hi,
i would like to study unix but i don't have the software for me to test the scripts that i read from the book and from the internet. I would like to ask anyones help to please tell me link wer i can download for free the unix system.
I would be glad to receive your replies.
thanks, (2 Replies)
So, I've been told and heard a million times that malloc and free are expensive calls to be avoided. So many times I avoid malloc by reusing already allocated memory blocks. Store them on free lists somewhere myself and don't call free when I know malloc will be called very shortly thereafter.
... (6 Replies)
hi. i configured a master and slave bind server on my vmware test network. i used nslookup to the slave name server to lookup a fake entry for network.com that the master dns set, however, the slave is resolving the real ip of www.network.com, instead of what the master dns server set. i checked... (2 Replies)
Good morning folks,
A good friend of mine has a network where every host has two paths to the file servers (two NICs & two networks for all hosts).
Normally speaking, one network will be used for regular application traffic - license servers, itunes library, collaboration tools - while the... (4 Replies)
Hello,
I currently use Solaris, and typically I use the
svcs -a | grep PROCESS
to see if it's online or Offline.
My questions is SVCS is in solaris but if I want to find out if a daemon or process is offline what other methods can I use?
ps -ef | grep PROCESS "what do I look for"
or... (1 Reply)
Here is another script I am trying to customize currently,
this script is used to send me disk space information, but at the moment I have to enter all the servers in manually SERVER= "xxx bbb ccc" ect..
how can I script it so that the servers are called off a txt file versus me entering all... (1 Reply)
Hi Everyone!
I'm new with UNIX,so, sorry if this question seems really dumb.:( Anyway, I'd just like if it's possible to automatically inform someone (via mail or pop-up box or something) that a file has been recently uploaded/received to the UNIX box? If it is, any advice on how to get that... (0 Replies)
Hi Everyone!
I'm new with UNIX,so, sorry if this question seems really dumb.:( Anyway, I'd just like if it's possible to automatically inform someone (via mail or pop-up box or something) that a file has been recently uploaded/received to the UNIX box? If it is, any advice on how to get that... (1 Reply)
Hello,
Good day. I would like to ask for your inputs on this scenario.
Currently, we have a NIS virtual machine with a Solaris 10 (32-bit) OS. And also we have another virtual machine with the same OS. And I am asked to set-up a secondary NIS on this another VM, bring down the primary NIS and... (0 Replies)
Greetings!
Will be firing up the good ole pizza box, soon. Does anyone know if Solaris 7 is still okay to use? Last time I attempted was 2006.
Thank you in advance,
ControlTomato (6 Replies)
Discussion started by: ControlTomato
6 Replies
LEARN ABOUT FREEBSD
sleep
SLEEP(1) BSD General Commands Manual SLEEP(1)NAME
sleep -- suspend execution for an interval of time
SYNOPSIS
sleep seconds
DESCRIPTION
The sleep command suspends execution for a minimum of seconds.
If the sleep command receives a signal, it takes the standard action. When the SIGINFO signal is received, the estimate of the amount of
seconds left to sleep is printed on the standard output.
IMPLEMENTATION NOTES
The SIGALRM signal is not handled specially by this implementation.
The sleep command allows and honors a non-integer number of seconds to sleep in any form acceptable by strtod(3). This is a non-portable
extension, and its use will nearly guarantee that a shell script will not execute properly on another system.
EXIT STATUS
The sleep utility exits 0 on success, and >0 if an error occurs.
EXAMPLES
To schedule the execution of a command for x number seconds later (with csh(1)):
(sleep 1800; sh command_file >& errors)&
This incantation would wait a half hour before running the script command_file. (See the at(1) utility.)
To reiteratively run a command (with the csh(1)):
while (1)
if (! -r zzz.rawdata) then
sleep 300
else
foreach i (`ls *.rawdata`)
sleep 70
awk -f collapse_data $i >> results
end
break
endif
end
The scenario for a script such as this might be: a program currently running is taking longer than expected to process a series of files, and
it would be nice to have another program start processing the files created by the first program as soon as it is finished (when zzz.rawdata
is created). The script checks every five minutes for the file zzz.rawdata, when the file is found, then another portion processing is done
courteously by sleeping for 70 seconds in between each awk job.
SEE ALSO nanosleep(2), sleep(3)STANDARDS
The sleep command is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible.
HISTORY
A sleep command appeared in Version 4 AT&T UNIX.
BSD April 18, 1994 BSD