Nfs Centos Setting

$ sudo zfs set sharenfs="[email protected] This package also contains the showmount program. My Freenas, Windows 10 CIFS, Centos 7 NFS, permission dilemma. So you do not need to install NFS server on your own, and just need to set up NFS export. 6 using NFS method [CentOS] Two NFS issues [CentOS] nfs high load issues; NFS problem in the latest kernel (Was: [CentOS] MySQL issues with kernel-2. 28-rc1 allows attackers to cause a denial of service (memory corruption or system crash) via an hfs filesystem image with an invalid catalog namelength field, a related. Setting Up the. x86_64 already installed and latest version Package nfs-utils-lib-1. NFS is easy to set up and easy to use. I had previously been able to configure an NFS server on a computer running CentOS 6. map is not recognized on centos 7 x86_64 with nfs-server installed by default. environment hostname ip node cent7no12 172. 0 distributed file system access server under CentOS / RHEL v5. 131, networking type is bridged. Use this procedure to manually mount to NFS on a Linux client. We have 1 system ruining Centos7 that is the NFS server. Step:3 Authenticate nfs nodes and form a cluster. DNS Server Configuration on RHEL/CentOS 7 by Yogesh Mehta · Published January 24, 2017 · Updated January 24, 2017 In this article and the below YouTube video , you're going to see how to set up a DNS Server on RHEL/CnetOS 7. 0 distributed file system access server under CentOS / RHEL v5. For this purpose, I'm setting up two CentOS 6. It's more complex, and has a few drawbacks, but it's much more resilient to network disconnects. png Aug 22, 2018. This step by step installation and configuration method of NFS server is work in Fedora 22 version also. Parallel NFS (pNFS) extends Network File Sharing version 4 (NFSv4) to allow clients to directly access file data on the storage used by the NFSv4 server. org, a friendly and active Linux Community. In some cases, however, it pays to specify these settings explicitly using mount options. Last week I did a fresh install of all the OSs I had, and now for some reason I cannot get it to work. I'm trying to share files from my Mac to a web server hosted in VirtualBox running Centos. This is not as secure as. 241 nfs server setting for nfs-server on cent7no41 # yum -y install nfs-utils # vi /etc/idmapd. , a 501(c)3 nonprofit corporation, with support from the following sponsors. To get started installing the admin node, insert the CentOS installation DVD into the system that will act as the admin node. Manage OpenSSHD settings, freeze kernel upgrades, toggle hardware settings. 6 as an NFS server. One requirement for setting up cachefiles is that local filesystem support user-defined extended file attributes (i. ) Check server's NFSv4 capability. png Aug 22, 2018. How to Setup NFS (Network File System) on RHEL/CentOS/Fedora and Debian/Ubuntu Setup and Configure NFS Mounts on Linux Server. 0 distributed file system access server under CentOS / RHEL v5. 0 of nfs-utils onwards, the default will be no_subtree_check as subtree_checking tends to cause more problems than it is worth. sudo yum install nfs-utils nfs-utils-lib Add sharing points to exports file. Orange Box Ceo 7,004,597 views. It is very useful when it is implemented for accessing shared home folders. cd /nfs/mpich-3. An NFS mount is set up between at least two servers. Kickstart files contain answers to all questions normally asked by the installation program, such as what time zone you want the system to use, how the drives should be partitioned, or which packages should be installed. The precise steps you must take to set up an NFS server will vary based on the system’s architecture, operating system, package manager, service manager, and other factors. What is Fail2Ban. Start off by using apt-get to install the nfs programs. and setup NFS on that. By implementing the user and group disk quota on the file system we can resolve the space issue. Environment. TurnKey File Server includes support for SMB, SFTP, NFS, WebDAV and rsync file transfer protocols. VMware delivers virtualization benefits via virtual machine, virtual server, and virtual pc solutions. Installing it is pretty easy until a lot of errors start popping out when you try to start your openvz, so i though of just writing them down just in case. Setup OpenVZ NFS Server on Centos i though i writing this down how i setup my own openvz nfs server container to serve as a NFS server. Setting up an NFS Share on Windows is a simple way to transfer data from Linux to Windows, especially if migrating Retain from Linux to Windows. If you put neither option, exportfs will warn you that the change is pending. Boot the installer and select mostly all defaults. Add iptables rules to allow NFS communication. In order for our two servers to be able to