I have a bcp file that contains 10 fields. These fields are separated by a tab. How can I add my name as a new field in the 8th position for every record? I've been playing w/ sed and awk but can't seem to figure this out. (3 Replies)
I have a file that contains...
elm,mail
elm,lisp,composer,cd,ls,cd,ls,cd,ls,zcat,|,tar,-xvf,ls,cd,ls,cd,ls,vi,ls,cd,ls,vi,elm,-f,ls,rm,ls,cd,ls,vi,vi,ls,vi,ls,cd,ls,elm,cd,ls,cd,ls,vi,vi,vi,ls,vi,ls,i,vi,ls,cp,cd,fg,ls,rm,cd,ls,-l,exit
elm,mail,biff,elm,biff,elm,elm
elm,ls
... (2 Replies)
Hello Friends,
i used awk to sum up total size of files under a directory (with the help of examples, threads here).
ls -l | awk '/^-/ {total += $5} END {printf "%15.0f\n",total}' >> total.txt
After each execution of the script total result is appended into a text file:
7010
7794
8890 ... (7 Replies)
Hi,
I want to print the number of lines of a file along with filename and today's date.
Ex:
XXX|07-22-2010|8
I am using as
wc -c -l file.txt | awk '{print "XXX|",date +"%m-%d-%Y","|",$1}'
But this one prints as
AAA| 0 | 8
Can anyone please help me on this for printing the date?
... (3 Replies)
Hello everyone,
I have a file with the following structure:
abc xyz 111 222
agf hjhf 787 799
tht yah 878 898
... ... ... ...
... ... ... ...
... ... ... ...
I want to add a column (with a fixed value of 1000) at the end such that it becomes:
abc xyz 111 222 1000
agf hjhf 787... (5 Replies)
ok, so i have a bunch of numbers in a file that i'd like to add up.
i dont know how to do it.
This is how far i've gotten:
echo "4 4 5 4 3 4 3 3 4 2 43 3 293 49 23" | sed 's/ / + /g' | awk -F" "
I dont want to use the expr command with this as i dont trust it. any advice?
thanks (1 Reply)
Hi.. I have this delicate problem..:wall: I have this huge ldif file with entry's like this example below..
And I need to change the following entrys.
telephoneNumber:
emNotifNumber:
billingnumber=
BillingNumber:
Al these entrys has a number like 012345678 and it needs to add one more... (15 Replies)
Hi everyone!
I sometimes need to do some simple arithmetics, like adding a number to a certain column of a file. So I wrote a small function in the .bashrc file, which looks like this
shifter()
{
COL=$1
VAL=$2
FILE=$3
cp $FILE $FILE.shifted
awk 'NF==4 {$(( $COL )) = $(( $COL ))... (6 Replies)
Dear AWK-experts!
I did get stuck in the task of combining files after matching fields, so I'm still awkward with learning AWK.
There are 2 files: one containing 3 columns with ID, coding status, and score for long noncoding RNAs:
file1 (1.txt) (>5000 lines)
... (12 Replies)
Hi,
I need an awk to modify the following file. It is 2-column tab-separated.
Hi PP
my VBD
name DT
is NN
. SENT
Her PP
name VBD
is DT
the NN
same WRT
. SENT
<s>
Hi PP - (6 Replies)
Discussion started by: owwow14
6 Replies
LEARN ABOUT DEBIAN
bup-margin
bup-margin(1) General Commands Manual bup-margin(1)NAME
bup-margin - figure out your deduplication safety margin
SYNOPSIS
bup margin [options...]
DESCRIPTION
bup margin iterates through all objects in your bup repository, calculating the largest number of prefix bits shared between any two
entries. This number, n, identifies the longest subset of SHA-1 you could use and still encounter a collision between your object ids.
For example, one system that was tested had a collection of 11 million objects (70 GB), and bup margin returned 45. That means a 46-bit
hash would be sufficient to avoid all collisions among that set of objects; each object in that repository could be uniquely identified by
its first 46 bits.
The number of bits needed seems to increase by about 1 or 2 for every doubling of the number of objects. Since SHA-1 hashes have 160 bits,
that leaves 115 bits of margin. Of course, because SHA-1 hashes are essentially random, it's theoretically possible to use many more bits
with far fewer objects.
If you're paranoid about the possibility of SHA-1 collisions, you can monitor your repository by running bup margin occasionally to see if
you're getting dangerously close to 160 bits.
OPTIONS --predict
Guess the offset into each index file where a particular object will appear, and report the maximum deviation of the correct answer
from the guess. This is potentially useful for tuning an interpolation search algorithm.
--ignore-midx
don't use .midx files, use only .idx files. This is only really useful when used with --predict.
EXAMPLE
$ bup margin
Reading indexes: 100.00% (1612581/1612581), done.
40
40 matching prefix bits
1.94 bits per doubling
120 bits (61.86 doublings) remaining
4.19338e+18 times larger is possible
Everyone on earth could have 625878182 data sets
like yours, all in one repository, and we would
expect 1 object collision.
$ bup margin --predict
PackIdxList: using 1 index.
Reading indexes: 100.00% (1612581/1612581), done.
915 of 1612581 (0.057%)
SEE ALSO bup-midx(1), bup-save(1)BUP
Part of the bup(1) suite.
AUTHORS
Avery Pennarun <apenwarr@gmail.com>.
Bup unknown-bup-margin(1)