10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi all,
I need to find the line by using grep command with the two occurence of word in the same line. I tried the below example it prints the word choice.
cat nohup.out
Dictionary utl is completed.
file is completed.
Dictionary file is completed.
grep 'Dictionary\|file'... (0 Replies)
Discussion started by: arun888
0 Replies
2. Shell Programming and Scripting
hi all,
I would need to add the description in the below syntax. let me know the below syntaxt how it can be changed to add the description in the below.
ps -ef | grep "server" | mailx -s "servers currently which are running" operational@acel.com
Server 62 -> Used for User acessing.... (14 Replies)
Discussion started by: arun888
14 Replies
3. UNIX for Advanced & Expert Users
My understanding is that "setserial" command is used to change the attributes of
serial device files (ttyS) managed by the linux serial driver(serial module).
My doubt is, using setserial command is it possible to change the attributes of other serial device files managed by a different driver... (2 Replies)
Discussion started by: Kesavan
2 Replies
4. Shell Programming and Scripting
Hi,
I almost always use back quotes in scripts to assigin output of a command to a variable.
eg: file=`basename a/b/c/d/file`
year_mon=`date +%Y%m`
But the same can be achieved like:
file=$(basename a/b/c/d/file)
year_mon=$(date +%Y%m)
I would like to know if there is... (3 Replies)
Discussion started by: wanderingmind16
3 Replies
5. Shell Programming and Scripting
Hi linux experts,
I am using ftp command as :
ftp hostname
but it says unable to connect,
if i am using the same in sftp it is working :
sftp hostname
it works.
so please help me how should i use ftp command. (8 Replies)
Discussion started by: salil2012
8 Replies
6. Shell Programming and Scripting
Hello,
I want to search for a file/directory named "abc" which is located anywhere in the given unix system.
I am using the command :-
But the problem is that this is giving me all combinations of files with have 'abc' in their name. But can I know the option to be used to get the location... (5 Replies)
Discussion started by: nsharath
5 Replies
7. Shell Programming and Scripting
hello,
I am using banner command in my shell.I used :-
The problem is that the output is printed in 3 separate lines.I want to display it in a single line.If the size is not enough then at least 2 words should come in the same line. Can you tell me what is the option in banner that would help... (4 Replies)
Discussion started by: nsharath
4 Replies
8. UNIX for Dummies Questions & Answers
Hi,
I am trying to understand a script and found a line as follows:
tr '\211\233\240' '\040' < $IN_FILE | tr -cd '\11\12\15\40-\176' > $TEMP_FILE
Can any one explain the above line .. What are they trying to translate using the tr command.. I have not used tr command.. so feeling little bit... (2 Replies)
Discussion started by: risshanth
2 Replies
9. UNIX for Advanced & Expert Users
PLEASE EXPLANIN ME...
sed 's~\(.*\)\(<name>\)\(.*\)\(</name>\)\(.*\)~\2\3\4~'
this is the format
<start><name>123<\name><addr>BAC<\addr><loc>sfo<\loc></start> (1 Reply)
Discussion started by: gksenthilkumar
1 Replies
10. Shell Programming and Scripting
Hi All,
I wanted to list all the files in the current directory which contains the pattern "error". I tried the following grep command
grep -i 'error' *.*
but i got the error message "ksh: /usr/bin/grep: 0403-027 The parameter list is too long."
Any idea why the grep didn't work?
Note:... (3 Replies)
Discussion started by: mona
3 Replies
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)