#系&#32479;以只&#35835;方式&#21551;&#21160; echo "root_rw_mount=NO" >> etc/rc.conf #建立&#32852;合目&#24405; mkdir union #添加需要&#35835;&#20889;的目&#24405; echo "var" > etc/union_dirs echo "etc" >> etc/union_dirs echo "root" >> etc/union_dirs #&#21551;&#21160;&#33050;本，添加到最前面 vi /etc/rc union_size = "$(($(sysctl -n hw.usermem)/4))b" union_device = $(mdconfig -a -t malloc -s ${union_size}) newfs /dev/${union_device} > /dev/null 2>&1 mount /dev/${union_device} /union while read union_dir ; do mkdir /union/${union_dir} mount_unionfs -o copymode=transparent /union/${union_dir} /${union_dir} done < /etc/union_dirs