You could also check the checksum of the files. This gives a unique number associated with the file and its contents. If the contents change but the size, permissions and mod time stay the same, the checksum will change.
Code:
# cd /tmp
# echo "this file is ok" > file
# cksum file
3592584977 16 file
# echo "the file is new" > file
# cksum file
3405287892 16 file
I am starting an audit of unix security within our company and am looking for any information that may assist me with this. I am looking for any tips or pointers that I should be aware of when looking at unix. I am very new to unix so any help will do. Maybe there is someone out the that has had... (3 Replies)
Hello,
What does the following mean in terms of file permissions.
-rw-rwSrw- 1 owner group 999 May 25 2004 file_name
What does the "S" stand for.
Thanks in advance for your input. :) (3 Replies)
I work for a big company and all the people within my unit share a common drive to save documents to. I am listed in the group(AMS group) that has access rights to folders within this drive. but i'm trying to restrict access to a confidential folder so that only I can access it.
when I set the... (0 Replies)
Hello,
If you are interested in security, check out this new directory of unix and linux related software tools.
Security - Links
If you have any of your favorite tools, feel free to add them to the directory. (0 Replies)
Introduction
I have seen some misinformation regarding Unix file permissions. I will try to set the record straight. Take a look at this example of some output from ls:
$ ls -ld /usr/bin /usr/bin/cat
drwxrwxr-x 3 root bin 8704 Sep 23 2004 /usr/bin
-r-xr-xr-x 1 bin bin ... (6 Replies)
Hi Team,
I want to set permissions to one folder in such a way that the user can write files or create folder inside that but should not able to delete it.
Basically reason behind this is i am using Pidgin Messenger. There is a directory of logs in which, when user chat its store his logs.... (2 Replies)
Discussion started by: paragnehete
2 Replies
LEARN ABOUT REDHAT
cksum
cksum(n) cksum cksum(n)
NAME
cksum - calculate a cksum(1) compatible checksum
SYNOPSIS
package require Tcl 8.2
package require cksum ?1.0?
::crc::cksum ?-format format? message
::crc::cksum ?-format format? -filename file
DESCRIPTION
This package provides a Tcl-only 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? message
::crc::cksum ?-format format? -filename file
The command takes string data or a 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 -filename name
Return a checksum for the file contents instead of for parameter data.
-format string
Return the checksum using an alternative format template.
EXAMPLES
% crc::cksum "Hello, World!"
2609532967
% crc::cksum -format 0x%X "Hello, World!"
0x9B8A5027
% crc::cksum -file cksum.tcl
1828321145
SEE ALSO
sum(n), crc32(n)
AUTHORS
Pat Thoyts
KEYWORDS
cksum, checksum, crc, crc32, cyclic redundancy check, data integrity, security
crc 1.0 cksum(n)