NFS монтируется только как RO

# cat /etc/exports 
# /etc/exports: the access control list for filesystems which may be exported
#		to NFS clients.  See exports(5).
#
# Example for NFSv2 and NFSv3:
# /srv/homes       hostname1(rw,sync,no_subtree_check) hostname2(ro,sync,no_subtree_check)
#
# Example for NFSv4:
# /srv/nfs4        gss/krb5i(rw,sync,fsid=0,crossmnt,no_subtree_check)
# /srv/nfs4/homes  gss/krb5i(rw,sync,no_subtree_check)
#
/home/red-btr		192.168.1.0/24(rw)
/home/red-ext4		192.168.1.0/24(rw)

# exportfs -v
/home/red-btr 	192.168.1.0/24(rw,wdelay,root_squash,no_subtree_check,sec=sys,rw,root_squash,no_all_squash)
/home/red-ext4	192.168.1.0/24(rw,wdelay,root_squash,no_subtree_check,sec=sys,rw,root_squash,no_all_squash)

192.168.1.2:/home/red-btr on /home/red-alpha type nfs4 (rw,relatime,vers=4.0,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,port=0,timeo=600,retrans=2,sec=sys,clientaddr=192.168.1.1,local_lock=none,addr=192.168.1.2)
192.168.1.2:/home/red-ext4 on /home/red-beta type nfs4 (rw,relatime,vers=4.0,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,port=0,timeo=600,retrans=2,sec=sys,clientaddr=192.168.1.1,local_lock=none,addr=192.168.1.2)

192.168.1.2:/home/red-btr	/home/red-alpha	nfs4	noauto,rw	0	0
192.168.1.2:/home/red-ext4	/home/red-beta	nfs4	noauto,rw	0	0

/dev/sdb2 on /home/red-ext4 type ext4 (rw,relatime,errors=remount-ro,data=ordered)
/dev/sdb1 on /home/red-btr type btrfs (rw,relatime,space_cache)

# touch /home/red-beta/q
touch: cannot touch ‘/home/red-beta/q’: Permission denied