Before I state my problem I would like to inform you that this is not an assignment. I'm just trying to learn some shell programming in my free time.
I'm trying to write a parking fee calculator. But I don't seem to be able to use fractional numbers. Could you please advice me on how to proceed?
Code:
#while duration is greater than 1
while [[ $DURATION -gt 1 ]]
do
FEE=$((FEE + 2)) #I can't seem to make add fractional numbers
DURATION=$((DURATION-1))
done
cat dailyreports | grep "Important list" | awk -F":" '{print $2}' | awk -F" " '{print $1}'
hey guys, after running the above combination of cat and awk, i get the below output:
3
4
2
9
now, i need to add these numbers up all in one line. i dont know what to add to that cat and awk one... (2 Replies)
Hi All,
Is it possible in Unix shell script to extract numbers from a string containing ".", such as;
5.2.314
And store in variables so;
var1 = 5
var2 = 2
var3 = 314
Thanks in advance for any help anyone can provide
dave (6 Replies)
I wish to give line number from one point to another in sed command like this
sed -n 1,1000000p file1.txt >file2.txt
but variable line number $x,$x+100000 can i give it cos i tried and it was giving an error any suggestions?/
Thx in advance
AC (2 Replies)
Dear pal,
I want to read only numbers thru a shell script,
If user is trying to enter character it should block that ...
Pls help to me find out a solution (2 Replies)
Hi everyone, I am having some problems with my scripts so I hope you could help me.
I am trying to store the result of a division in a variable in tcshell but I have the problem that if:
For example, dividing 2/100 the result is 0.02 but if I store that I have "0".
How can I have 0.02... (8 Replies)
if i want to display the contents of a file between say line number 3 and 10 then i use the following command
sed -n '3,10p' filename
if this 3 was contained in x and 10 was contained in y then how wud this command modified?
sed -n '$x,$yp' filename does not work..please advise (2 Replies)
Hello,
I have a case where I need to process an environment variable text value in CShell to calculate the product of 2 numbers stated in the variable string having the format "<first_number>Letter x<second_number>".
Ex: $VAR = "24x20"
I need to set $VAR_PRODUCT = "Product of 20 and 24"... (3 Replies)
Hi, I need to run a Fortran program which reads a input file with a fixed name many times, each time I need to change a number (real) in that input file, this is how I currently do it and I know it is not elegent at all:
cp inputfile.dat backup.dat
sed -i 's/28.0/0.01/g' inputfile.dat
./myCode... (3 Replies)
a=1 456
b=4928
c=23
d=456
I want to compare four variables to get the name of the variable having the highest number (2 Replies)
Discussion started by: proactiveaditya
2 Replies
LEARN ABOUT BSD
timeout
TIMEOUT(1) User Commands TIMEOUT(1)NAME
timeout - run a command with a time limit
SYNOPSIS
timeout [OPTION] DURATION COMMAND [ARG]...
timeout [OPTION]
DESCRIPTION
Start COMMAND, and kill it if still running after DURATION.
Mandatory arguments to long options are mandatory for short options too.
--preserve-status
exit with the same status as COMMAND, even when the
command times out
--foreground
when not running timeout directly from a shell prompt,
allow COMMAND to read from the TTY and get TTY signals; in this mode, children of COMMAND will not be timed out
-k, --kill-after=DURATION
also send a KILL signal if COMMAND is still running
this long after the initial signal was sent
-s, --signal=SIGNAL
specify the signal to be sent on timeout;
SIGNAL may be a name like 'HUP' or a number; see 'kill -l' for a list of signals
--help
display this help and exit
--version
output version information and exit
DURATION is a floating point number with an optional suffix: 's' for seconds (the default), 'm' for minutes, 'h' for hours or 'd' for days.
If the command times out, and --preserve-status is not set, then exit with status 124. Otherwise, exit with the status of COMMAND. If no
signal is specified, send the TERM signal upon timeout. The TERM signal kills any process that does not block or catch that signal. It
may be necessary to use the KILL (9) signal, since this signal cannot be caught, in which case the exit status is 128+9 rather than 124.
BUGS
Some platforms don't currently support timeouts beyond the year 2038.
AUTHOR
Written by Padraig Brady.
REPORTING BUGS
GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
Report timeout translation bugs to <http://translationproject.org/team/>
COPYRIGHT
Copyright (C) 2017 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
SEE ALSO kill(1)
Full documentation at: <http://www.gnu.org/software/coreutils/timeout>
or available locally via: info '(coreutils) timeout invocation'
GNU coreutils 8.28 January 2018 TIMEOUT(1)
04-19-2012
