10 More Discussions You Might Find Interesting
1. UNIX for Beginners Questions & Answers
Running this code
df -h | head -2 | awk '{print $8}'
Gives me the following output:
%iused
6%
What I'm trying to do is get the 6% but I'm having trouble doing this using cut -c, I think that this could be because the text is on different lines; is there a way of doing this? (8 Replies)
Discussion started by: $shell_Learner
8 Replies
2. Shell Programming and Scripting
hi experts,
I have a flat file with below contents
Database1 Table1 column1
Database1 Table1 column2
Database1 Table1 column3
Database1 Table1 column4
Database1 Table2 Column1
Database1 Table2 Column2
Database2 Table1 Column1
Database2 Table1 Column2
Database2 Table1 Column3... (9 Replies)
Discussion started by: Selva_2507
9 Replies
3. Shell Programming and Scripting
I have a file
# cat /root/llll
11
22
33
44
When I cat this file content to a variable inside a shell script and echo that shell script, it does not show up as separate lines. I need echo output similar to cat.
cat /root/shell_script.sh
#!/bin/bash
var=`cat /root/llll`
echo $var (2 Replies)
Discussion started by: anil510
2 Replies
4. Shell Programming and Scripting
Hi, i have a file containing nrows and 3cols. i want to cut it in specific length and save output to individual files.
1 2 3
4 5 6
5 8 9
10 11 12
13 14 15
16 17 18
i need to cut the file say every 2 rows and save it in individual file.
01.dat contains
1 2 3
4 5 6
02.dat
7 8 9... (10 Replies)
Discussion started by: ida1215
10 Replies
5. Shell Programming and Scripting
Hi,
I am new to scripting and need help in cutting strings from output of a command. For exapmle in am getting the following as the out out from the command i run:
Out Condition: Askajdsdfa | date: 1204 | oper: +
I need to get the output as Askajdsdfa and 1204.
Thanks (3 Replies)
Discussion started by: hraj1984
3 Replies
6. Shell Programming and Scripting
Hi,
I'm using AIX(ksh shell).
> cat temp.txt
"a","b",0
"c",bc",0
"a1","b1",0
"cc","cb",1
"cc","b2",1
"bb","bc",2
I want the output as:
"a","b","c","bc","a1","b1"
"cc","cb","cc","b2"
"bb","bc"
I want to combine multiple lines into single line where third column is same.
Is... (1 Reply)
Discussion started by: samuelray
1 Replies
7. Shell Programming and Scripting
I have a file that contains several thousands rows. Here is an example.
^411912$
^487267$
^643776$
^682249$
^687737$
^692328$
^693767$
^695483$
^697289$
^757411$
^776688$
^778953$
^806123$
^872262$
^877877$
^839837$
^76666$
^72018$
^23330$ (3 Replies)
Discussion started by: justinb_155
3 Replies
8. Shell Programming and Scripting
Hello all
I'm using bourne shell and need to figure out how to cut out a specific portion of some output. For example, my output from my command is:
12.12.52.125.in-addr.arpa name = hostname.domain.main.gov
I need to get just the "hostname.domain.main.gov" part. What I'm trying... (9 Replies)
Discussion started by: lee.n.doan
9 Replies
9. Shell Programming and Scripting
Hello, I'm starting from the scratch with Unix, and I was wondering if you could give me an answer for this problem...
I've got a column with different names of files, something like:
./file1
./file2
...
Now, I would like to show the content of each file. The column with the names comes... (5 Replies)
Discussion started by: kalius88
5 Replies
10. Shell Programming and Scripting
I have a log file from which I want to cut out the ten lines assoictiated to my search requirment (cust_ref #).
The cust_ref number will be on te first line and the update information will be on the following ten lines (which dosen't linking data to grep on).
Using a script I would like to... (4 Replies)
Discussion started by: nhatch
4 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)