July 2005
Intermediate to advanced
944 pages
158h 24m
English
book
Linux in a Nutshell, Fifth Edition
by Ellen Siever, Aaron Weber, Stephen Figgins, Robert Love, Arnold Robbins
Content preview from Linux in a Nutshell, Fifth Edition
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
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Chapter 3: Linux Commands
This is the Title of the Book, eMatter Edition
Copyright © 2006 O’Reilly & Associates, Inc. All rights reserved.
Resources
The following resources can be specified in format strings:
c Number of involuntary context switches because of time slice
expiring.
C Name and arguments of command being timed.
D Average size of unshared data area, in kilobytes.
e Elapsed real time, in seconds.
E Elapsed real time as hours:minutes:seconds.
F Number of major (I/O-requiring) page faults.
I Number of filesystem inputs.
k Number of signals delivered to the process.
K Average total (data+stack+text) memory use, in kilobytes.
M Maximum resident set size, in kilobytes.
O Number of filesystem outputs.
p Average unshared stack size, in kilobytes.
P Percent of CPU used.
r Number of socket messages received.
R Number of minor (recoverable) page faults.
s Number of socket messages sent.
S Total CPU seconds used by the system on behalf of the
process.
t Average resident set size, in kilobytes.
U Total CPU seconds used directly by the process.
w Number of voluntary context switches.
W Number of times the process was swapped out of main
memory.
x Exit status of the command.
X Average shared text size, in kilobytes.
Z System page size, in bytes.
Example
Time the execution of the command ls -l and display the user time,
system time, and exit status of the command:
/usr/bin/time -f "\t%U user,\t%S system,\t%x status" ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.