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Operating Systems BSD for linux and BSD users interested in Unix system V/bsd
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Old 12-04-2004
Java for linux and BSD users interested in Unix system V/bsd Documentation

for all you unix/linux interested heres an online book for free that covers the basics of BSD SysV Unix commands and applications . giving the average linux user a perspective on the differences in context of the two operating systems and for BSD users covers material as a refernce guide.

Name: Illustrated Unix SystemV/BSD Author: Robert Felps
http://duplex.hypermart.net/books/bsd/index.html
moxxx68

Last edited by moxxx68; 12-04-2004 at 01:47 AM..

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Linux distributions are the most famous and healthiest example of the Unix derivatives; but macOS is currently the largest installed Unix user base (2019).
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LINUX(4)						   BSD Kernel Interfaces Manual 						  LINUX(4)

NAME
linux -- Linux ABI support SYNOPSIS
To compile support for this ABI into an i386 kernel place the following line in your kernel configuration file: options COMPAT_LINUX for an amd64 kernel use: options COMPAT_LINUX32 Alternatively, to load the ABI as a module at boot time, place the following line in loader.conf(5): linux_load="YES" DESCRIPTION
The linux module provides limited Linux ABI (application binary interface) compatibility for userland applications. The module provides the following significant facilities: o An image activator for correctly branded elf(5) executable images o Special signal handling for activated images o Linux to native system call translation It is important to note that the Linux ABI support it not provided through an emulator. Rather, a true (albeit limited) ABI implementation is provided. The following sysctl(8) tunable variables are available: compat.linux.osname Linux kernel operating system name. compat.linux.osrelease Linux kernel operating system release. Changing this to something else is discouraged on non-development systems, because it may change the way Linux programs work. Recent versions of GNU libc are known to use different syscalls depending on the value of this sysctl. compat.linux.oss_version Linux Open Sound System version. The linux module can be linked into the kernel statically with the COMPAT_LINUX kernel configuration option or loaded as required. The fol- lowing command will load the module if it is neither linked into the kernel nor already loaded as a module: if ! kldstat -v | grep -E 'linux(aout|elf)' > /dev/null; then kldload linux > /dev/null 2>&1 fi Note that dynamically linked Linux executables will require a suitable environment in /compat/linux. Specifically, the Linux run-time linker's hints files should be correctly initialized. For this reason, it is common to execute the following commands to prepare the system to correctly run Linux executables: if [ -x /compat/linux/sbin/ldconfig ]; then /compat/linux/sbin/ldconfig -r /compat/linux fi For information on loading the linux kernel loadable module automatically on system startup, see rc.conf(5). This information applies regardless of whether the linux module is statically linked into the kernel or loaded as a module. FILES
/compat/linux minimal Linux run-time environment /compat/linux/proc limited Linux process file system /compat/linux/sys limited Linux system file system SEE ALSO
brandelf(1), elf(5), linprocfs(5), linsysfs(5) HISTORY
Linux ABI support first appeared in FreeBSD 2.1. BSD
February 8, 2010 BSD

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