Hey guys,
I'm writing a monitoring program that reads the pattern and the max and min number of instances of a process and then proceeds to parse the currently running processes for the pattern.
I just want to know how I should go about this. I'll give you an idea of the flow of the program:... (7 Replies)
I have a script that runs continuously and will deliver a file to multiple servers via scp. On occasions one of the scp's will hang and as a result not complete in sending the remaining files and not loop around again.
If I run the scp commands with a & they'll complete, but I want to make sure... (2 Replies)
Hi,
I need to establish a procedure that will start an application in background each time my remote Solaris server is (re)started. This would be a kind of daemon. I am no sysadmin expert, so I am looking for pointers.
How should I proceed? What are the main steps?
Thanks,
JVerstry (9 Replies)
I have a script something like this:
#!/usr/bin/ksh
CLASSPATH=/apps/opt/db2udb/admin/db2bdt/sqllib/java/db2java.zip:/apps/opt/db2udb/admin/db2bdt/sqllib/java/db2jcc.jar:/apps/opt/db2udb/admin/db2bdt/sqllib/function:$CLASSPATH
export CLASSPATH
... (7 Replies)
Hi can anybody help me regarding this..
i want know the output of ps -ef with explanation.
how can we know the running processess.
this is the output of ps -elf
F S UID PID PPID C PRI NI ADDR SZ WCHAN STIME TTY TIME CMD
19 T root 0 0 0 0 SY ... (1 Reply)
so i've been using this a lot in a lot of my scripts:
( columnA & columnAPID=$! & columnB & columnBPID=$! & columnC & columnCPID=$! &) &
wait ${columnAPID}
wait ${columnBPID}
wait ${columnCPID}
It seems to work as ive seen it dramatically reduce run time of my scripts.
however, i'm... (5 Replies)
Hi All
I have been asked to write scripts within our monitoring tool for a vast requirement set.
One of the requirements is below:
• Lowest, Highest & Average response times of the Documentum process threads serving client requests
Essentially they want a view where we can see the... (4 Replies)
Discussion started by: simpsa27
4 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)