Hi ,
I have a file with the following contents in file test1.txt .
I want to display only those names that have "_DL" in them.
I came up with the following command:
Problem with this is there is a trailing comma. I am unable to replace the trailing comma with sed or cut or head .Can anyone suggest an alternative or how to replace the trailing comma. The following is the sed i used that failed in this case
Thanks in advance folks
Last edited by Franklin52; 10-27-2009 at 07:55 AM..
Reason: Please use code tags!
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)
Hello there,
I have a variable in the form of '/example/file.txt' . I want to remove the ' characters from the beginning and the end so that the my new variable becomes /example/file.txt . How can I do it in a script?
I know this is a fairly easy question, but i wasn't able to implement it. (3 Replies)
If I have a string defined as:
MyString=abcde
echo $MyString
How can I loop through it character by character? I haven't been able to find a way to index the string so that I loop through it.
shew01 (10 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 to remove square brackets from output of script.
Output is:
and I need to remove the square brackets so I am lett with
121 Is sed the only means to do this and if so what are the options?
...ok so far I have managed to get rid of ] by using /usr/bin/sed 's/]//' but that... (5 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)
Edit: Figured it out. Close the thread please.
Solution:
\{8}\]
edit by bakunin: no need to close the thread, but i changed the title to SOLVED. Thanks for writing a follow-up. (0 Replies)
Hi,
Anyone can help using SED searches a character string for a specified delimiter character, and returns a leading or trailing space/blank.
Text file :
"1"|"ExternalClassDEA519CF5"|"Art1"
"2"|"ExternalClass563EA516C"|"Art3"
"3"|"ExternalClass305ED16B8"|"Art9"
...
...
... (2 Replies)
Discussion started by: fspalero
2 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)