Hello,
I am attempting to remove all the ^M characters in a file in VI.
The command I am using is
:1,$s/^V^M//g
but it doesn't work, saying 'substitute pattern match failed'.
Any ideas why?
Jules (2 Replies)
While writing a shell script i happen to store some value in a string. Lets say the value is 59788.
Now in this script i want to get the value 9788 removing the first charater 5. The original string length usually remains constant.
Is there a single line command to do this or any simple way to... (4 Replies)
I'm appending header and trailer record for a binary file using
echo "$header" > filename
cat oldfilename >> filename
echo "$trailer" >> filename
The echo is introducing newline character after header and trailer.Please let me know is there any possibility to get rid of newline character. (2 Replies)
Hi,
I am having a pipe (|) delimited file which is having ^Z character in the middle of the text.Could anyone please suggest me how to remove this ^Z Character from the file.I almost used all the ideas posted in this site but none of them worked in my case since tis ^Z character is not coming at... (4 Replies)
Hi ,
I have a file with the following contents in file test1.txt .
AMY_MTT_240Y001,N60_PG2_10G001,A2H_P3H_10G002,7C7_7D7_NP1,A2E_PV0_10G002,L78_PG1_64S001,A2H_P2M_NP2,LDN_YSN_64S001,WV6_WYV_64... (5 Replies)
I have a file like this:
DDD_ABCDE2AB2_1104081408.104480
I need to remove the 1 after the . in the file name so that it reads:
DDD_ABCDE2AB2_1104081408.04480
Having some difficulty getting the command to work. I tried using
cut -d 26
but that just doesn't work. (3 Replies)
I need help removing the last character of every line if it is a certain character. For example I need to get rid of a % character if it is in the last position.
Input:
aaa%
%bbb
ccc
d%dd%
Output should be:
aaa
%bbb
ccc
d%dd
I tried this but it gets rid of all of the % characters.... (5 Replies)
Hi,
I have a file that has data something like below:
A
B
C
D
.....
......
.....and so on
I am trying to bring it in one line with comma delimited something like below :
A,B,C,D
I tried the something below in the code section:
cat File.txt | tr '\n' ',' (1 Reply)
Dear ALL,
How to remove junk charecter ^M from unix file i am using sun solaris unix.
I already tried few commands
:%s/^M//g
:%s/r//g
but it didnt helped me.
Any help appriciated.
Thanks
Ripudaman
Please view this code tag video for how to use code tags when posting code... (5 Replies)
I've got a file where each line is separated by ^M characters. I want to be able to cat the file without those lines. When I cat the file now what I see are blank lines. However, the blank lines are actually ^M characters; when I open the file with vi they show up.
X38888
No
No
No... (7 Replies)
Discussion started by: newbie2010
7 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)