Okee problems...!!
What is happening: Unix server with some programms, workstations are windows 2000, the workstations work good but when you start a programm on the Unix server the CPU of the workstations go to 100% usage resulting that the system gets very slow. The programm well its running so... (2 Replies)
I tried looking for the answer online and came up with only a few semi-answers as to why file and directory names are case sensitive in Unix. Right off the bat, I'll say this doesn't bother me. But I run into tons of Windows and OpenVMS admins in my day job who go batty when they have to deal... (3 Replies)
hi
i want run an unix application from a windows program/application.i am using SSH(command line version)to log on to a unix machine from windows. the application has to read a configuration file inorder to run. the configuration file .CFG is in bin in my home directory. but the application... (1 Reply)
Hi,
My local server is :/usr/abcd/
Remote server is :/Usr/host/test/
I want to send files from local unix directory(All files starting with O_999) to
remote host unix directory.
Can any body give me the Unix Shell script to do this.
One more doubt: Shall we need to change the file... (1 Reply)
Hi Experts,
I have a requirement where i need to setup a batch job which runs everymonth and move the pdf files from unix server to windows servers.
Could some body provide the inputs for this.
and also please provide the inputs on how to map the network dirve in the unix like that... (1 Reply)
Dear All,
Can someone help to command or program to transfer the file from windows to Unix server and from one unix server to another Unix server in secure way.
I would request no samba client. (4 Replies)
Discussion started by: yadavricky
4 Replies
8. Post Here to Contact Site Administrators and Moderators
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Discussion started by: Neo
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LEARN ABOUT LINUX
flock
FLOCK(1) H. Peter Anvin 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
# ... 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/.
flock utility 4 Feb 2006 FLOCK(1)