Hi all,
Is there any way I can check a file for the linefeed character at the end of the file, and append one only if it is missing (ie. Incomplete last line)?
Need to do this because I need to write a script to process files FTP-ed over from various machines, which may or may not be... (1 Reply)
Hi Guys,
the requirement is like this,
i am having a error log file in this format,
4594.493: parallel nursery GC 2594592K->2544691K (2969600K), 30.848 ms
4605.958: parallel nursery GC 2634887K->2584986K (2969600K), 38.900 ms
4619.079: parallel nursery GC 2822555K->2774812K... (12 Replies)
Hi All,
Is there any way to append a newline character at the end of a file(coma-separated file), through shell script?
I need to check whether newline character exists at the end of a file, if it does not then append it.
Regards,
Krishna (1 Reply)
Hi All,
I am new to Shell scripting.. I have a task to parse the text file into csv format. more then half the things has done.
But the problem is when I use the sed command in shell script. it appends newline character at the end of the line. and so when I open the file in CSV it's format... (3 Replies)
Hi i am trying to append value with 0 to an existing file in the position 50-56 & 58-64 only where empty space is there
Rule:
1 row already has some value and i do not want to change anything for this row.
2nd record below you see the position 50-64 is empty, i want to replace with 0000000... (3 Replies)
Hi all,
I want to check whether tar file exists in the directory or not. If tar file exists in the directory then I want to append the files to it.
I am using the below command to tar files if the file does not exist.
tar zcvf <tar file name> <Files to append>
However, if want to... (4 Replies)
Hi All,
I'm a newbie here, i'm having proble concatinating my 2 variables. i tried na \n but it doesn't work.
ex.
var 1="YES,AGREE"
var 2="NO,DISAGREE"
expected output is:
YES,AGREE
NO,DISAGREE
i tried this
var 3 ="${var 1} \n ${var 2}"
it outputs me YES,AGREE\nNO,DISAGREE... (2 Replies)
I have a file which has lines that end with a plus (+) sign. I would like to get the next line appended to the one with the plus. For example
bla bla bla bla bla +
blip blip blip
would become
bla bla bla bla bla blip blip blip
However not all lines end with a plus sign . I would... (2 Replies)
Hello All,
I have the following code in PERL to write data to excel sheet.
Can someone please help me about how to append data to an exisitng cell?
For ex in the below given case,Cell 1,1 has Active State PERL
Now I want to add a new line like "prorgamming" without overwritting the... (3 Replies)
Hi,
I have below requirement.
Apple
Orange
Banana
Required O/p in bash
'Apple,Orange,Banana'
Can you please help.
Please wrap your samples, codes in CODE TAGS as per forum rules. (3 Replies)
Discussion started by: Rtk
3 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)