Hi, I know that inode for each file is unique, but is it the for the directory? So far I found different directories has the same inode nubmer when you do ls -i, could some one explain why? Thanks a lot. (9 Replies)
Ok, so I just got charged with the task of deleting some 300 user folders in a FTP server to free up some space. I managed to grep and cut the list of user folders to delete into a list of one user folder per line.
Example:
bob00
jane01
sue03
In the home folder, there are folders a-z, and... (5 Replies)
Hi,
I have a directory with Multiple subdirectories and 1000s of pictures (jpg) in each directory. The problem is that each directory has a 001.jpg in them. I want to append a unique name (the directory_name)would be fine. and then move them to one main backup directory once they have been... (1 Reply)
hi
i have used comm -13 <(sort 1.txt) <(sort 2.txt) option to get the unique lines that are present in file 2 but not in file 1. but some how i am getting the entire file 2. i would expect few but not all uncommon lines fro my dat. is there anything wrong with the way i used the command?
my... (1 Reply)
Hello,
I`m a complete newbie to coding, please help with this problem.
I have multiple files in a directory, I have to loop through the contents of each file and extract number of unique isoforms in that file. Each file is tab delimited and only the line with the first parent (column 3)... (1 Reply)
In a incoming folder i have list of files like below,i want to pick the unique files to process the job. if same file contain more than one then it should pick latest date modified file to process.
drwxrwsrwx 2 n308799 infagrp 256 May 20 17:42 Final_Working
drwxrwsrwx 2... (1 Reply)
I am trying to add a unique identifier to two file extensions .bam and .vcf in a directory located at /home/cmccabe/Desktop/index/R_2016_09_21_14_01_15_user_S5-00580-9-Medexome.
The identifier is in $2 of the input file. What the code below is attempting to do is strip off the last portion... (21 Replies)
Given a directory containing say a few thousand files,
please output a list of all the names of the files in the directory that are exactly the same, i.e. have the same contents.
func(a_directory_name) output -> {“matches”: , ... ]}
e.g. func(“/home/my/files”) where the directory... (7 Replies)
I have a directory of files, I can show the number of lines in each file and order them from lowest to highest with:
wc -l *|sort
15263 Image.txt
16401 reference.txt
40459 richtexteditor.txt
How can I also print the number of unique lines in each file?
15263 1401 Image.txt
16401... (15 Replies)
Discussion started by: spacegoose
15 Replies
LEARN ABOUT MOJAVE
cksum
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)