Dear All
I am facing a problem with my script.
I have to found the primary group of users .
So first I selected all the groups and users register from a specific user : ONE
Then I am making a file with all groups attached to the user : ONE
Then I am making a file with all... (8 Replies)
echo -e "Enter in a username : \c"
read username
grep "^$username:" /etc/passwdWhat I'm trying to do is take in a username from my script and I need to be able to check if that username already exists. If it does the script should display a message saying that the user already exists and exit.
... (2 Replies)
I want to create a shell script for a menu selection consisting of users defined on the machine. To an administrator having the privileges, the selection menu will look as follows:
Select the user you want to define the variables for:
1) my-username-1
2) my-username-2
etc
Then there would be a... (7 Replies)
Hi, I am a new on this forum but i like :) I need a script in bash which will be crating a new user with folder for websites. For example: I will run this program and he creating a new user(with my name) and folder whcich name like user and if i will localho/~user in browser, she show me files from... (1 Reply)
Hi Experts,
I am new to scripting. We have around 400 Linux servers in our environment. I want to add a new user to a perticular group on all the servers using SSH.
Requirements:
1) Need to take the server names from a text file.
2) Login into each server and check whether perticular... (1 Reply)
Hello Everybody
i am a newbie to the bash scripting.please can someone help me out here.i want to write a script on creating 10 users with passwords and comparing the users to the ones in /etc/passwd file.am i gonna use arrays in creating the 10 users or what?and again, how do i compare both... (1 Reply)
Hi friends could you please share me the script to create more users in one server except newusers, is there any option to change secondary group and how to print passwd and changing the age all these things how can i edit in newsers.. please help me (0 Replies)
for UserName in `cat users` ; do useradd -d /u02 -s /usr/libexec/openssh/sftp-server -G ftp-users $UserName ;
PassWord=$( echo $( tr '' '' <<< ${UserName:0:1} )${UserName:1} ) ;
echo "$PassWord@123" | passwd $UserName --stdin ; done
can some one explain what the bold text do
Please use... (5 Replies)
Discussion started by: James0806
5 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)
11-17-2017