communicate in this. I don't know if Raspbian uses NetworkManager but if it does, that may be your problem. nixCraft posted a guide about setting up a NFS v4. Normally, vi will forget the setting you've chosen once you've left the editor. com] Setting Up an NFS Server [nfs. rpm) [CentOS] DRBD NFS load issues [CentOS] NFS and iptables issues [CentOS] NFS and. If you genuinely require subtree checking, you should explicitly put that option in the exports file. NFS server will enables it's client to mount a file system on a remote server as if it were local to your own system. Kerberos will know about the NFS server, Kerberos will know about the NFS clients, and Kerberos will know about the user. The nfs-utils package provides a daemon for the kernel NFS server and related tools. x for sharing files with UNIX and Linux workstations? How to export a directory with NFSv4? How to mount a directory with NFSv4? Network File System (NFS) is a network file system protocol originally developed by. In enterprise use, what wold you do?. Though i have tested these steps in CentOS 6. For CentOS/RHEL 7 systemctl stop dhcp ystemctl restart dhcp For CentOS/RHEL 6/5 service dhcp stop service dhcp restart Step 5: Setup Client System At this stage we have a running dhcp server which is ready for accepting requests and assign them a proper ip. Or are you moving files from the CentOS 7 NFS server to the CentOS 6 NFS client? If the former, i. Creating secure folder with member only access. In this tutorial let us see how to install and configure NFS server and how to share files between NFS server and clients. So we will have two network interfaces on our LoadBalancer eth0 will be set with our real world IP of 192. DOVECOT The Secure IMAP server. * on centos 7. Setting NFS Ports If the applications you plan to use with the mounted Cloud Filestore fileshare require NFS file locking, and your Cloud Filestore instances are using something other than the default VPC network with unchanged settings, you might need to set the ports for the statd and nlockmgr daemons on your client VM instances in order to. I recommend having a firewall installed. 0 - no updates installed, all you have to do it import the key tabs on both servers, mount the share with sec=krb5p and run nfs-secure-server and nfs-secure, and it will work. Start off by using apt-get to install the nfs programs. Other services and daemons such as automount can be used to mount remote NFS shares without user intervention. Right now there are two options for SGE installation on CENTOS 7: Use of rock cluster (Rocks 7. Check that idmapping is configured. for testing and evaluating) to a rackmounted or clustered solution. rpm: 2019-08-22 21:19 : 277K. Centos, Amazon Linux, NFS and the dreaded nobody problem Jan 31. Although it has not been designed specifically to set benchmark records, Apache 2. No need to edit /etc/exports and run exportfs. This is the NFS mount daemon that implements the server side of the mount requests from NFSv3 clients. How To Use Kerberos to Control Access to NFS Network Shares Posted by Jarrod on June 22, 2016 Leave a comment (7) Go to comments By default NFS is not very secure, there's no real authentication and access is granted based on hostname or IP address, information is sent over the network in plain text, and it's also fairly easy to fake your. 11 respectively. Use NFS instead of UNC shares (CIFS). The NFS server needs a list of exports (see exports(5) for details) which are defined in /etc/exports or /etc/exports. The SHA256 checksums of the images are signed with the CentOS 7 Official Signing Key. Testing the NFS Mount. NFS server will enables it's client to mount a file system on a remote server as if it were local to your own system. 4 Exporting Directories. First install the necessary packages. The nfs-utils package provides a daemon for the kernel NFS server and related tools. Part 8 of setting up a Linux home lab environment with VirtualBox. NFS (Network File System) allows you to 'share' a directory located on one networked computer with other computers/devices on that network. Removing the NFS Mount. While this section is not designed to provide a complete guide to any of these services, it provides a description of how you can configure a yum repository server. I remember some panic when using LSI recently but I did not debug it further as modern OS should use virtio-scsi anyways. After the client is granted access by TCP wrappers, the NFS server refers to its configuration file, /etc/exports , to determine whether the client is allowed to access any of the exported file systems. You can set this number globally and for individual subloggers. So we will have two network interfaces on our LoadBalancer eth0 will be set with our real world IP of 192. png Aug 22, 2018. If necessary, you can set the first boot priority in the BIOS as USB-HDD or USB-ZIP so that it can boot Clonezilla Live from your USB flash drive. NFS server is used to make its data generally available to clients. This tutorial shows how to convert a plain CentOS machine into an NFS server by installing the NFS Linux packages and configuring access to shared directories. no_root_squash: This phrase allows root to connect to the designated directory; insecure: The default NFS setting is "secure" which requires that requests originate on an Internet port less than IPPORT_RESERVED (1024). 