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What is the best way to modify the crontab file??
Edit the file and then use crontab 'filename' ???
I do not know how to use pico editor - so I cannot modify it this way, Any help is appreciated. (3 Replies)
I saw a post on here a while back describing how to edit a crontab file when I'm not able to edit it via crontab -e.
Currently, if I try to do a crontab -e, it just comes back with:
# crontab -e
7987
<and then it just hangs there FOREVER>
If I do a crontab -l, it shows me all of the... (1 Reply)
hi
i need to change crontab settings as
minute,hour,day of month,month year,day of week
certain times. for that i need to go as crontab -e. i want to avoid that as its creating many problems in mysystem.
so here i m planning/trying to write a script that will update the settings in crontab... (8 Replies)
Hi
I am new to Unix and would like some assistance.
I need to edit the crontab file so that a script is set to run at 3:00 am each day.
When I telnet to the sun server and type crontab -e a black screen appears and I am unable to make any changes.
Could you advice on what is needed to... (11 Replies)
Hi..
At linux
I can edit crontab with command
$crontab -e
BUT I don't know to edit crontab at Solaris
because I tried with command $crontab -e
I can't do that
Can you help me...?
Thanks for solution
regards,
srilinux (25 Replies)
Hi All,
There are some cron jobs scheduled already by someone, now I have to make some changes to the schedule timings. Please advise me.
thanks,
Raju (2 Replies)
Hi,
I am new to Unix. I have written a script in Unix. I wanted to schedule this script in cronjobs which has to be run daily at 10AM.
Already i have some cron jobs running on my unix server. In addition to these I have to edit the crontab. I know I have to execute the command "crontab -e" to... (9 Replies)
Hi,
Can some one tell me if we can configure the jobs in crontab using a shell script.
I know it can be done easily by using "crontab -e", but i just want to know whether we can add a job into the crontab using a shell script.
If it can be done, plz suggest the procedure to do it.
If it... (6 Replies)
Hi Guys,
I need to edit the crontab on one of my unix systems. When I execute crontab -e, nothing happens, then I get an error '666' and can't type anything else at the cli.
I tried resizing the window, but still got the same error. I'm using the run user and I've checked the permissions on... (0 Replies)
Hi,
I have a solaris 10 box. And I want to schedule a cronjob.But it gives the following error
bash-3.2$ crontab -l
crontab: can't open your crontab file.
bash-3.2$ EDITOR=vi
bash-3.2$ export EDITOR
bash-3.2$ crontab -e
crontab: can't open your crontab file.
I checked in... (12 Replies)
Discussion started by: Rossdba
12 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)