10-15-2002
Levenz is an excellent read...and if u really want to get a rounded story about the basis of unix and the evolution to Gnu and Linux, try reading any documents on Linus Torvalds...
10 More Discussions You Might Find Interesting
1. News, Links, Events and Announcements
Link describe the Step by step formation of Unix
http://perso.wanadoo.fr/levenez/unix/
Also:
- History
- Author of First Unix C Language
- Unix Family research Tree
- BSD and Sun History chart
- Technical Comparison between Unix Diffrences (4 Replies)
Discussion started by: killerserv
4 Replies
2. UNIX for Dummies Questions & Answers
I tried looking for the answer online and came up with only a few semi-answers as to why file and directory names are case sensitive in Unix. Right off the bat, I'll say this doesn't bother me. But I run into tons of Windows and OpenVMS admins in my day job who go batty when they have to deal... (3 Replies)
Discussion started by: deckard
3 Replies
3. UNIX and Linux Applications
Hi everybody Im Megadrink!!!
This is my first thred.
Ive recently been introduced to Unix and i was interested in Unix's History. Can anyone give me a breif History On Unix. Just when it was invented/released. Maybe someother cool things about it.
Thx for the information in advance!! :D (2 Replies)
Discussion started by: Megadrink
2 Replies
4. Hardware
Dear all,
i am in last year of electronics department in engineering faculty
i need suggestions for a graduation project based on unix or free bsd or linux and electronics "embedded linux "
i think about embedded unix for example or device drivers
please i need helps (1 Reply)
Discussion started by: MOHA-1
1 Replies
5. UNIX and Linux Applications
Dear all,
i am in last year of electronics department in engineering faculty
i need suggestions for a graduation project based on unix or free bsd or linux and electronics "embedded linux "
i think about embedded unix for example or device drivers
please i need helps (1 Reply)
Discussion started by: MOHA-1
1 Replies
6. UNIX for Advanced & Expert Users
Dear all,
i am in last year of electronics department in engineering faculty
i need suggestions for a graduation project based on unix or free bsd or linux and electronics "embedded linux "
i think about embedded unix for example or device drivers
please i need helps (1 Reply)
Discussion started by: MOHA-1
1 Replies
7. Homework & Coursework Questions
Dear all,
i am in last year of electronics department in engineering faculty
i need suggestions for a graduation project based on unix or free bsd or linux and electronics "embedded linux "
i think about embedded unix for example or device drivers
please i need helps (1 Reply)
Discussion started by: MOHA-1
1 Replies
8. Shell Programming and Scripting
Hi guys,
I am currently working as a system administration engineer, administering telecom applications on linux/unix platforms.
I want to learn new things and improve the ones that i have and for this i though to really work on some project or something but i lack of ideas.
I want to be... (2 Replies)
Discussion started by: capitanui
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9. Shell Programming and Scripting
commands to view the history file in unix.
I am not sure whether it is bash_history.sh (1 Reply)
Discussion started by: ramkumar15
1 Replies
10. What is on Your Mind?
I am pleased to announce this new video in 1080 HD for UNIX lovers honoring thirty years of UNIX history spanning from 1969 to 1999 presented in 150 seconds (two and a half minutes) in 1080 HD, celebrating the 50th anniversary of UNIX.
The Great History of UNIX (1969-1999) | 30 Years of UNIX... (8 Replies)
Discussion started by: Neo
8 Replies
LEARN ABOUT DEBIAN
readahead
READAHEAD(2) Linux Programmer's Manual READAHEAD(2)
NAME
readahead - perform file readahead into page cache
SYNOPSIS
#define _GNU_SOURCE /* See feature_test_macros(7) */
#include <fcntl.h>
ssize_t readahead(int fd, off64_t offset, size_t count);
DESCRIPTION
readahead() populates the page cache with data from a file so that subsequent reads from that file will not block on disk I/O. The fd
argument is a file descriptor identifying the file which is to be read. The offset argument specifies the starting point from which data
is to be read and count specifies the number of bytes to be read. I/O is performed in whole pages, so that offset is effectively rounded
down to a page boundary and bytes are read up to the next page boundary greater than or equal to (offset+count). readahead() does not read
beyond the end of the file. readahead() blocks until the specified data has been read. The current file offset of the open file referred
to by fd is left unchanged.
RETURN VALUE
On success, readahead() returns 0; on failure, -1 is returned, with errno set to indicate the cause of the error.
ERRORS
EBADF fd is not a valid file descriptor or is not open for reading.
EINVAL fd does not refer to a file type to which readahead() can be applied.
VERSIONS
The readahead() system call appeared in Linux 2.4.13; glibc support has been provided since version 2.3.
CONFORMING TO
The readahead() system call is Linux-specific, and its use should be avoided in portable applications.
SEE ALSO
lseek(2), madvise(2), mmap(2), posix_fadvise(2), read(2)
COLOPHON
This page is part of release 3.44 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
Linux 2010-09-10 READAHEAD(2)