官方文档地址：

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/storage_administration_guide/nfs-autofs#doc-wrapper

基本使用：

以在Centos7.9为例：

1.安装autofs

yum install -y autofs

2.主配置文件

cat /etc/auto.master
#
# Sample auto.master file
# This is a 'master' automounter map and it has the following format:
# mount-point [map-type[,format]:]map [options]
# For details of the format look at auto.master(5).
#
/misc    /etc/auto.misc
#
# NOTE: mounts done from a hosts map will be mounted with the
#    "nosuid" and "nodev" options unless the "suid" and "dev"
#    options are explicitly given.
#
/net    -hosts
#
# Include /etc/auto.master.d/*.autofs
# The included files must conform to the format of this file.
#
+dir:/etc/auto.master.d
#
# Include central master map if it can be found using
# nsswitch sources.
#
# Note that if there are entries for /net or /misc (as
# above) in the included master map any keys that are the
# same will not be seen as the first read key seen takes
# precedence.
#
+auto.master

3.基本使用方法：

3.1.使用相对路径时的语法：

/etc/auto.master格式：

挂载点的dirname 指定配置文件路径

指定配置文件格式

挂载点的basename 挂载选项 被挂载的位置

3.2.使用绝对路径的语法

/etc/auto.master格式：

/-   指定配置文件路径

指定配置文件格式

挂载点绝对路径 挂载选项 被挂载的位置

4.测试使用（使用nfs）

nfs地址：192.168.1.237
nfs配置文件内容：
/nfs/absolutely 192.168.1.*(rw,sync,all_squash)

/nfs/relative  192.168.1.*(rw,sync,all_squash)

4.1.使用相对路径

vim /etc/auto.master

# 在末尾加入
/nfs /etc/relative.misc

vim /etc/relative.misc

relative  -fstype=nfs,rw,sync,no_root_squash  192.168.1.237:/nfs/relative

重启autofs

systemctl restart autofs

4.2.使用绝对路径

mkdir /test/absolutely -p

vim /etc/master

/- /etc/absolutely.misc

vim /etc/absolutely.misc

/test/absolutely -fstype=nfs,rw,sync,no_root_squash 192.168.1.237:/nfs/absolutely

重启autofs

systemctl restart autofs