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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LEARN ABOUT OSX
topsyscall
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)