Red Hat System Administration III - Unit 16 - File Sharing With NFS

• Complete redesign of NFS v3
• Adds: root psuedo fs
• Supports Kerberos for all implementations
• Requires no auxillary services
• Easier to secure behind firewall
• Use on new deployments where possible

Syntax to create NFS share

• Using mount:

  mount <ip_address>:/to/path /mount
  

• Improved user mapping support

• Main file: /etc/exports
• How to setup:

• Create user with same uid on both client and server

  > useradd -u 700 nfs_user
  

• Make export directories

  > mkdir -p /exports/{read,write}
  

• Ensure owned by user

  > chown nfs_user /exports/write/
  

• Create dirs

  > touch /exports/{read,write}/{1,2,3}
  

• Edit exports file

  > vi /etc/exports
  /exports/read   *(ro,async)
  /exports/write  182.168.0.0/24(rw,sync,no_root_squash)
  

• Start daemon

  > exportfs -r # Optional, same as service reload
  > service nfs start
  

Examples:

• Export /common to example.com domain

  > vi /etc/exports
  /common     192.168.0.0/24(rw,async)
  > exportfs -r
  

• How to mount

  > vi /etc/fstab
  demo.example.com:/exports/read  /mnt    nfs  ro,vers=4 0 0
  

• Client-side options

  • rw - filesystem is writable
  • ro - filesystem is read-only
  • vers=4 - try to mount using NFS version specified only.
  • soft - if NFS request times out, return an error after 3 tries