Shell does not give you decimal points. You can multiply ahead to get what you want, though, if you know the result will be 0-99 and not above.
You forgot the multiply by 100 in your bc statement, so your answer is 0.0099, not 0.99. Do that first in your bc statement (i.e. multiply a by 100, not the result of a/b) and it works fine.
Lastly, the way to avoid divide-by-zero errors is to not divide by zero Check your values before you calculate.
Actually, I thought scale & bc are for division and thinking to multiply the result with 100. But I am wrong. Following worked for me:
How can I avoid script hangup when divide by Zero happens. Validating the variable is the only way? or any otherway in Unix. Actually I need to display 0 when it happens.
---------- Post updated at 10:12 PM ---------- Previous update was at 10:11 PM ----------
I am trying to do a shell script to monitor if any files went through in the last hour.
There is a script in cron that runs every sec checking to see if a file is there and ftp the file out of this folder.
Now I just want to add a block of code that will check to see no files went in the last... (3 Replies)
I am writting a script in the ksh shell and am trying to find a way to report the total execution time of the script without requiring the user to specify the time function when executing the script.
Does anyone have any examples they have used. I have been setting up two date variables (one at... (1 Reply)
I am begining to learn bourne shell and as a practice I have written a script which when given the purchase price and percentage of discount calculates the savings.
I somehow cannot figure out why my script fails to do arthimatic calculation on real numbers.
Could anyone look at the script... (5 Replies)
Hello everybody,
I decided to take a Unix Introduction class and have never had experience with programming. Everything was fine until recently when the Prof. started shell scripting and he wants us to make a small script to add unlimited numbers from arguments and from standard input.
I... (1 Reply)
Hello everybody,
I decided to take a Unix Introduction class and have never had experience with programming. Everything was fine until recently when the Prof. started shell scripting and he wants us to make a small script to add unlimited numbers from arguments and from standard input.
I... (8 Replies)
Hi all,
Thanks in Advance , i am very new to programming part in script i think using some caluations+ sed command only we can do this process in script.
for exampl:
i have file in that one line is like this
using sed i can replace the date and all but my requirement is
The... (3 Replies)
I have 2 numbers
xmin = 0.369000018
xmax = 0.569000006
and want to calculate
(xmax- xmin) / 5.0
I have tried using $(( )) but is always giving an error (8 Replies)
Dear All,
I read some variables in a file and assigned as name for each of them.
If I do echo I am able to see the values as 1.0E-05,3.4,5.0E-03 etc,
Now I want to do some mathematical operations with them.
Lets say
1
1.0E-05*5.0E-03
expected ans is 5.0E-08
2
1.0E-05/5.0E-03
expected... (9 Replies)
Discussion started by: linuxUser_
9 Replies
LEARN ABOUT DEBIAN
service
service(8) System Manager's Manual service(8)NAME
service - run a System V init script
SYNOPSIS
service SCRIPT COMMAND [OPTIONS]
service --status-all
service --help | -h | --version
DESCRIPTION
service runs a System V init script in as predictable an environment as possible, removing most environment variables and with the current
working directory set to /.
The SCRIPT parameter specifies a System V init script, located in /etc/init.d/SCRIPT. The supported values of COMMAND depend on the
invoked script. service passes COMMAND and OPTIONS to the init script unmodified. All scripts should support at least the start and stop
commands. As a special case, if COMMAND is --full-restart, the script is run twice, first with the stop command, then with the start com-
mand.
service --status-all runs all init scripts, in alphabetical order, with the status command.
EXIT CODES
service calls the init script and returns the status returned by it.
FILES
/etc/init.d
The directory containing System V init scripts.
ENVIRONMENT
LANG, TERM
The only environment variables passed to the init scripts.
SEE ALSO
/etc/init.d/skeleton,
update-rc.d(8),
init(8),
invoke-rc.d(8).
Jan 2006 service(8)