0014657: PXE Mount Failed with IPv6 for mount NFS Description Run PXE mount process on CentOS 7. Setting up NFS and Subversion on Centos 6 JavaScript seems to be disabled in your browser. In this tutorial let us see how to install and configure NFS server and how to share files between NFS server and clients. Setting up an NFS Share on CentOS 5. First we need to set static port for nfs services such as rquotad, mountd, statd, and lockd by editing /etc/sysconfig/nfs file. Boot the installer and select mostly all defaults. Only valid with fstype nfs. Login to the webinterface and navigate to “System -> Data Centers -> Default -> Storage -> New Domain”: Do the same for the SSD, SATA, ISO and export domain. 100 NFS Client: 2 Configure the Firewall. I know it is dev/sdb but that is as far as I can go Any help would be appreciated!!. Also make sure that anonymous users (i. In most cases, the mount(8) command, NFS client, and NFS server can automatically negotiate proper transport and data transfer size set- tings for a mount point. Storage Server. NFS enables you to mount a remote share locally. sourceforge. Setting Up the NFS Server - 192. I assume that you want to export /export directory via NFS. defaultSize: Default size of the log, in KB, before the system rotates logs. There is somewhere a bug in the QNAP NFS server implementation (Firmware 3. This guide explains how to set up an NFS server and an NFS client on CentOS 7. Setting up the Server As the base operating system for the NFS server, I used a virtual machine with 2 vCPUs with 16GB of RAM running on a ESXi 6. CentOS is a freely-available Linux distribution that is based on Red Hat Enterprise Linux. Quick NFS HOWTO for Centos. Performing the default "Minimal" install of CentOS 6 does not install the graphical subsystem (the X. This section will cover the simple network configuration changes needed to set a static IP network address for your server. Once you. Best Practices running VMware with NFS. This tutorial shows how to convert a plain CentOS machine into an NFS server by installing the NFS Linux packages and configuring access to shared directories. The default is dependent on the kernel. defaults - Use default settings. This is a major difference between NFSv3, where this is true, and NFSv4 which solely uses TCP port 2049, so this largely depends on which version of NFS you plan to use or enforce. PXE allows you to boot up a system and have it automatically get an IP address via DHCP and start booting a kernel over the network. Setting it up is pretty easy and straight forward. Setup NFS Server in CentOS / RHEL / Scientific Linux 6. After the client is granted access by TCP wrappers, the NFS server refers to its configuration file, /etc/exports , to determine whether the client is allowed to access any of the exported file systems. Im having an unusual amount of trouble setting up CentOS 6. How to install Apache Server on CentOS, RedHat, Linux. It allows you to mount your local file systems over a network and remote hosts to interact with them as they are mounted locally on the same system. 6 using conda. Though i have tested these steps in CentOS 6. If the names do not match exactly, the hosts see the same NFS volume as two different datastores. no_root_squash: This phrase allows root to connect to the designated directory; insecure: The default NFS setting is "secure" which requires that requests originate on an Internet port less than IPPORT_RESERVED (1024). Added NFS share (v3). x86_64 if not, install it: $ sudo yum install rpcbind Install NFS-related packages: $ sudo yum install nfs-utils nfs-utils-lib Once installed, configure the nfs, nfslock and rpcbind to run as daemons: $ sudo chkconfig…. [CentOS] Setting up NFS on Centos 6. Linux, android, bsd, unix, distro, distros, distributions, ubuntu, debian, suse, opensuse, fedora, red hat, centos, mageia, knoppix, gentoo, freebsd, openbsd. , all-text mode) runlevel (i. The follow three examples show you how to set your HTTP, HTTPS and NO_PROXY settings. #Set permissions. If you have downloaded, created, or rebuilt RPM packages locally (as explained in TipsAndTricks/YumAndRPM "Get set up for rebuilding packages while not being root") you may want a place to put them so they are