10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I am trying to grep a variable with multiple lines with multiple patterns
below is the pattern list in a variable called "grouplst", each pattern is speerated by "|"
grouplst="example1|example2|example3|example4|example5|example6|example7"
I need to use the patterns above to grep a... (2 Replies)
Discussion started by: ajetangay
2 Replies
2. Shell Programming and Scripting
Hi Experts,
I have a log file like this.I need to filter the Index name and elapsed time(only created ).
06:36:39 SQL> create index XYZ_F75 on XYZ
06:36:39 2 ("GRP_ID", "_ID") parallel 64 nologging
06:36:39 3 tablespace XARGS_IDX
06:36:39 4 ;
Index created.
Elapsed:... (2 Replies)
Discussion started by: navsan420
2 Replies
3. Shell Programming and Scripting
/etc/group
tiadm::345:mk789,po312,jo343,ju454,ko453,yx879,iy345,hn453
bin::2:root,daemon
sys::3:root,bin,adm
adm::4:root,daemon
uucp::5:root
/etc/passwd
mk789:x:234:1::/export/home/dummy:/bin/sh
po312:x:234:1::/export/home/dummy:/bin/sh
ju454:x:234:1::/export/home/dummy:/bin/sh... (6 Replies)
Discussion started by: chidori
6 Replies
4. UNIX for Dummies Questions & Answers
I have a file with the following text:
grep \$
grep \\$
grep \\\$
grep '\$'
grep '\'$'
grep \\
grep \\\\
grep "\$"
grep '"$'
grep "$"
When I perform these same commands on this file, the result are never what I would expect them to be. Could someone please comment on the results and... (3 Replies)
Discussion started by: uran101
3 Replies
5. Shell Programming and Scripting
Hi,
I have a master file that i need to split into multiple files based on matched patterns. sample of my data as follows:-
scaff_1 a e 123 130 c_scaff_100
scaff_1 a e 132 138 c_scaff_101
scaff_1 a e 140 150 ... (2 Replies)
Discussion started by: redse171
2 Replies
6. Shell Programming and Scripting
Hi All,
I've been trying solve this with a simple command but not having much luck. I have a file like this:
Line 1: random_description 123/alert/high random_description2 356/alert/slow
Line 2: random_description3 654/alert/medium
Line 3: random_description4 234/alert/critical
I'm... (7 Replies)
Discussion started by: joe19
7 Replies
7. Shell Programming and Scripting
Hi
I have a file containing 1000+ lines of netlist data.
I need to search for text between two key words on each line
for e.g my input file has
"ABC.ABC__312.deftr_0.X143.Xntys_0.\Xetabc__ABC_test_tz .X1023" "ABC.ABC__312.asjartwtsj"... (16 Replies)
Discussion started by: naveen@
16 Replies
8. Shell Programming and Scripting
i want to match a pattern
* ^Subject:.*<\hello\>
for my emails to me that has 'hello' anywhere in the subject. (3 Replies)
Discussion started by: oxoxo
3 Replies
9. Shell Programming and Scripting
suppose u have a file
ACFCFACCACARCSHFARCVJVASTVAJFTVAJVGHBAJ
another file
A
C
F
R
then output shud be
A= 9
C=7
F=3
R=2
Thanks (12 Replies)
Discussion started by: cdfd123
12 Replies
10. UNIX for Advanced & Expert Users
Hi Gurus,
I have a file
1|usa|hh
2|usa|ll
3|usa|vg
4|usa|vg
5|usa|vg
6|usa|vg
7|usa|ll
8|uk|nn
9|uk|bb
10|uk|bb
11|kuwait|mm
12|kuwait|jkj
13|kuwait|mm
14|dubai|hh
I want to group by last two columns and get the last two recs and count. (3 Replies)
Discussion started by: sumeet
3 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)