Hi. I'd like to have an IF-Then-Else statement where I can check to see if a file exists? We have the Bourne Shell by default. I'm looking for the syntax to do something like this:
if myfile.txt exists then
...my code
else
...my code
end if
Any help would be greatly... (5 Replies)
Hi,
I am trying to write a script which checks if any file exists with "*.log" or "*.out" in Directory
below is the code
#------------------
path=/abd/xyz/
if ; then
echo "Good"
else
echo "Failure"
fi
#--------------------------
its always going to else part and printing... (8 Replies)
I lookifn for a way to SFTP a file based on the presence of a flag file .
The logic is some thing like this in shelling terms
IF ]; then
download file.DDMM.dat
FI
The above is just the way of interpreting the logic.
Just want to add that i do not have SSh access to the remote... (2 Replies)
I want to write a script to see if various files exist. What I want to do is have the script search in various directories if a file exist, and if not, then output something like "/path/file does not exist". I don't actually know of how to check and see if a file exists or not. What I have in mind... (2 Replies)
Hi
#Testing for file existence
if ; then
echo 'SCHOOL data is available for processing'
else
echo 'SCHOOL DATA IS NOT AVAILABLE FOR PROCESSING'
:
i wrote a script, where it begins by checking if file exists or not.
If it exists, it truncates the database... (2 Replies)
Hi Gurus,
I have a requests to find if all the file in the filelist exist in certain directory.
example:
my filelist
abc
def
ddd
cde
afg
how can I find these 5 files exists at director /home/abc
Thanks in advance (7 Replies)
Hi,
I want to check if the file exists or not in the directory.
i am trying below code but not working.
File="/home/va59657/Account_20090213*.dat"
echo "$File"
if ]; then
echo "file found"
else
echo "file not found"
fi
However i am getting file not found even if file exits as... (5 Replies)
Hi all,
One of my script crated created 2 files in a dirs Output.log and Output.tmp. Now in another script i need to check if both of the above mentioned files are present in a directory or not.
I know to check one file but need to check both the files.
Anyone could please tell me how... (3 Replies)
Hi,
I have the below code written. However I am not getting the desired output
I am checking if the particular path has file in it.
#!/bin/bash
ls -l /IRS2/IRS2_ODI/INFILE/*LS* 1>/dev/null 2>/dev/null
if
then
echo $?
echo "File Exists"
fi
... (3 Replies)
I need to check whether a file exists and has been changed.
The file should contain a specific string. The file should also have been changed within the last ten seconds.
How do I do that? (3 Replies)
Discussion started by: locoroco
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)