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Top Forums UNIX for Dummies Questions & Answers past login still exist in the system Post 32383 by LivinFree on Saturday 23rd of November 2002 12:29:47 PM
Old 11-23-2002
kill -9 sends signal 9 (SIGKILL) to the process you're pointing it at. This particular signal is untrappable by the process, and it is forced to terminate instantly.
On the other hand, if you did a kill -1 <pid>, it would think it was that the parent process had hung up or disconnected (going back to dumb terminals and/or dialing lines) - it's a SIGHUP signal.

There are other signals, and all others can be caught (and ignored or something other than a "kill" will happen - inetd, for instance), but most of the time, there's no reason to use kill -9.

For a list of signals, check out "man kill".
 
Test Your Knowledge in Computers #162
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Early versions of MINIX were created by Andrew S. Tanenbaum for commercial purposes.
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listusers(1)							   User Commands						      listusers(1)

NAME
listusers - list user login information SYNOPSIS
listusers [-g groups] [-l logins] DESCRIPTION
Executed without any options, this command lists all user logins sorted by login. The output shows the login ID and the account field value from the system's password database as specified by /etc/nsswitch.conf. OPTIONS
The following options are supported: -g groups Lists all user logins belonging to group, sorted by login. Multiple groups can be specified as a comma-separated list. -l logins Lists the user login or logins specified by logins, sorted by login. Multiple logins can be specified as a comma-separated list. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------------------------------------+ |ATTRIBUTE TYPE ATTRIBUTE VALUE | |Availability SUNWcsu | +-----------------------------------------------------------+ SEE ALSO
nsswitch.conf(4), attributes(5) NOTES
A user login is one that has a UID of 100 or greater. The -l and -g options can be combined. User logins will only be listed once, even if they belong to more than one of the selected groups. SunOS 5.11 18 Mar 1994 listusers(1)

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