How to add one line in the beginning of the file? Post: 302907062

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

input a line at the beginning of every file in a directory?

if need to input a word or anything at the beginning of every file in a directory. how do i accomplish this? say the file is named hyperten. how do i make hyperten the first line of every file in a given directory? thanks

2. UNIX for Dummies Questions & Answers

Adding one string at the beginning of each line in a file

Hi, I have file a.txt as below. I want to add one string root beginning of each line. Sample file a.txt aaa bbb ccc Sample output Root aaa Root bbb Root ccc Can any one help me on this?

3. Linux

Add file's date at beginning of every line in file

How would I do that? /Rutger

4. Shell Programming and Scripting

add a number to the beginning of every line

hey, i would like to add a line number to the beginning like so: red blue green yellow will be: 1=>red 2=>blue 3=>green 4=>yellowplease advise thank u.

5. Shell Programming and Scripting

trying to add text to beginning and end of each line

Well here goes: I tried to write a batch file that adds a specific fixed text to each line of an already existing text file. for the adding text infront of each line I tried this: for /F "delims=" %%j in (list.txt) do echo.STARTTEXT\%%j >> list.txt for adding text after each line I...

6. Windows & DOS: Issues & Discussions

Trying to add text to the beginning of each line

7. Shell Programming and Scripting

Append file name to the beginning of each line

I want to append file names at the beginning of a line for each row file content abc.txt.gz 123|654|987 bcd.txt.gz 876|trf|kjh I want a single output file with below format abc.txt.gz|123|654|987 bcd.txt.gz|876|trf|kjh This one is working but only with unzip files,need to have...

8. UNIX for Dummies Questions & Answers

Add word/value at the beginning of each line in a file

how to add value/word at the beginning of each line in a file ? i have file number.txt and the output is below 1000 1001 1002 1003 1004 i want to add 000 at the beginning of each line, desire output is below 0001000 0001001 0001002 0001003 0001004 and so on please advise how...

9. UNIX for Dummies Questions & Answers

sed - Add a variable line to the end of a block beginning with a regex

Hi, Need some help with sed. I have a file that has sections : e.g. a=blah b=blah d=blah e=blah There's many sections in the file.

10. Shell Programming and Scripting

Add new line at beginning and end of a file

Hi, I have a specific requirement to add text at the beginning and end of a plain text file. I tried to use "sed" with '1i' and '$a' flags but these required two separate "sed" commands separated with "|". I am looking for some command/option to join these two in single command parameter. ...

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)