01-30-2014
What is your system? User management is one thing that differs a lot between different UNIX systems. uname -a
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Now, its been a while since i done this but I had to add a user to a group. I did that by using the usermod command and now when I superuser to the user's account and issue a "id", i get the desired gid.
i mean, output of id indicated the user is assigned to the group i want him to be in. ... (5 Replies)
Discussion started by: TRUEST
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2. UNIX for Dummies Questions & Answers
Hey everyone, I need a little help....
I need to add my root user to a new group I have created, I'm just alittle unsure how to do this.
I know I need to use the 'useradd' command, the user 'root' needs to be added to a new group called 'beoper' and retain his membership in the following... (7 Replies)
Discussion started by: The Specialist
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3. HP-UX
How can I add a user to a specific group without using SAM? I know I can user modprpw -G, but that will overwrite any groups the user is in with the ones I specify.
I need to assume that I do not know what groups the user is already in, so I can't put them in the modprpw command. I just need... (2 Replies)
Discussion started by: paqman
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4. BSD
Hello
I have a group called "media" which has a 7 access to a directory with the same name, my username was not included in that group, after vimming /etc/group and adding myself to it, I notice that that group is not defined as one of my groups (by issuing the "groups" command). I know that if... (1 Reply)
Discussion started by: sirbijan
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5. Solaris
Hi all,
I have a existing user user1 its group id dba
i have created a new user named: uta and added to group dba
my task for creating uta ( to ftp solaris server from /oracle/pcmia/dry1 & oracle/pcmia/dry2 and get some rdf ( database patch) and saved in one windows folder named d:\patch... (2 Replies)
Discussion started by: saurabh84g
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6. Shell Programming and Scripting
Hello guys!!
If a user is already created on a server, how do you add them to another group?
The useradd command? If so then would that duplicate the user account on the server?
Thanks
Bigben (4 Replies)
Discussion started by: bigben1220
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7. AIX
Hi,
I have a 2 node Cluster. Which is working in active/passive mode (i.e Node#1 is running and when it goes down the Node#2 takes over)
Now there's this requirement that we need a mount point say /test that should be available in active node #1 and when node #1 goes down and node#2 takes... (6 Replies)
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8. UNIX for Dummies Questions & Answers
Hi,
I have my new Unix machine setup. Its just have one user root.
I need to create a new user and add it to a group. I want this user to have privileges as root(run all command).
I know i need to use useradd command for this.My question is:
1) To which group i should add my user? DO i need... (2 Replies)
Discussion started by: kailash19
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9. Red Hat
Hi,
In the following output you can see the the user "richard" is a member on the team/group "developers":
# id richard
uid=10247(richard) gid=100361(developers) groups=100361(developers),10053(testers)
but in the following details of the said group (developers), the said user... (3 Replies)
Discussion started by: indiansoil
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10. UNIX for Beginners Questions & Answers
I believe there are two methods of adding a user to a group. using usermod and gpasswd. but most of the time we tent to use user mod. does there any difference between these two methods ....
gpasswd -a geek admins
usermod -a -G admins geek
both code add user geek to a group admin (1 Reply)
Discussion started by: lobsang
1 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)