12-02-2013
Ask yourself a question, why should i do it?
9 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
I have been working with UNIX (HP-UX) now for a couple of years. Have become quite capable in shell scripting and general UNIX use. The local university offers a certification course in UNIX administration which I am considering taking. However, the certification is geared toward UNIX in general... (13 Replies)
Discussion started by: google
13 Replies
2. HP-UX
Hi,
I would like to know some details about Hp-UX system administration exam ( HP0-002). I want to know
1. What is the passing percentage
2. How touch is the exam. I am reading Rehman's book thru and thru. I need to know if any other studies are required. I have some 4 years of Unix hands... (3 Replies)
Discussion started by: vikas_sri
3 Replies
3. HP-UX
Hi,
I would like to know some details about Hp-UX system administration exam ( HP0-002). I want to know
1. What is the passing percentage
2. How touch is the exam. I am reading Rehman's book thru and thru. I need to know if any other studies are required. I have some 4 years of Unix hands... (1 Reply)
Discussion started by: vikas_sri
1 Replies
4. UNIX for Dummies Questions & Answers
Dear all,
I plan to take HP-UX cert. EXAM.
But, I cannot find hp-ux system & network administration II.pdf file
Do you know where can I download??
Do you have? can you send to me?
Thank you! (2 Replies)
Discussion started by: hkpcman
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5. Solaris
I'm planning to take System Administration certification in SUN Solaris. Can some one suggest me if there are any links are URLs to find sample question papers.
Pharos (2 Replies)
Discussion started by: pharos467
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6. UNIX for Dummies Questions & Answers
I'm a newbie so I'm not sure if I'm posting this in the right section... if I didn't, please forgive me :)
I've been looking all over the web for information on system administration. I'd like to become a Unix System Administrator but I want to find some more info about the job. Can someone please... (54 Replies)
Discussion started by: hpicracing
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7. Solaris
Sorry I'm kind of desperate here :wall:, there's a security audit coming next week :( and I can't seem to find solutions for the questions below :confused:.
1) I need to limit usage on account during non-working hours.
There's no /etc/security/time.conf file in my system should I create it?
... (0 Replies)
Discussion started by: ShouTenraku
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8. UNIX for Advanced & Expert Users
Sorry for making this post so generic.
I'm trying to see if there are tools that exist that look at local network/system configurations and find problems... for example:
- NTP server configured that cannot be reached (can cause the system to drift because nobody is alerted to the fact that the... (0 Replies)
Discussion started by: jjinno
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9. What is on Your Mind?
In the fall I am taking courses in System Admin and Networking Admin, along with Cisco classes. Sometime next year I hope to get Red Hat and CCNA certifications, then try to get some experience and a job.
I am wondering what I can focus on in the meantime (and in my spare time) that will... (1 Reply)
Discussion started by: ScottLew
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LEARN ABOUT XFREE86
posix_madvise
POSIX_MADVISE(3) Linux Programmer's Manual POSIX_MADVISE(3)
NAME
posix_madvise - give advice about patterns of memory usage
SYNOPSIS
#include <sys/mman.h>
int posix_madvise(void *addr, size_t len, int advice);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
posix_madvise():
_POSIX_C_SOURCE >= 200112L
DESCRIPTION
The posix_madvise() function allows an application to advise the system about its expected patterns of usage of memory in the address range
starting at addr and continuing for len bytes. The system is free to use this advice in order to improve the performance of memory
accesses (or to ignore the advice altogether), but calling posix_madvise() shall not affect the semantics of access to memory in the speci-
fied range.
The advice argument is one of the following:
POSIX_MADV_NORMAL
The application has no special advice regarding its memory usage patterns for the specified address range. This is the default
behavior.
POSIX_MADV_SEQUENTIAL
The application expects to access the specified address range sequentially, running from lower addresses to higher addresses.
Hence, pages in this region can be aggressively read ahead, and may be freed soon after they are accessed.
POSIX_MADV_RANDOM
The application expects to access the specified address range randomly. Thus, read ahead may be less useful than normally.
POSIX_MADV_WILLNEED
The application expects to access the specified address range in the near future. Thus, read ahead may be beneficial.
POSIX_MADV_DONTNEED
The application expects that it will not access the specified address range in the near future.
RETURN VALUE
On success, posix_madvise() returns 0. On failure, it returns a positive error number.
ERRORS
EINVAL addr is not a multiple of the system page size or len is negative.
EINVAL advice is invalid.
ENOMEM Addresses in the specified range are partially or completely outside the caller's address space.
VERSIONS
Support for posix_madvise() first appeared in glibc version 2.2.
CONFORMING TO
POSIX.1-2001.
NOTES
POSIX.1 permits an implementation to generate an error if len is 0. On Linux, specifying len as 0 is permitted (as a successful no-op).
In glibc, this function is implemented using madvise(2). However, since glibc 2.6, POSIX_MADV_DONTNEED is treated as a no-op, because the
corresponding madvise(2) value, MADV_DONTNEED, has destructive semantics.
SEE ALSO
madvise(2), posix_fadvise(2)
COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the
latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.
Linux 2017-09-15 POSIX_MADVISE(3)