08-14-2014
Hello
kieranfoley,
I have a few to questions pose in response first:-
- Is this homework/assignment? There are specific forums for these.
- What have you tried so far?
- What output/errors do you get?
- What OS and version are you using?
- What are your preferred tools? (C, shell, perl, awk, etc.)
- What logical process have you considered? (to help steer us to follow what you are trying to achieve)
Most importantly,
What have you tried so far?
There are probably many ways to achieve most tasks, so giving us an idea of your style and thoughts will help us guide you to an answer most suitable to you so you can adjust it to suit your needs in future.
We're all here to learn and getting the relevant information will help us all.
10 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
I often use "ps -ef" command to list all running processes. Now i want to customize the output to show only 2 parts: CMD and UID as below:
/bin/bash /usr/bin/run-parts /etc/cron.weekly root
/usr/sbin/httpd apache
/usr/sbin/httpd apache
/usr/sbin/httpd apache
I use ps -ef | awk '{print $8"... (3 Replies)
Discussion started by: fongthai
3 Replies
2. Shell Programming and Scripting
I am definitely not an expert with awk, and I want to reformat a text file like the following. This is probably a very easy one for an expert out there. I would like to keep the lines in the same order, but move the heading to only be listed once above the lines.
This is what the text file... (7 Replies)
Discussion started by: linux4life
7 Replies
3. UNIX for Advanced & Expert Users
Hi colleagues,
I have the followind script.
db2 -x "select substr(TBSPACE,1,20) TABLESPACE from syscat.tables where tabschema = 'SCHEMA' and tabname like '%XXXX' group by TBSPACE order by TBSPACE" | awk '{print $1}' | while read tablespace
do
db2 "list tablespaces show detail" |grep -p -w... (5 Replies)
Discussion started by: systemoper
5 Replies
4. Shell Programming and Scripting
We have the following output:
server1_J00_data_20120711122243
server1_J00_igs_20120711122243
server1_J00_j2ee_20120711122243
server1_J00_sec_20120711122243
server1_J00_data_20120711131819
server1_J00_igs_20120711131819
server1_J00_j2ee_20120711131819
server2_J00_data_20120711122245... (10 Replies)
Discussion started by: ux4me
10 Replies
5. Shell Programming and Scripting
Hello:
When I tried a perl-oneliner to re-format fasta file.
infile.fasta
>YAL069W-1.334 Putative promoter
CCACACCACACCCACACACC
ACACCACACCCACACACACA
ACAGCCCTAATCTAACCC
>YAL068C-7235.2170 Putative ABC sequence
TACGAGAATAATTT
ACGTAAATGAAGTT
TATATATAAA
>gi|31044174|gb|AY143560.1|... (15 Replies)
Discussion started by: yifangt
15 Replies
6. Shell Programming and Scripting
I have below file listing
] ls -1 *.txt
MISTradesReport_141105_d130240_VOLCKER_EMEA_LOANIQ_FEED_2013-12-24.txt
MISTradesReport_141106_d130240_VOLCKER_NA_LOANIQ_FEED_2013-12-24.txt
MISTradesReport_141107_d130240_VOLCKER_EMEA_CDS_CRDI_FEED_2013-12-24.txt... (4 Replies)
Discussion started by: krg.sati
4 Replies
7. Shell Programming and Scripting
Data:
0,mfrh_green_screen,1455432969,37540,/prod/test/system/sys/unikixmain.log,3.0M,mfrh_green_screen,3120660,0,36964--37540
0,mfrh_green_screen,1455433269,38100,/prod/test/system/sys/unikixmain.log,3.1M,mfrh_green_screen,3164223,0,37540--38100... (1 Reply)
Discussion started by: SkySmart
1 Replies
8. Shell Programming and Scripting
I need to rearrange the output but i am unable to arrange it to match the format. In the output i need NAME=\"To in the column .
Bash:
#!/bin/bash
cd /cygdrive/c/output/a
cat *.txt > output.txt
i=/cygdrive/c/output/a/output.csv
#echo "NE_Name, Source, Destination, OSPF_AREA_ID"... (4 Replies)
Discussion started by: adgjmpt
4 Replies
9. Shell Programming and Scripting
Howdy. AWK beginner here. I need to reformat a text file in the following format:
TTGS08-2014001 6018.00 143563.00 ... (2 Replies)
Discussion started by: c47v3770
2 Replies
10. Shell Programming and Scripting
The below awk improved bu @MadeInGermany, works great as long as the input file has data in it in the below format:
input
chrX 25031028 25031925 chrX:25031028-25031925 ARX 631 18
chrX 25031028 25031925 chrX:25031028-25031925 ARX 632 14... (3 Replies)
Discussion started by: cmccabe
3 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)