05-23-2015
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
#!/bin/csh -f
echo "Enter MEUPS User Id :-"
read UID
echo "You entered $UID"
---------------------------------------
Whn executed, I get an error message "UID: Undefined variable" (1 Reply)
Discussion started by: Kartheg
1 Replies
2. Shell Programming and Scripting
Hi
following is a simple shell script,
--------------------------------
#!/usr/bin/tcsh
u=$USER
echo $u
string="cp c2960-lanbase-mz /tftpboot/$u/c2960-lanbase-mz"
string2="cp c2960-lanlite-mz /tftpboot/$u/c2960-lanlite-mz"
output=/users/$u/c2960-log.txt
if &&
then
echo... (1 Reply)
Discussion started by: amitrajvarma
1 Replies
3. Shell Programming and Scripting
Hi all,
Im using a script which contains read command.. the script works perfectly but when I alias the script it gave "undifined variable" after I enter the read command input (variable)...
Does any one know why ? (4 Replies)
Discussion started by: yahyaaa
4 Replies
4. Shell Programming and Scripting
Hello,
#this script renames schematic file for model year change
#my = model year prefix
my="lsd"
for i in 'ls lsb*'
do
old=$i
new='echo $i | cut - c4 - c30'
mv $i $my$new
end
i: Undefined variable
What am I missing or doing wrong? (6 Replies)
Discussion started by: dtrescott
6 Replies
5. Shell Programming and Scripting
Below csh script gives error: Undefined variable:confused:
#!/bin/csh
$QUERY="netscape";
COUNT_NETSCAPE=${ps | grep -c $QUERY};
echo $COUNT_NETSCAPE;
when run gives error
adroit:/home/seo/hitendra 64 ] ./unix_6.sh
QUERY: Undefined variable.
What is the root cause of the... (3 Replies)
Discussion started by: hiten.r.chauhan
3 Replies
6. Shell Programming and Scripting
Below script cuts date part from the date entered by the user.
#!/bin/csh
echo 'Enter date in the format dd/mm/yyyy'
read DATE
DD=`echo $DATE | cut -c1-2`
echo $DD;
when debug with -x option , it works perfectly but without -x doesnot.:confused:
$ sh -x unix_12.sh
+ echo Enter... (2 Replies)
Discussion started by: hiten.r.chauhan
2 Replies
7. Shell Programming and Scripting
Hello group,
Still fairly new at the whole scripting thing so be gentle. I'm trying to write a simple script that archives my log files into a master log broken into weeks of the year.
My script runs fine up till the "cat" lines which I get a undefined or illegal variable name error. But... (2 Replies)
Discussion started by: dpreviti
2 Replies
8. Emergency UNIX and Linux Support
hi there
I have this C shell script that was migrated from AIX to Linux, could someone please help me, I checked the syntax numerous times but I can't find out where the error is. The script is meant to find files older than 27 days and delete it
#!/usr/bin/csh
#
... (22 Replies)
Discussion started by: hedkandi
22 Replies
9. Ubuntu
Hi,
i am a beginner in ubuntu. my default shell is bash. everytime i try to change the shell with command "csh", i get a message (probably an error message). after i get into c-shell, when i try to execute a c shellscript, then it showed the same message. any idea about what is this about or any... (1 Reply)
Discussion started by: Avinash Nayak
1 Replies
10. UNIX for Beginners Questions & Answers
i keep getting this error when i ssh using my id - any idea (2 Replies)
Discussion started by: tariq_m
2 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)