11-02-2012
SPAWN Multiple Processes in Unix
Hi,
I have three files in my IN directory.Each file should be copied 25 times using for loop.Each file processing should run in parallel?How to spawn multiple processes in unix?Any help would be appreciated.
Thanks,
Liyakath
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LEARN ABOUT LINUX
archive
ARCHIVE(8) System Manager's Manual ARCHIVE(8)
NAME
archive - Usenet article archiver
SYNOPSIS
archive [ -a archive ] [ -f ] [ -i index ] [ -m ] [ -r ] [ input ]
DESCRIPTION
Archive makes copies of files specified on its standard input. It is normally run either as a channel feed under innd(8), or by a script
before expire(8) is run.
Archive reads the named input file, or standard input if no file is given. The input is taken as a set of lines. Blank lines and lines
starting with a number sign (``#'') are ignored. All other lines should specify the name of a file to archive. If a filename is not an
absolute pathname, it is taken to be relative to /var/spool/news.
Files are copied to a directory within the archive directory, /var/spool/news/news.archive. The default is to create a hierarchy that mim-
ics the input files; intermediate directories will be created as needed. For example, the input file comp/sources/unix/2211 (article 2211
in the newsgroup comp.sources.unix) will be copied to /var/spool/news/news.archive/comp/sources/unix/2211.
OPTIONS
-a archive
If the ``-a'' flag is used then its argument specifies the directory to archive in instead of the default.
-f If the ``-f'' flag is used, then all directory names will be flattened out, replacing the slashes with periods. In this case, the
file would be copied to /var/spool/news/news.archive/comp.sources.unix/2211.
-i If the ``-i'' flag is used, then archive will append one line to the specified index file for each article that it copies. This
line will contain the destination name and the Message-ID and Subject headers.
-m Files are copied by making a link. If that fails a new file is created. If the ``-m'' flag is used, then the file will be copied
to the destination, and the input file will be replaced with a symbolic link pointing to the new file.
-r By default, archive sets its standard error to /var/log/news/errlog. To suppress this redirection, use the ``-r'' flag.
EXIT STATUS
If the input is exhausted, archive will exit with a zero status. If an I/O error occures, it will try to spool its input, copying it to a
file. If there was no input filename, the standard input will be copied to /var/spool/news/out.going/archive and the program will exit.
If an input filename was given, a temporary file named input.bch (if input is an absolute pathname) or /var/spool/news/out.going/input.bch
(if the filename does not begin with a slash) is created. Once the input is copied, archive will try to rename this temporary file to be
the name of the input file, and then exit.
EXAMPLES
A typical newsfeeds(5) entry to archive most source newsgroups is as follows:
source-archive
:!*,*sources*,!*wanted*,!*.d
:Tc,Wn
:/usr/lib/news/bin/archive -f -i
/usr/spool/news/news.archive/INDEX
HISTORY
Written by Rich $alz <rsalz@uunet.uu.net> for InterNetNews. This is revision 1.14, dated 1996/10/29.
SEE ALSO
newsfeeds(5).
ARCHIVE(8)