Free nfs software for linux

Linux NFS Utilities are NFS utilities for Linux NFS clients and servers.
Main features:
- NFS Versions 2, 3, and 4 are supported on 2.6 and later kernels.
- NFS over UDP and TCP on IPv4 are supported on the latest 2.4 and 2.6 kernels.
- Linux NFS clients and servers have been tested against many non-Linux implementations.
- Since version 1.0.1 of the NFS utilities tarball has changed the server export default to "sync", then, if no behavior is specified in the export list (thus assuming the default behavior), a warning will be generated at export time.
- If you plan to deploy NFS extensively, consider subscribing to one of these mailing lists: NFS Mailing List, or the AutoFS Mailing List. Before reporting problems, you should search for similar issues in the searchable mail archive. Another searchable archive for NFS, supported by Google, is here. The searchable mail archive for AutoFS is here.
- A useful set of generic NFS references includes the following:
- - "NFS Illustrated," by Brent Callaghan; Addison-Wesley, 2000.
- - "Managing NFS and NIS, 2nd edition," by Hal Stern, Mike Eisler, Ricardo Labiaga; OReilly, 2001.
- - "Linux NFS and Automounter Administration," by Erez Zadok; Sybex, 2001.
- - "Using the Linux NFS Client with Network Appliance Filers," by Charles Lever; Netapp TR-3183, 2004.
- - "Mike Eislers NFS blog."
- - "Eric Kustarzs blog."
- - "NFS version 4 home page."
- - Finally, the "linux.org online library" has many references.
Quick setup client guide
1. Acquire and install a recent distribution of Linux.
2. Set up your /etc/exports file (man exports for details).
3. Consult your distributions documentation to determine which /etc/init.d start-up script is used to start your server. Start NFS services by invoking this script as root, using the "start" parameter. Consider adding this script to the list of scripts that are automatically run at system start-up. (Red Hat uses the chkconfig command for this purpose).
4. Read the NFS How-To for advice on tuning and securing your server.
Quick Client Setup Guide
1. Acquire and install a recent distribution of Linux. To enable NLM lock recovery, ensure your clients host name, as returned by uname -n, matches the host name returned by DNS.
2. The NLM protocol is handled by an in-kernel service in modern kernels, but the user-level rpc.statd program must be running to enable NLM lock recovery. Consult your distributions documentation to determine which /etc/init.d start-up script is used to start it. Start the NSM daemon by invoking this script as root, using the "start" parameter. Consider adding this script to the list of scripts that are automatically run at system start-up. (Red Hat uses the chkconfig command for this purpose).
3. Create the directories on your client where you will mount the NFS shares.
4. Add entries in /etc/fstab corresponding to your mount points (man nfs for details).
5. Use mount -a -t nfs to mount the NFS shares.
6. During system boot-up, most distributions automatically mount NFS shares that are listed in /etc/fstab. If yours doesnt, check your distributions documentation for instructions on how to configure your client to do this.
Enhancements:
- The "mount.nfs" command was added, since the nfs mount functionality is being migrated from util-linux to nfs-utils.
- Substantial changes to were made statd. Various pieces of old code were removed.
- Lots of bugfixes and improvements were made.

FreeNAS is a free implementation of a minimal FreeBSD distribution(for run it on a Compact Flash, CD-ROM or USB key) that provide NAS (Network-Attached Storage) services, supporting: CIFS, FTP, NFS protocols, with a Full WEB configuration interface.

The minimal FreeBSD distribution, Web interface,PHP scripts and documentations are based on M0n0wall.

File::NFSLock is a Perl module to do NFS (or not) locking.
SYNOPSIS
use File::NFSLock qw(uncache);
use Fcntl qw(LOCK_EX LOCK_NB);
my $file = "somefile";
### set up a lock - lasts until object looses scope
if (my $lock = new File::NFSLock {
file => $file,
lock_type => LOCK_EX|LOCK_NB,
blocking_timeout => 10, # 10 sec
stale_lock_timeout => 30 * 60, # 30 min
}) {
### OR
### my $lock = File::NFSLock->new($file,LOCK_EX|LOCK_NB,10,30*60);
### do write protected stuff on $file
### at this point $file is uncached from NFS (most recent)
open(FILE, "+<<less