ok, i know the syntax that goes along with the Shutdown command... but my box never wants to ... well... shutdown.. it only halts, kills all the process's, stalls the comp to a complete stop, but does actually kill the monitor and/or shut off the physical computer. it will reboot properly though,... (3 Replies)
I have heard for a long time that in maybe 2039 Unix will no longer be useable due the length of the date value. Anyone know anything about this? (4 Replies)
Hi guys,
I'm new to unix but loving it!! BUT this is driving me nuts as i can't work out the best way to do it.
I have a while true loop that i use to monitor something. For my own reasons in ths script i have disabled the CTRL C using the trap command. But i want to put in a option to exit... (5 Replies)
I am running an Ubuntu Gutsy laptop with Advanced Compiz fusion options enabled. I am using xdotool to simulate keyboard input in order to rotate through multiple desktops.
I am looking for a way to kill a while true loop when the Enter key (or Control+C if it is easier) is pushed when the... (2 Replies)
Hallo everybody
I am having a shell script called auto_run.sh in that only the first line works.
the second line which has sed command is working only at the # prompt. not within the shell script. What could be the reason.
*... sed 's/ //g' KTI >abc works in another shell script without the... (6 Replies)
hi,
i am new in bash scripting.
i am trying to write a Bash script to monitor how many process are running in my Redhat6 Linux machine.
example :
let say there must be always 5 process from the same kind that must run and if one off them fails down the script must wake up another process... (2 Replies)
Hi Team,
I need to know why ppl use If true loop instead of just writing down the sequence of code lines.
1:
echo "Line1"
if true; then
echo "Line2"
fi
echo "Line3"
2:
echo "Line1"
echo "Line2"
echo "Line3"
Could you explain what does the if true loop make difference in 1st compare... (3 Replies)
Hello Team,
In my shell script, it stopped without killing it.
Could you please help why ?
Below is the code :
get_dpi44_currentFiles()
{
truncate --size 0 $dpi_44_fixed_currentFileList
if ssh $dpi_srvr_44 -p 2222 "ls $dpi_44_sourceFilesDir/fixed | grep '\.tgz$'" >... (5 Replies)
Discussion started by: sadique.manzar
5 Replies
LEARN ABOUT OSX
while
while(n) Tcl Built-In Commands while(n)
__________________________________________________________________________________________________________________________________________________NAME
while - Execute script repeatedly as long as a condition is met
SYNOPSIS
while test body
_________________________________________________________________DESCRIPTION
The while command evaluates test as an expression (in the same way that expr evaluates its argument). The value of the expression must a
proper boolean value; if it is a true value then body is executed by passing it to the Tcl interpreter. Once body has been executed then
test is evaluated again, and the process repeats until eventually test evaluates to a false boolean value. Continue commands may be exe-
cuted inside body to terminate the current iteration of the loop, and break commands may be executed inside body to cause immediate termi-
nation of the while command. The while command always returns an empty string.
Note: test should almost always be enclosed in braces. If not, variable substitutions will be made before the while command starts execut-
ing, which means that variable changes made by the loop body will not be considered in the expression. This is likely to result in an
infinite loop. If test is enclosed in braces, variable substitutions are delayed until the expression is evaluated (before each loop iter-
ation), so changes in the variables will be visible. For an example, try the following script with and without the braces around $x<10:
set x 0
while {$x<10} {
puts "x is $x"
incr x
}
EXAMPLE
Read lines from a channel until we get to the end of the stream, and print them out with a line-number prepended:
set lineCount 0
while {[gets $chan line] >= 0} {
puts "[incr lineCount]: $line"
}
SEE ALSO
break(n), continue(n), for(n), foreach(n)
KEYWORDS
boolean value, loop, test, while
Tcl while(n)