Maybe a security problem involving Linux hosts Post: 302980283

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Special Forums Cybersecurity Maybe a security problem involving Linux hosts Post 302980283 by Corona688 on Thursday 25th of August 2016 05:13:55 PM

08-25-2016

Registered User

Network intrusion happens often enough that they almost certainly weren't after you personally. It's like email spam -- attackers probe thousands of systems hoping to find one easy catch. Did you ask your ISP how many other modems were under attack? For an ISP to even admit that their modems are being attacked hints at a large problem.

When did you lose your LastPass passwords? LastPass has cleared and deactivated accounts by the million to deal with their own intrusion attempts. Once again, probably not personal.

Had HexChat needed to install any updates after not using it for months? Had you installed it from scratch after the big computer-bleach? Once again, probably not personal, just a default setting.

In short, I don't think you're crazy -- I think you have an unclear idea how computer software and computer networking works. These events have very little in common, unclear motivation (why would a hacker want to rename your IRC networks?), and very different methods(random issues in your local computer, vs malicious hacking of a well-known password service, vs intrusion on your ISP's WAN, etc...), too many for me to assume they're all from the same person or have you in particular in mind. Reformatting your computer because someone attacked your modem is akin to burning down your house because someone looked in your window, anyway.

Last edited by Corona688; 08-25-2016 at 06:25 PM..

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userdbck

userdbck(1M)															      userdbck(1M)

NAME

       userdbck - verify or fix information in the user database, /var/adm/userdb

SYNOPSIS

       [file]

DESCRIPTION

       verifies the information in the user database reports inconsistencies, and fixes problems.

       If no options and no arguments are specified, reports all data corruption problems in all files in

       If the option is also specified, each reported problem is repaired.

       If a file argument (hex 00-ff) is specified, only that file in the directory is verified.

   Options
       The following options are recognized:

	      Verify attributes.  Information in
		   is  used  to report any attribute that is not valid, not allowed in the user database, has an invalid value, or is allowed only
		   for a local user and the user is not in

	      Normally when the user database is disabled (see
		   userdb(4)), immediately exits without verifying or repairing the database.  The option overrides this and forces to	verify	or
		   repair the database.

	      Verify user names.
		   User names found in the database are reported if they do not exist in any of the repositories defined in This option could take
		   a long time on a system with many users.

	      Repair all data corruption problems that are found.
		   If this option is not specified, problems are reported but not repaired.

   Notes
       Only users who have read and write access to can run

RETURN VALUE

       exits with one of the following values:

       success: no inconsistencies were found
       inconsistencies were found and fixed
       invalid usage
       database is disabled; see
	  userdb(4)
       inconsistencies were found but not fixed,
	  because the option was not specified
       a problem was found that could not be fixed

EXAMPLES

       In the following example, all problems in the user database are reported but not repaired.

       In the following example, all problems in file are reported and repaired.

FILES

       user database
       security defaults configuration file
       security attributes description file

SEE ALSO

       userdbget(1M), userdbset(1M), userdb_read(3), security(4), userdb(4).

																      userdbck(1M)