accessible from all the machines on your local net. example: [email protected] ]$ apropos search (this command displays a list of possible commands and their respective descriptions with the string “search” in the command or in the command. Now in local network 99% of users are using isilon from linux centos 7. Install the required packages on the NFS server:. How To Set Up an NFS Mount on CentOS 6 Setup. NFS is a convenient way to share files across Linux systems on your network. Disable Network File System (nfs) systemctl disable nfs If you don’t need SSH disable it systemctl disable sshd Disable SSH iptables Firewall rule. The same steps are applicable for RHEL and Scientific Linux 7 distributions. These options are stored on disk by the NFS mount subcommand, and can be erased by a remount. Setting this value to 0 will cause the processes to never reach a limit. The Rocks-supplied OS rolls have all updates applied as of December 1, 2017. CentOS 7 / RHEL 7 supports Fail-over cluster using pacemaker. 0 Build 0627T) and the Sun Solaris 10 Client. 80) to automount folder located on remote computer (192. Network File System (NFS) is a popular distributed filesystem protocol that enables users to mount remote directories on their server. Based on Samba and SambaDAV. Enable or Disable Service At Boot on CentOS 7 Mattias Geniar, Saturday, August 8, 2015 This post will show you how to enable or disable a service to start on boot, on a RHEL or CentOS 7. NFS stands for Network File System. How To Setup an NFS Mount on CentOS 7 NFS, short for Network File System, is a client-server system that enables users to access network files as though they were part of the local file directory. com] Setting Up an NFS Server [nfs. x is capable of high performance in many real-world situations. 0: Release: 957. This has the advantage of saving disk space, as the home directory is only kept on one virtual private server, and others can. For example, let's assume the IP addresses of server and client are 12. I have a CentOS 7 installation on a system with 2 drives, I want to set up the entire 2nd drive as NFS. Software used in this article: CentOS 6; nfs-utils 1. environment hostname ip node cent7no12 172. Install Zabbix Server 4. This might result in a failure of such features as vMotion. Parent Directory - 389-ds-base-1. Last week I did a fresh install of all the OSs I had, and now for some reason I cannot get it to work. 212 nfs client cent7no41 172. Setting Up An NFS Server And Client On CentOS 6 NFS (Network File System) allows you to 'share' a directory located on one networked computer with other computers/devices on that network. I had previously been able to configure an NFS server on a computer running CentOS 6. NFS server is used to make its data generally available to clients. I don't have an el6 NFS server but on el5 it's controlled by /etc/sysconfig. How to Configure NFS Server Clustering with Pacemaker on CentOS 7 / RHEL 7 Step:1 Set Host name on both nfs servers and update /etc/hosts file. At this point I wanted to make sure server will do nfs mounts automatically at boot up. Created a directory mkdir -p /mnt/nfs/. I verified the ip by typing "*", and then try to mount nfs on centos, and storage is connected. NFS server will enables it's client to mount a file system on a remote server as if it were local to your own system. NFS Stands for ( Network File System ) also known as Linux File Server is a Network service in Linux used to share the File System/Directory of the Server to Users/clients on the network like Map Drive in Windows Systems and user can access and store data on Central Location but This can be Possible only between Linux to Linux Systems or. CentOS-7 NFS. edu Package 1:nfs-utils-1. In order for our two servers to be able to communicate in this. This section explains how to configure OpenStack Block Storage to use NFS storage. 2; Installation # yum install nfs-utils nfs-utils-lib # chkconfig nfs on # /etc/init. Moved the virtual machine from the new share back, averaged around 900mbit/s. This article will help you to find answer for where are my nfs logs? Find NFS log file location or where nfs daemon logs events? There is NFS logging utility in Solaris called nfslogd (nfs transfer logs). Dovecot is an excellent choice for both small and large installations. It could turn out to be a life saver for you. