10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Whenever i switch from root to another user, by doing su - user, it takes me to home directory of user. This is very annoying as i want to be in same dir to run different commands as root sometimes and sometimes as normal user.
How to fix this? (1 Reply)
Discussion started by: syncmaster
1 Replies
2. UNIX for Dummies Questions & Answers
I need to do a switch user in an automated mode and do a ftp using that switched id.
Scenario:
initial login xx.
switch to user-yy without manually entering the password.
ftp some files from user yy to another user zz - automated mode.
Can any unix experts can help me for my above query? (9 Replies)
Discussion started by: mjdarm
9 Replies
3. UNIX for Advanced & Expert Users
I need to do a switch user in an automated mode and do a ftp using that switched id.
Scenario:
initial login xx.
switch to user-yy without manually entering the password.
ftp some files from user yy to another user zz - automated mode.
Can any unix experts can help me for my above query? (1 Reply)
Discussion started by: mjdarm
1 Replies
4. Shell Programming and Scripting
Hi,
what is the use of the double quotes and !! in the following code segment:
su - user1 << ""!! > /dev/null 2>&1
echo "welcome user1"
EOF
!!
also what is the difference between below:
su - user1 << ""!! > /dev/null 2>&1 and
su - $USER << ""!!!> /dev/null 2>&1.
Note: $USER =... (2 Replies)
Discussion started by: bjagadeesh
2 Replies
5. Shell Programming and Scripting
Hi,
what is the use of the double quotes and !! in the following code segment:
su - user1 << ""!! > /dev/null 2>&1
echo "welcome user1"
EOF
!!
also what is the difference between below:
su - user1 << ""!! > /dev/null 2>&1 and
su - $USER << ""!!!> /dev/null 2>&1.
Note: $USER =... (1 Reply)
Discussion started by: bjagadeesh
1 Replies
6. Shell Programming and Scripting
Hi,
I have a shell script in which I need to switch to another user and execute some commands and then come back to the original user.
To make it more clear -
I have to log in as user root then 'su' to jag - execute a script called backup.sh and then logout and come back to root again..
... (1 Reply)
Discussion started by: bjagadeesh
1 Replies
7. Shell Programming and Scripting
Good day Guys!!!
I am currently making a script in AIX, the script runs a SAS job, the owner of the script is the root, but the SAS jobs cannot be run by the root, as it should be run by a user 'sasia'. But inside the script, root creates a logfile, so what I need is just to su to sasia for the... (3 Replies)
Discussion started by: sasia
3 Replies
8. UNIX for Dummies Questions & Answers
Running the following shell script,
#!/usr/bin/ksh
set -x
swdofile=/opt/SWDO_IN1V01P001_1.csv
USER='myusername'
PASSWD='mypassword'
HOST='myhostname'
ftp -n $HOST << SCRIPT
quote USER $USER
quote PASS $PASSWD
su - BRA -c put $swdofile
quit
SCRIPT
exit 0
but not managing to get the... (1 Reply)
Discussion started by: daveaasmith
1 Replies
9. Shell Programming and Scripting
I am writing a script that has some tasks that must be run as root, then set of tasks to be run as normal user, then again as root.
is there a way to switch between users in a script?
any other alternatives?
thx (3 Replies)
Discussion started by: melanie_pfefer
3 Replies
10. UNIX for Dummies Questions & Answers
Hello everyone,
I need to make a OS full backup. I am using the vdump command but first, I must to switch to the single-user mode.
I am working on a Compaq Tru64 Unix V4.0G.
Please, could somebody tell me which is/are the commands to do it?
I appreciate your help
Gastón (1 Reply)
Discussion started by: gmoyano
1 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)