02-02-2008
little help needed..
hi everyone i'm a noob trying to learn unix language.. but seems like i got no leads on how to start..
i'm playing with the 'ps' command.. i'm trying to show the pid, ppid, username, command, cpu utilization (in desc order), process start time and process status.. all in a command.. am i able to do that..? cos i've been trying for days and cant really 'read' the manual..
any help or advice would be appreciated.. thanks..
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UUIDD(8) System Administration UUIDD(8)
NAME
uuidd - UUID generation daemon
SYNOPSIS
uuidd [options]
DESCRIPTION
The uuidd daemon is used by the UUID library to generate universally unique identifiers (UUIDs), especially time-based UUIDs, in a secure
and guaranteed-unique fashion, even in the face of large numbers of threads running on different CPUs trying to grab UUIDs.
OPTIONS
-d, --debug
Run uuidd in debugging mode. This prevents uuidd from running as a daemon.
-h, --help
Display help screen and exit.
-k, --kill
If currently a uuidd daemon is running, kill it.
-n, --uuids number
When issuing a test request to a running uuidd, request a bulk response of number UUIDs.
-p, --pid path
Specify the pathname where the pid file should be written. By default, the pid file is written to /var/uuidd/uuidd.pid.
-P, --no-pid
Do not create pid file.
-F, --no-fork
Do not daemonize using double-fork.
-S, --socket-activation
Do not create the socket and instead expect it to be provided by the calling process. Implies --no-fork and --no-pid. As of this
writing, this option is supposed to be used only with systemd. This option must be enabled with a configure option.
-q, --quiet
Suppress some failure messages.
-r, --random
Test uuidd by trying to connect to a running uuidd daemon and request it to return a random-based UUID.
-s, --socket path
Specify the pathname used for the unix-domain socket used by uuidd. By default, the pathname used is /var/uuidd/request. This is
primarily for debugging purposes, since the pathname is hard-coded in the libuuid library.
-T, --timeout timeout
Specify a timeout for uuidd. If specified, then uuidd will exit after timeout seconds of inactivity.
-t, --time
Test uuidd by trying to connect to a running uuidd daemon and request it to return a time-based UUID.
-V, --version
Output version information and exit.
EXAMPLE
Start up a daemon, print 42 random keys, and then stop the daemon.
uuidd -p /tmp/uuidd.pid -s /tmp/uuidd.socket
uuidd -d -r -n 42 -s /tmp/uuidd.socket
uuidd -d -k -s /tmp/uuidd.socket
AUTHOR
The uuidd daemon was written by Theodore Ts'o <tytso@mit.edu>.
AVAILABILITY
The uuidd daemon is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.
SEE ALSO
uuid(3), uuidgen(1)
util-linux June 2011 UUIDD(8)