From the man page of prstat:
The interval and the count is at the end of the command. It means that prstat has to be run at intervals of 'interval' seconds and 'count' number of times. So prstat 1 1 runs the command at one second intervals and runs it just once.
Im running a solaris 9 system and keep getting this message: Request to LXKF894CB (unknown printer) from zion.
This happen because there was a mis configured printer and a job was submitted to it. I fix the printer issue but this message keeps repeating and the PID keeps going up. How can i... (5 Replies)
hi,
Can any plz tell what is the command for stopping a processor? suppose a system is accessing 10 processors and we want to stop the 3rd & 6th processor then whats the command in Unix?
thank u (2 Replies)
Hi
I want to stop a process using a shell script. how do i do that?
ie, to simulate ps -ef|grep Process name
get the process id and kill -9 process id
plz help... (4 Replies)
This is simple for an experianced scripter but that is not what I am :)
if ; then
echo -==Test Passed $3 $4==- >> $1$2
nohup $6$7 & >> $1$2
else
echo -==$8==- >> $1$9
echo -==$8==- >> $1$2
fi
In the else step I also want to stop the script from moving on. ... (15 Replies)
Hi,
on server Red Hat Enterprise Linux AS release 3, I am getting the mail "you have mail" can any body suggest how to stop this? mail are getting generated in below path.
/var/spool/postfix/maildrop, due to which heavy file are getting generated.
though sendmail service is stopped.
... (0 Replies)
Hi,
I have scheduled one job in crontab. I want to stop the job automatically after some time of its execution without killing it.
Could i archive the above? (8 Replies)
Discussion started by: mehulleo
8 Replies
LEARN ABOUT DEBIAN
flock
FLOCK(1) User Commands FLOCK(1)NAME
flock - manage locks from shell scripts
SYNOPSIS
flock [-sxon] [-w timeout] lockfile [-c] command...
flock [-sxon] [-w timeout] lockdir [-c] command...
flock [-sxun] [-w timeout] fd
DESCRIPTION
This utility manages flock(2) locks from within shell scripts or the command line.
The first and second forms wraps the lock around the executing a command, in a manner similar to su(1) or newgrp(1). It locks a specified
file or directory, which is created (assuming appropriate permissions), if it does not already exist.
The third form is convenient inside shell scripts, and is usually used the following manner:
(
flock -n 9 || exit 1
# ... commands executed under lock ...
) 9>/var/lock/mylockfile
The mode used to open the file doesn't matter to flock; using > or >> allows the lockfile to be created if it does not already exist, how-
ever, write permission is required; using < requires that the file already exists but only read permission is required.
By default, if the lock cannot be immediately acquired, flock waits until the lock is available.
OPTIONS -s, --shared
Obtain a shared lock, sometimes called a read lock.
-x, -e, --exclusive
Obtain an exclusive lock, sometimes called a write lock. This is the default.
-u, --unlock
Drop a lock. This is usually not required, since a lock is automatically dropped when the file is closed. However, it may be
required in special cases, for example if the enclosed command group may have forked a background process which should not be hold-
ing the lock.
-n, --nb, --nonblock
Fail (with an exit code of 1) rather than wait if the lock cannot be immediately acquired.
-w, --wait, --timeout seconds
Fail (with an exit code of 1) if the lock cannot be acquired within seconds seconds. Decimal fractional values are allowed.
-o, --close
Close the file descriptor on which the lock is held before executing command. This is useful if command spawns a child process
which should not be holding the lock.
-c, --command command
Pass a single command to the shell with -c.
-h, --help
Print a help message.
AUTHOR
Written by H. Peter Anvin <hpa@zytor.com>.
COPYRIGHT
Copyright (C) 2003-2006 H. Peter Anvin.
This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
LAR PURPOSE.
SEE ALSO flock(2)AVAILABILITY
The flock command is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.
util-linux February 2006 FLOCK(1)