Hello,
I have this script running on cron every 20 minutes.
By 12pm daily, our system is expecting all input files to be uploaded by the script.
After this cutoff time, the script would still be running though, but i need some kind of alerts/logs to know which input files weren't received for... (1 Reply)
I have four years of shell scripting experience in AIX and HP-UX and have worked in perl scripts as well, the good part is i love scripting and so far i have been getting job offers as well.
The bad part is , shell scripting is all i know , so the kind of jobs i am getting is mostly production... (2 Replies)
Hi
How to call a shell scripting through a Perl scripting? Actually I need some value from Shell scripting and passes in the Perl scripting. So how can i do this? (2 Replies)
Hy i have some tasks to do in school but i'm having problems with it,so could you help me out? :)
first there is a task where i have to find a running program on the system and kill it, then repeat that every 5 minutes. The name of the process is given with an argument. I have done this so far,... (1 Reply)
Evening all,
Im trying to get a script that will:
Select the most 3 recent files in a specific directory
Run a command on them (like chmod)
Ask of you would like to continue
Copy the files to another directory
If a linux guru could help me out, it would be very much appreciated.
Thanks... (2 Replies)
Hi all, this is my first post, so please be gentle...
I have a situation wherby I need a script that traverses known paths. Check for the modified date (n days) and then deletes all subdirs.
I have come up with this hotch potch, but as far as I can tell it seems to work.
What I am wondering... (4 Replies)
sum(n) Cyclic Redundancy Checks sum(n)
__________________________________________________________________________________________________________________________________________________NAME
sum - Calculate a sum(1) compatible checksum
SYNOPSIS
package require Tcl 8.2
package require sum ?1.1.0?
::crc::sum ?-bsd | -sysv? ?-format fmt? ?-chunksize size? [ -filename file | -channel chan | string ]
_________________________________________________________________DESCRIPTION
This package provides a Tcl-only implementation of the sum(1) command which calculates a 16 bit checksum value from the input data. The
BSD sum algorithm is used by default but the SysV algorithm is also available.
COMMANDS
::crc::sum ?-bsd | -sysv? ?-format fmt? ?-chunksize size? [ -filename file | -channel chan | string ]
The command takes string data or a file name or a channel and returns a checksum value calculated using the sum(1) algorithm. The
result is formatted using the format(n) specifier provided or as an unsigned integer (%u) by default.
OPTIONS -sysv The SysV algorithm is fairly naive. The byte values are summed and any overflow is discarded. The lowest 16 bits are returned as the
checksum. Input with the same content but different ordering will give the same result.
-bsd This algorithm is similar to the SysV version but includes a bit rotation step which provides a dependency on the order of the data
values.
-filename name
Return a checksum for the file contents instead of for parameter data.
-channel chan
Return a checksum for the contents of the specified channel. The channel must be open for reading and should be configured for
binary translation. The channel will no be closed on completion.
-chunksize size
Set the block size used when reading data from either files or channels. This value defaults to 4096.
-format string
Return the checksum using an alternative format template.
EXAMPLES
% crc::sum "Hello, World!"
37287
% crc::sum -format 0x%X "Hello, World!"
0x91A7
% crc::sum -file sum.tcl
13392
AUTHORS
Pat Thoyts
BUGS, IDEAS, FEEDBACK
This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category crc of
the Tcllib SF Trackers [http://sourceforge.net/tracker/?group_id=12883]. Please also report any ideas for enhancements you may have for
either package and/or documentation.
SEE ALSO
cksum(n), crc32(n), sum(1)KEYWORDS
checksum, cksum, crc, crc32, cyclic redundancy check, data integrity, security, sum
CATEGORY
Hashes, checksums, and encryption
COPYRIGHT
Copyright (c) 2002, Pat Thoyts <patthoyts@users.sourceforge.net>
crc 1.1.0 sum(n)