07-10-2014
Quote:
Originally Posted by
bobochacha29
I can get the ppid of the processs, but how to get the detail informations from that ppid. For example, I know process's user is "guest", process's PPID is 1000000, but there are both 2 people using user "guest" from 2 diferent IP. So how to know which people ( IP ) begin the process ??
With the PPID and the PID you can reconstruct "trees" of processes. Here is an example: a user types "ls" on the commandline. The following has happened:
The "login"-process has started a login-shell for that user. Because this shell is attached to a (maybe virtual) terminal you can distinguish separate sessions of the same user. They will differ in the terminal they use. This shell now starts another process, "ls".
Searching the process list for the user will give you some entries including the "ls" process. Read the PPID field and search the list again for a process having this process number in the PID field. This is the process which has started the "ls"-process - the shell it was started from. With the process information from this shell you find out which session of the user originated the process.
I hope this helps.
bakunin
This User Gave Thanks to bakunin For This Post:
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halt(8) System Manager's Manual halt(8)
NAME
halt - Stops the processor
SYNOPSIS
/usr/sbin/halt [-d] [-l] [-n] [-q] [-y]
DESCRIPTION
If other users are logged into the system, or if the system is operating at a multiuser run level, use the /usr/sbin/shutdown -h command to
halt the system. If only the root user is logged in, and you do not plan to restart the system immediately, use the halt command.
The halt command writes data to the disks and then stops the processor(s), but does not reboot the machine. You must be the root user to
run this command.
When the system displays the ....Halt completed.... message, you can turn off power to the machine.
If the command is invoked without the -l, -n, or -q flag, the halt program logs the shutdown using the syslogd command and places a record
of the shutdown in the login accounting file, /var/adm/wtmp. Using the -q and the -n flags imply the -l flag.
FLAGS
Generates a crash dump of the system before halting it. Can be used with any other flag. Does not log the halt using syslog Prevents the
sync before stopping, and does not log the halt using syslog Causes a quick halt, does not log the halt using syslog, and makes no attempt
to kill all processes Halts the system from a dial-up operation
EXAMPLES
To halt the system without logging the shutdown in the log file, enter: halt -l To halt the system quickly, enter: halt -q To halt the sys-
tem quickly, also leaving a crash dump for the savecore command, enter: halt -d -q To halt the system from a dial-up, enter: halt -y
FILES
Specifies the command path Specifies the syslog daemon Specifies the login accounting file
RELATED INFORMATION
Commands: fasthalt(8), reboot(8), savecore(8), shutdown(8), syslogd(8)
Functions: reboot(2), sync(2), syslog(3) delim off
halt(8)