines in a file. need to delete lines between two closest lines. i.e need to find the closest range or pattern in a file with repeating patterns.
Sample Input:
WARNING
<some text in n number of lines>
ERROR:2597... (10 Replies)
Hello,
I have a column where there are values from 1 to 150.
I want to get the frequency of values in the following ranges:
1-5
6-10
11-15
....
....
....
146-150
How can I do this in a for loop?
Thanks,
Guss (1 Reply)
Hello All,
I am having problem to find what is the smallest number from 90% of highest numbers from all numbers in file. I am having file with thousands of lines and hundreds of columns.
I am familiar mainly with bash but I am open to whatever suggestion witch will lead to the solutions.
If I... (11 Replies)
Dear Friends,
I want to know how to grep for the lines that has a number between given range(start and end).
I have tried the following sed command.
sed -n -e '/20030101011442/,/20030101035519/p'
However this requires both start and end to be part of the content being grepped. However... (4 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)
so i have a code that identifies which value is the closest to a value provided by the user.
awk -F"," -v c=${COLUMN} -v t=${USTIME} '{a=$c}END{
asort(a);d=a-t;d=d<0?-d:d;v = a
for(i=NR-1;i>=1;i--){
m=a-t;m=m<0?-m:m
if(m<d){
... (3 Replies)
Hi,
In an ideal scenario, I will have a listing of db transaction log that gets copied to a DR site and if I have them all, they will be numbered consecutively like below.
1_79811_01234567.arc
1_79812_01234567.arc
1_79813_01234567.arc
1_79814_01234567.arc
1_79815_01234567.arc... (3 Replies)
Discussion started by: newbie_01
3 Replies
LEARN ABOUT DEBIAN
random
RANDOM(9) BSD Kernel Developer's Manual RANDOM(9)NAME
arc4rand, arc4random, random, read_random, srandom -- supply pseudo-random numbers
SYNOPSIS
#include <sys/libkern.h>
void
srandom(u_long seed);
u_long
random(void);
void
arc4rand(void *ptr, u_int length, int reseed);
u_int32_t
arc4random(void);
#include <sys/random.h>
int
read_random(void *buffer, int count);
DESCRIPTION
The random() function will by default produce a sequence of numbers that can be duplicated by calling srandom() with '1' as the seed. The
srandom() function may be called with any arbitrary seed value to get slightly more unpredictable numbers. It is important to remember that
the random() function is entirely predictable, and is therefore not of use where knowledge of the sequence of numbers may be of benefit to an
attacker.
The arc4rand() function will return very good quality random numbers, slightly better suited for security-related purposes. The random num-
bers from arc4rand() are seeded from the entropy device if it is available. Automatic reseeds happen after a certain timeinterval and after
a certain number of bytes have been delivered. A forced reseed can be forced by passing a non-zero value in the reseed argument.
The read_random() function is used to return entropy directly from the entropy device if it has been loaded. If the entropy device is not
loaded, then the buffer is filled with output generated by random(). The buffer is filled with no more than count bytes. It is advised that
read_random() is not used; instead use arc4rand()
All the bits generated by random(), arc4rand() and read_random() are usable. For example, 'random()&01' will produce a random binary value.
The arc4random() is a convenience function which calls arc4rand() to return a 32 bit pseudo-random integer.
RETURN VALUES
The random() function uses a non-linear additive feedback random number generator employing a default table of size 31 long integers to
return successive pseudo-random numbers in the range from 0 to (2**31)-1. The period of this random number generator is very large, approxi-
mately 16*((2**31)-1).
The arc4rand() function uses the RC4 algorithm to generate successive pseudo-random bytes. The arc4random() function uses arc4rand() to gen-
erate pseudo-random numbers in the range from 0 to (2**32)-1.
The read_random() function returns the number of bytes placed in buffer.
AUTHORS
Dan Moschuk wrote arc4random().
Mark R V Murray wrote read_random().
BSD September 25, 2000 BSD