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Top Forums UNIX for Dummies Questions & Answers Subtracting an Integer from a Variable Post 302203988 by The Observer on Tuesday 10th of June 2008 10:24:33 AM
Old 06-10-2008
Subtracting an Integer from a Variable

Hello,

I am in following situation.-

COUNT=`ls -l | wc -l`
echo $COUNT
---> 26
NO_OF_FILES=$COUNT-1
echo $NO_OF_FILES
---> 26-1

Here, I want the output to be 25. How could I do this. It seems simple, but I am not getting it. Please help me.
 

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topsyscall(1m)							   USER COMMANDS						    topsyscall(1m)

NAME
topsyscall - top syscalls by syscall name. Uses DTrace. SYNOPSIS
topsyscall [-Cs] [interval [count]] DESCRIPTION
This program continually prints a report of the top system calls, and refreshes the display every 1 second or as specified at the command line. Since this uses DTrace, only users with root privileges can run this command. OPTIONS
-C don't clear the screen -s print per second values EXAMPLES
Default output, 1 second updates, # topsyscall Print every 5 seconds, # topsyscall 5 Print a scrolling output, # topsyscall -C FIELDS
load avg load averages, see uptime(1) syscalls total syscalls in this interval syscalls/s syscalls per second SYSCALL system call name COUNT total syscalls in this interval COUNT/s syscalls per second DOCUMENTATION
See the DTraceToolkit for further documentation under the Docs directory. The DTraceToolkit docs may include full worked examples with ver- bose descriptions explaining the output. EXIT
topsyscall will run until Ctrl-C is hit, or the specified interval is reached. AUTHOR
Brendan Gregg [Sydney, Australia] SEE ALSO
dtrace(1M), prstat(1M) version 0.90 Jun 13, 2005 topsyscall(1m)
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