Exactly Wisecracker, also the correct/recommended way to use printf is to not use values in the format string (first field), but use format specifiers instead:
Another thing to note is that the first curly brace must be followed by space (space, tab, newline) (something that was done right here, but good to know)..
I need the line printed with echo to append to eof of to exactly line, am i able to do that?
i mean
echo "sysctl -w lalala=1" > to end of file /etc/sysctl.conf
or to the 21st line, if the line exist, open new line and insert text there.
Thx.maybe i'm in wrong topic but anyway... (2 Replies)
I want to print out a directory listing, then append ] to the end of each line. I'm trying to create a list of Wiki links based on folder listings that i can just copy and paste without having to edit 100's of file listings.
Using sed i've figured out to do something like this:
sed... (4 Replies)
Hi,
I have a file 'tmp.dat' that contains the below data:
81763
40829
30405
80452
I want to prepend a ' character to the beginning of every line, and I want to append ', at the end of every line. Below is what I expect:
'81763',
'40829',
'30405',
'80452',
Can anyone help me?
... (3 Replies)
I am trying to replace in multiple files every instance of text that begins with http and add hyperlink characters to it. I can get it to work with the following:sed -e "s/http*.*/<a href=\"&\">&<\/a>/g" *
as long as the http text is at the end of the file. I need it to stop at the end of the... (2 Replies)
I have a file like below
#GROUP A belongs to Asia
GROUP A jojh hans local admin
GROUP A gege fans michel jing jong
#GROUP U belongs to USA
GROUP U jeff goal hello world
My requirement is to grep for first apperence of GROUP A which is not commented and append my name to end of file.... (12 Replies)
hi,
just wanted to make a shortcut of this one
a="a b c"
b=`echo $a | awk '{print $2}'`
echo "the middle is $b"
why can't i do this:
a="a b c"
echo "the middle is ${`echo $a | awk '{print $2}'`}" <- bad substitution :wall:
thanks (6 Replies)
Hi,
I need to replace and append a string in a text if grep is true. For eg:
grep ABC test.txt | grep -v '\.$' | awk {'print $4'} | sed "s/ ?
How do I replace all instances of "print $4" using sed with another sring? Eg of the string returned will be,
lx123
web222
xyz
Want to... (8 Replies)
Hi,
I have a File, which have multiple rows.
Like below
123456 Test1 FNAME JRW#$% PB MO Approver XXXXXX. YYYY
123457 Test2 FNAME JRW#$% PB MO Super XXXXXX. YYYY
123458 Test3 FNAME JRW#$% PB MO Approver XXXXXX. YYYY
I want to search a line which contains PB MO Approver and append... (2 Replies)
Sorry for the long/weird title but I'm stuck on a problem I have. I have this XML file:
</member>
<member>
<name>TransactionID</name>
<value><string>123456789123456</string></value>
</member>
<member>
<name>Number</name>
... (9 Replies)
I have a file comp.pkglist which mention package version and release . In 'version change' and 'release change' line there are two versions 'old' and 'new' Version Change: --> Release Change: -->
cat comp.pkglist
Package list: nss-util-devel-3.28.4-1.el6_9.x86_64
Version Change: 3.28.4 -->... (1 Reply)
Discussion started by: Paras Pandey
1 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)