10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
If I have a file like the following
abc.1
abc
abc_1
abc..1
abc*1
abc@1
abc def ghr
def......
ddef 5466 def ed
def** 123445
I`m trying to find exact words from the list
abc
def (4 Replies)
Discussion started by: ritakadm
4 Replies
2. Shell Programming and Scripting
How to match a shell variable that contains parenthesis (and other special characters like "!")
file.txt contains:
Charles Dickens
Matthew Lewis (writer)
name="Matthew Lewis (writer)";
awk -v na="$name" ' $0 ~ na' file.txt
Ideally this would match $name in file.txt (in this... (3 Replies)
Discussion started by: Mid Ocean
3 Replies
3. Shell Programming and Scripting
Hi all,
Case 1 :
A=88^M
&& echo "PASS"
Result:
PASS
Case 2:
A=88
&& echo "PASS"
Result:
PASS
I would like to know why Case 1 and Case 2 got the same result? What make ^M ignored ?
Thanks in advance. (6 Replies)
Discussion started by: montor
6 Replies
4. Shell Programming and Scripting
Hi, im asking for help with the next script:
echo ^;
then
if
then
printf "\033
query1.sh:
export TERM=vt100
export ORACLE_TERM=at386
export ORACLE_HOME=/home_oracle8i/app/oracle/product/8.1.7
export ORACLE_BASE=/home_oracle8i/app/oracle
export... (8 Replies)
Discussion started by: blacksteel1988
8 Replies
5. Shell Programming and Scripting
Hello,
I'm trying to write a simple (korn) shell script which is called from the command line with some parameters. But one of the parameter contains a "!" sign. For example: myscript.ksh foo bar foo!bar
When I call the script like above I always get an error. So I tried to wrap the... (1 Reply)
Discussion started by: merlinhst123
1 Replies
6. Shell Programming and Scripting
Hi all,
I would like to ask if there's something wrong with my if - else condition, i couldn't run the script perfectly due to the error in my if - else condition stating that "test: 0403-004 Specify a parameter with this command."
below is the snippet of my script
if && && ]
then echo... (5 Replies)
Discussion started by: jihmantiquilla
5 Replies
7. Shell Programming and Scripting
Hey Guys,
I have a program that populates a database based on input I feed it.
so it would look like:
cmd arg1 arg2 ... argN
Now some of the arguments have special characters in them so I wrote a small script to pull the args and wrap them in quotes ('arg'). The problem is sometimes... (10 Replies)
Discussion started by: aaron0001
10 Replies
8. UNIX for Advanced & Expert Users
I'm using Korn shell. I'm doing an IF TEST for lots of characters and don't know how to also check for single quote and parentheses and slash. I'm reading a file and some records have garbage characters in them. The following works, but how do I add single quote, parentheses and slash to the IF... (3 Replies)
Discussion started by: sboxtops
3 Replies
9. Shell Programming and Scripting
Hello,
Getting error "A test command parameter is not valid" when trying to run the code below under /sbin/sh
AA = "12:00"
CHK=$(date +"%H:%M")
if
then
print "Yes"
fi
Getting 2 errors:
1) "AA: not found"
2) "Specify a parameter with this command"
Thanks,
IS
Please... (5 Replies)
Discussion started by: schureki
5 Replies
10. Shell Programming and Scripting
Hi
I am getting few messages when trying to run my script from the following lines in the script
if test
then
// SomeCode
fi
The messages are as follows:
testing.sh: OBLIGOR_GROUP_ID: 0403-012 A test command parameter is not valid.
testing.sh:... (5 Replies)
Discussion started by: skyineyes
5 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)
