may you try to start removing a part of txt files by running:
where <chars> is a string of one ore more characters contained at the end of a part of the .txt files.
In this way the list of .txt files to be removed should contain less elements.
I made tar file having file names more character( up to 50).
When i extract file in Linux it extracts fine.. but in HPUX all file name which are more than 24 are trimed to 24 characters.
i m using "tar -xvf xx.tar"
i read some O and N option for New posix and Old but didnt got. :confused:
... (2 Replies)
All,
I have files in directory,when i try to overwrite those files it gave operation not permitted error. I am using same group user (ina2) while overwritng this file.
Sample file :
-rw-rw-r-- 1 ina1 indev 316 Jun 06 13:44 ONCTEST.dat
Error:
cp: /proj/out/ONCTEST.dat: Operation... (4 Replies)
Hello Guys...
I am a newbie to Unix. I am having a requirement, Like in a file, I want to count the number of characters,
I used wc -c and wc -m, But both are giving the byte count instead of character count.
Please help me guys... Its very very urgent.
Really appreciate ur help..
... (5 Replies)
dd if=/dev/zero of=/var/images/abc.img bs=1M count=0 seek=2097152
dd: truncating at 2199023255552 bytes in output file `/var/images/abc.img': File too large
The dd commad fails here saying its truncating if I try same command with less value for seek it works
dd if=/dev/zero... (3 Replies)
I am trying to show out the character count of a file if greater than 500 characters. When I do the -m its show the size of the file and not the characters in the file. Where am I getting confused? Or is -c and -m the same thing? Code is below
if ;
then
echo "Char... (3 Replies)
Hi,
I am using tr command like below:
cat file_name | tr -c "" "" > output_file
When i run my script from command mode, it is working fine. I scheduled my job in autosys. When the job runs at specified I am getting below Error:
tr: when translating with complemented character... (5 Replies)
I have used the mail command from the command line for sending mail from one machine to anther machine.
Example:
mail -s "Test" thillaselvan@xxx.co.in
Testing
But the mail is not getting received.
I have checked the logs in the following file.
tail -f /var/log/exim4/mainlog
It is... (0 Replies)
Hi All,
I am using the below script which has awk command, but it is not returing the expected result. can some pls help me to correct the command.
The below script sample.ksh should give the result if the value of last 4 digits in the variable NM matches with the variable value DAT. The... (7 Replies)
I am on Linux LXLE.
I been trying to change directories and opens folders and files.
1. I cd /home file
2. then user (/home/teak/)
Then I try to open the Document file, wouldn't it be /home/teak/doument? . It responds not a directory. So how would I open the document file, or not... (3 Replies)
I am new to unix.I have a requirement to get few fields from the log file as below.
Log
app9/cc-gr_base.log.2017-07-19.gz: hostname 1500523166993 NA:NA:NA http-nio-8080-exec-56 INFO Points balance from MIS for user with userId: 19651069, first name: DEREK RICHARD and last name: BOUDREAU is... (3 Replies)
Discussion started by: nextStep
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)