Configuring NFS Server on Linux

on Server

UnbutuRHEL 7Fedora 42RHEL 4.8

~$ sudo apt install nfs-kernel-server

~$ sudo mkdir /nfs
~$ sudo chmod a+w /nfs
~$ sudo cat >>/etc/exports <<EOF
/nfs  10.10.10.222/24(rw,sync,no_subtree_check)
EOF

~$ sudo systemctl enable nfs-kernel-server
~$ sudo ufw allow from 10.10.10.1/24 to any port nfs

~$ showmount -e localhost

~]# yum -y install nfs-utils

~]# mkdir /nfs
~]# chmod a+w /nfs
~]# cat >>/etc/exports <<EOF
/nfs  *(rw,sync,no_root_squash)
EOF

~]# systemctl enable --now rpcbind
~]# systemctl enable --now nfs-server
~]# firewall-cmd --permanent --add-service=nfs
~]# firewall-cmd --permanent --add-service=rpc-bind
~]# firewall-cmd --permanent --add-service=mountd
~]# firewall-cmd --reload

~]# showmount -e localhost
Export list for localhost:
/nfs *

~]$ sudo dnf -y install nfs-utils

~]$ sudo mkdir /nfs
~]$ chmod a+w /nfs
~]$ cat >>/etc/exports <<EOF
/nfs  *(fsid=0,rw,sync,no_root_squash,no_subtree_check,crossmnt)
EOF

~]$ sudo systemctl enable --now nfs-server
~]$ sudo firewall-cmd --permanent --add-service=nfs
~]$ sudo firewall-cmd --permanent --add-service=rpc-bind
~]$ sudo firewall-cmd --permanent --add-service=mountd
~]$ sudo firewall-cmd --reload

~]# showmount -e localhost
Export list for localhost:
/nfs *

~]# rpm -qa | grep nfs
nfs-utils-1.0.6-93.EL4
nfs-utils-lib-1.0.6-10.el4

~]# cat >>/etc/exports <<EOF
/nfs  *(rw,sync,no_root_squash)

~]# service nfs restart
~]# showmount -e localhost
Export list for localhost:
/nfs (everyone)

on Client

RHEL 7AIX 7.2

~]$ showmount -e 192.168.184.148
Export list for 192.168.184.148:
/nfs *

~]# mkdir /backup
~]# mount 192.168.184.148:/nfs /backup

~]# df -hT | grep nfs
192.168.184.148:/nfs        nfs4       47G  6.1G   41G  13% /backup

# showmount -e 192.168.3.58
export list for 192.168.3.58:
/nfs *

# mkdir /exp

# mount 192.168.3.58:/nfs /exp
mount: 1831-008 giving up on:
192.168.3.58:/nfs
vmount: Operation not permitted.

# nfso -a | grep nfs_use_reserved_ports
         nfs_use_reserved_ports = 0

# nfso -o nfs_use_reserved_ports=1
Setting nfs_use_reserved_ports to 1

# nfso -a | grep nfs_use_reserved_ports
         nfs_use_reserved_ports = 1

# mount -v nfs -o rw,bg,hard,rsize=32768,wsize=32768,vers=3,nointr,timeo=600,proto=tcp 192.168.3.58:/nfs /exp

# df -g
Filesystem    GB blocks      Free %Used    Iused %Iused Mounted on
/dev/hd4           0.09      0.06   39%     2145    14% /
/dev/hd2           1.94      0.28   86%    30455    31% /usr
/dev/hd9var        0.19      0.15   18%      615     2% /var
/dev/hd3           0.09      0.09    2%       23     1% /tmp
/dev/hd1           0.03      0.03    2%        7     1% /home
/dev/hd11admin      0.12      0.12    1%        5     1% /admin
/proc                 -         -    -        -      - /proc
/dev/hd10opt       0.09      0.01   92%      474    20% /opt
/dev/livedump      0.25      0.25    1%        4     1% /var/adm/ras/livedump
192.168.3.58:/nfs      43.37     30.13   31%   134553     3% /exp

/etc/exports - NFS server export table

A line for an exported file system has the following structure:

<export> <host1>(<options>)

There should be no space between "host" and "(option)", otherwise there will be permission issues. Like touch: cannot touch ‘1’: Read-only file system