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. The server is configured to allow server users to manage files in private or public storage. This section explains how to configure OpenStack Block Storage to use NFS storage. Note1: Since RHEL 7. [CentOS] NFS help. There are two open source user space NFS servers which you can use: nfs-ganesha or dCache. NFS server is used to make its data generally available to clients. I have already created my exportfs file and run "chkconfig nfs on". The Linux CacheFS currently is designed to operate on. I know it is dev/sdb but that is as far as I can go Any help would be appreciated!!. For example, if you have Clonezilla Live in USB flash drive, you have to boot it via USB device (Ex. Type sudo armbian-config and change timezone, reconfigure language, locales, network. mkdir /nfs/mpich3. All specified devices within /etc/fstab will be automatically mounted on startup and when the -a flag is used with mount(8) unless the noauto option is specified. NFS stands for Network File System; through NFS, a client can access (read, write) a remote share on an NFS server as if it was on the local hard disk. First install the necessary packages. 5 32 bit edition, it will work on RHEL/Scientific Linux 6. NFS Server Hostname: server. Offering general guidelines for setting up a well-functioning file server is outside the scope of this document, but a few hints may be worth mentioning:. Ubuntu Eoan [module & tools]. You can use HFS (HTTP File Server) to send and receive files. Setting it up is pretty easy and straight forward. Power user Petra has a four-disk RAID5 workstation. edu * extras: centos. abhinas raj wrote:how i can check value of barrier in centos ? /proc/mounts will show you the current setting. ID: 165777: Name: kernel-azure: Version: 3. A fresh installation of XenServer comes with NFS server already installed. Click on a list name to get more information about the list, or to subscribe, unsubscribe, and change the preferences on your subscription. Dedicated FreeNAS box running 9. You can follow along this article using this vagrant project on Github. In some cases, however, it pays to specify these settings explicitly using mount options. This dynamic IP address assignment will need to be changed to a static IP address. The above setup allows everyone to access that folder. If your operating system comes with SELinux pre-installed as in the case for CentOS 7 and RHEL 7, SELinux is set to enforcing mode by default. 6 using conda. #service nfs start 4. For NFS server setup, refer to Install and Configure NFS Server on CentOS / RHEL 8. NFS is a UNIX based technology but can be used by most of the operating systems like Linux, Ubuntu, Debian, Kali, Mint, Fedora, CentOS, RedHat and Windows operating systems Windows 7, Windows 8, Windows 10, Windows. The rpcdebug command allows an administrator to set and clear the Linux kernel's NFS client and server debug flags. Automating snapshots with pyznap on Centos 7; Understanding ZFS : Checksum; Install PHP 7 Stats on Centos 7; Change default kernel boot Centos 7; Apache Failed to create shared memory; Use Autofs on Rocks cluster to. CONFIGURE NETWORK AND FILE SHARING (NFS). Start off by using apt-get to install the nfs programs. On the nfs-server and nfs-client you need heimdal-clients and optional libpam-krb5 if you wish to authenticate against krb5. I have already created my exportfs file and run chkconfig nfs on. Let me describe my setup before I get into the issue. NFS Server Hostname: server. To turn this setting off, specify insecure. Setting Up an NFS Server and Client on CentOS 7. How To Setup an NFS Mount on CentOS 7 Getting Started. Setting Up An NFS Server And Client On CentOS 6 NFS (Network File System) allows you to 'share' a directory located on one networked computer with other computers/devices on that network. On the NFS client this shared folder looks like just an ordinary folder. azure: Epoch: Arch: x86_64: Summary: The Linux kernel: Description: The kernel package contains. NFS Server Operating System : CentOS 6. Quick NFS HOWTO for Centos. Set up Debian 10 as a NFS server to start sharing. Setting Up Clients and Services. 555 respectively. Also, both the machines should be set up as root. Install Zabbix Server 4. 1, the nfs-secure service automatically starts if there is a /etc/krb5. Test the Working of NFS Setup. Moved the virtual machine from the new share back, averaged around 900mbit/s. Here i explained about 1. NFS is a server/client oriented protocol, which means that in order to share files and folders with your NFS clients you first need to configure NFS server! By successfully setting up and configuring your NFS server and exporting all of the NFS shares to your clients you are now ready to mount NFS shares on the client side. 5GB de RAM, 30GB de HD. NFS (Network File System) allows you to 'share' a directory located on one networked computer with other computers/devices on that network. There is somewhere a bug in the QNAP NFS server implementation (Firmware 3. First you need to install NFS services on the server that will host: Setting up an NFS Share on Windows is a simple way to transfer data from Linux to Windows, especially if migrating Retain from Linux to Windows. On the NFS client this