07-24-2007
fgrep fails...!?
Hi all,
I need to transport a number of files from one server to other. I like to ensure the integrity using file checksum values.
The action plan is,
1. create the list of checksum values for all the files using cksum command in source server.
2. Transfer all the files including the file genered in step 1 to destination server.
3. Take the checksum of each file and compared with the file generated in step 1 using fgrep command.
I have a bash shell script to verify this.
The issue for me, in step 3 when i compared, the fgrep didn't find out even the checksum values changes.
My script is as below:
clear
cksum *.* > tmp.txt
while read N
do
fgrep -c $'(echo $N)' tmp.txt
done<x.txt
Remarks: tmp.txt - the file which generated in the destination server after copied. x.txt - the file which generated in source server (step 1) and transfered along with the files.
Please help me in this regard. Also let me know, any other ideas.
regards,
Sethu.
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
How can I do an and condition with fgrep.
I want to do:
ps -ef | fgrep -f searchvalues > tempmail.file
mailx -s "Email Subject" email@domain.com < tempmail.file
The search values file contains:
opt/bea.*java.*80
mysqld
What I want is to find things that contain:
mysqld OR... (7 Replies)
Discussion started by: jimmy
7 Replies
2. Shell Programming and Scripting
Im haveing a problem with a script that i am currently writing. I am new to scripting and dont know it all that well. I cant use perl so please dont post perl scripts.
The problem is when i try and asign the result of the fgrep to qdetail. It does not seem to like that assignment. any ideas... (2 Replies)
Discussion started by: intergltc
2 Replies
3. UNIX for Advanced & Expert Users
Hi Guys,
Can anyone explain why I'm getting error below? when I execute in other server there is no error, what could be the reason.
$ fgrep -f timecell.txt ldap_prev.dat
wordlist too large
$ wc -l timecell.txt ldap_prev.dat
372461 timecell.txt
3722878 ldap_prev.dat
Thanks in... (2 Replies)
Discussion started by: krishna
2 Replies
4. UNIX for Dummies Questions & Answers
Hi,
I need fgrep to search all files in the subdirectories in /var/spool/postfix/defer/...
How can I issue such a command? (3 Replies)
Discussion started by: mojoman
3 Replies
5. Shell Programming and Scripting
Hi,
I know that I can grep desired data to a file but is there a way to add an additional field of data to the output in addition to what is found. I want to add a login id to the data that is found in the grep. Is this even possible? Thanks for your help.
Toni (14 Replies)
Discussion started by: ski
14 Replies
6. Shell Programming and Scripting
How can we use fgrep command to search pattern on perticular field on a file.
eg : I have a parren file having format
cat patternfile
SPA16S199982
SPA5S26330
I want to seach these pattern on FIRST field of File2(since other field has
same data) and that too maching entirely.
... (10 Replies)
Discussion started by: morbid_angel
10 Replies
7. Shell Programming and Scripting
Hi All,
I have 2 files new.txt and old.txt
cat new.txt
sku1|v1|v2|v3
sku2|v11|v22|v33
sku3|v11|v22|v33
cat old.txt
sku1|vx1|vx2|vx3
sku2|vx11|vx22|vx33
sku3|v11|v22|v33
The key column in both files are first column itself.
I want to get records in... (6 Replies)
Discussion started by: morbid_angel
6 Replies
8. Shell Programming and Scripting
Hi ,
Please help me resolve the below issue.
I need to combine the below two command into one.
grep 'ImanItemP' import.report| tr -s ' ' | cut -f2 -d ' ' > tmp.txt
fgrep -v -f tmp.txt input.txt > reuired file.txt
Thanks
Ramesh (4 Replies)
Discussion started by: ramesh12621
4 Replies
9. Shell Programming and Scripting
Is there any equivalent of the below requirement in perl
fgrep -f file1 file2 > file3 (2 Replies)
Discussion started by: aravindj80
2 Replies
10. UNIX for Dummies Questions & Answers
Using the fgrep command with the -v option.
I have two files:
file1:
dog 1
cat 3
bird 5
fish 7file2:
dog
catUsing fgrep -v file2 file1 According to the fgrep man page, the output should be bird5
fish 7 but I can't seem to get it to work. Any help would be appreciated. (2 Replies)
Discussion started by: jimmyf
2 Replies
cksum(n) Cyclic Redundancy Checks cksum(n)
__________________________________________________________________________________________________________________________________________________
NAME
cksum - Calculate a cksum(1) compatible checksum
SYNOPSIS
package require Tcl 8.2
package require cksum ?1.1.3?
::crc::cksum ?-format format? ?-chunksize size? [ -channel chan | -filename file | string ]
::crc::CksumInit
::crc::CksumUpdate token data
::crc::CksumFinal token
_________________________________________________________________
DESCRIPTION
This package provides a Tcl implementation of the cksum(1) algorithm based upon information provided at in the GNU implementation of this
program as part of the GNU Textutils 2.0 package.
COMMANDS
::crc::cksum ?-format format? ?-chunksize size? [ -channel chan | -filename file | string ]
The command takes string data or a channel or file name and returns a checksum value calculated using the cksum(1) algorithm. The
result is formatted using the format(n) specifier provided or as an unsigned integer (%u) by default.
OPTIONS
-channel name
Return a checksum for the data read from a channel. The command will read data from the channel until the eof is true. If you need
to be able to process events during this calculation see the PROGRAMMING INTERFACE section
-filename name
This is a convenience option that opens the specified file, sets the encoding to binary and then acts as if the -channel option had
been used. The file is closed on completion.
-format string
Return the checksum using an alternative format template.
PROGRAMMING INTERFACE
The cksum package implements the checksum using a context variable to which additional data can be added at any time. This is expecially
useful in an event based environment such as a Tk application or a web server package. Data to be checksummed may be handled incrementally
during a fileevent handler in discrete chunks. This can improve the interactive nature of a GUI application and can help to avoid excessive
memory consumption.
::crc::CksumInit
Begins a new cksum context. Returns a token ID that must be used for the remaining functions. An optional seed may be specified if
required.
::crc::CksumUpdate token data
Add data to the checksum identified by token. Calling CksumUpdate $token "abcd" is equivalent to calling CksumUpdate $token "ab"
followed by CksumUpdate $token "cb". See EXAMPLES.
::crc::CksumFinal token
Returns the checksum value and releases any resources held by this token. Once this command completes the token will be invalid. The
result is a 32 bit integer value.
EXAMPLES
% crc::cksum "Hello, World!"
2609532967
% crc::cksum -format 0x%X "Hello, World!"
0x9B8A5027
% crc::cksum -file cksum.tcl
1828321145
% set tok [crc::CksumInit]
% crc::CksumUpdate $tok "Hello, "
% crc::CksumUpdate $tok "World!"
% crc::CksumFinal $tok
2609532967
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
crc32(n), sum(n)
KEYWORDS
checksum, cksum, crc, crc32, cyclic redundancy check, data integrity, security
CATEGORY
Hashes, checksums, and encryption
COPYRIGHT
Copyright (c) 2002, Pat Thoyts
crc 1.1.3 cksum(n)