I have a tab delimited text file,
I need to add a line after the header line. The first and third field of that added line with both be the value 0 (hard coded). The middle field will be from a bash variable.
I have looked at solutions in both sed and awk and can't seem to find the right thing.
I tried,
But that garbles the values of the inserted and existing lines.
I'm needing to add a "hour:min" to the end of each line in a document. The document in this case is only going to be one line.
if this inserts it at the end, what needs to be changed to add something at the end...
/bin/echo "%s/^/$filler/g\nwq!" | ex -s $oFile
Thank you... (2 Replies)
Hi,
I wanted to add specific text to each row in a text file containing three rows. Example:
0 8 7 6 5 5
7 8 9 0 7 9
7 8 9 0 1 2
And I want to add a 21 at the beginning of the first row, and blank spaces at the beginning of the second two rows. To get this:
21 0 8 7 6 5 5
7 8... (4 Replies)
hello i need some help here are the contents of my file.
test.txt
this is filename 1.mp3 http://www.url.com/filenamehashed
filename 2.mp3 http://www.url.com/fileamehashed
something_else.zip http://www.url.com/filenamehashed
so this file has 100 of these lines
filename url
I would... (9 Replies)
Dear Friends,
I have a flat file where last line of it has word D$mhtt
I want to add a space and back slash after it.
Also wanna add -S "J" in the last line.
Following example will make it clear.
I have this in the last line of file
D$mhtt
I want
D$mhtt \
-S "J"
Please... (5 Replies)
I have a text file that has data like:
Data "12345#22"
Fred
ID 12345
Age 45
Wilma
Dino
Data "123#22"
Tarzan
ID 123
Age 33
Jane
I need to figure out a way of adding 1,000,000 to the specific lines (always same format) in the file, so it becomes:
Data "1012345#22"
Fred
ID... (16 Replies)
Hi,
I want to add a text to the end of the specific line in a file. Now my file looks like this:
999
111
222
333
111
444
I want to add the string " 555" to the end of the first line contaning 111. Moreover, I want to insert a newline after this line containg the "000" string. The... (8 Replies)
Hey guys,
I need to write a script that will add a specific text at the end of a specific line (of a text file). but the line is a variable
this is my text file :
device_2 ansible_ssh_host=127.0.0.1 ansible_ssh_port=30000 ansible_ssh_user='root'
device_2 ansible_ssh_host=127.0.0.1... (1 Reply)
Hi,
I am doing something like below:
cat file1>file3and
cat file2>>file3
I wanted to check if there is a way to write a custom message(hardcoded message)something like below at the beginning of each line then PIPE delimitiation and then followed by remaining record.
cat file1... (7 Replies)
the first line of every unix script written in an interpreted language always has a "#!<path-to-the-language>"
is there a way to include other text in that first line without it affecting the ability of the script to run???
for instance, if i change the following line:
#!/bin/sh
echo blah... (1 Reply)
Discussion started by: SkySmart
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)