shared folder looks like just an ordinary folder. Create Local Repos. Setting Up the NFS Client. Setting Up an NFS Server and Client on CentOS 7. It groups containers that make up an application into logical units for easy management and discovery. Setting Up the Admin Node. First you need to install NFS services on the server that will host: Setting up an NFS Share on Windows is a simple way to transfer data from Linux to Windows, especially if migrating Retain from Linux to Windows. It's more complex, and has a few drawbacks, but it's much more resilient to network disconnects. You can set this number globally and for individual subloggers. After editing /etc/sysconfig/nfs, you need to restart the nfs-config service for the new values to take effect in Red Hat Enterprise Linux 7. This tutorial covers setting up an NFS mount on CentOS. Test the Working of NFS Setup. Configure NFS Server v3 and v4 on Scientific Linux 6 and Red Hat Enterprise Linux (RHEL) 6 March 18, 2011 awalrath Leave a comment Go to comments Recently the latest version of Scientific Linux 6 was released. (/etc/idmapd. Offering general guidelines for setting up a well-functioning file server is outside the scope of this document, but a few hints may be worth mentioning:. Able to read and write contents, but when I am checking ownership of files at the mounted volume. NFS stands for Network File System; through NFS, a client can access Setting Up An NFS Server And Client On CentOS 6. Here are mt testing nodes details. Setting Up the NFS Server - 192. RHCE Series: Setting Up NFS Server with Kerberos Authentication – Part 7. A minimal set up offers a brand new model of the ifup and ifdown scripts that decision NetworkManager by way of the nmcli tool. Network File System is used for to share files and folders between Linux / Unix systems. This article will help you to find answer for where are my nfs logs? Find NFS log file location or where nfs daemon logs events? There is NFS logging utility in Solaris called nfslogd (nfs transfer logs). Also make sure that anonymous users (i. This guide explains how to set up an NFS server and an NFS client on CentOS 6. After editing /etc/sysconfig/nfs, you need to restart the nfs-config service for the new values to take effect in Red Hat Enterprise Linux 7. NFS (01) Configure NFS Server (02) Conf NFS Client(CentOS) (03) NFS 4 ACL Tool (04) Conf NFS Client(Win Server) (05) Conf NFS Client(Win Client) iSCSI (01) Configure iSCSI Target (02) Configure iSCSI Target (tgt) (03) Conf iSCSI Initiator(CentOS) (04) Conf iSCSI Initiator(Win) Ceph Nautilus (01) Configure Ceph Cluster (02) Use. com” and “nfs2. 28-rc1 allows attackers to cause a denial of service (memory corruption or system crash) via an hfs filesystem image with an invalid catalog namelength field, a related. When setting up mounts, NFS is most effective for permanent fixtures that should always be accessible. Created a NFS share set to mount as root; Connected to an ESXi host (managed by vcenter) directly. 7 x64 on DigitalOcean. A symbolic link, also termed a soft link, is a special kind of file that points to another file, much like a shortcut in Windows or a Macintosh alias. Location of NFS logs on Centos [serverfault. Manage OpenSSHD settings, freeze kernel upgrades, toggle hardware settings. harun January 29, 2018 January 29, 2018 No Comments on Setup NFS Server on Centos 7 Introduction NFS stands for Network File System, a distributed filesystem protocol that enables users to mount remote filesystems onto their server. Ubuntu Eoan [module & tools]. DRBL SERVER Centos 7. Now when your NFS settings are correct you should be able to mount nfs filesystem from you client machine. Setup NFS Server in CentOS / RHEL / Scientific Linux 6. Here we take CD as an example. NFS on CentOS 7 & Windows 10 NFS Client Configuration By dmitry Linux , Microsoft , Networking , Technology 0 Comments I just finished building a really nice Windows 10 home workstation to replace my aging and sluggish 2013 Mac Pro system. It has configuration file /etc/nfs/nfslog. The “insecure” option allows requests from ports above 1024. From the bash man page: The shell treats each character of IFS as a delimiter, and splits the results of the other expansions into words on these characters. I am mounting contents of the home folder of remote user to local host. Based on Samba and SambaDAV. Current users will be able to install it from our YUM and APT repositories. Power user Petra has a four-disk RAID5 workstation. In enterprise use, what wold you do?. This guide explains how to configure an NFS server on CentOS 7. Firewalld is a firewall management tool for Linux operating systems. NFS stands for Network File System; through NFS, a client can access (read, write) a remote share on an NFS server as if it was on the local hard disk.