Gentoo Wiki:Sandbox

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The variable names of the following kernel options are made up.

KERNEL

General setup  --->
    -*- Namespaces support Search for <code>CONFIG_NS</code> to find this item. More information about searching can be found in the kernel configuration article. --->
        [*]  User namespace Search for <code>CONFIG_NS_USER</code> to find this item. More information about searching can be found in the kernel configuration article.
File systems  --->
    <*> FUSE (Filesystem in Userspace) support Search for <code>CONFIG_FUSE</code> to find this item. More information about searching can be found in the kernel configuration article.
    <*> Overlay filesystem support Search for <code>CONFIG_ OVERLAYFS</code> to find this item. More information about searching can be found in the kernel configuration article.
Device Drivers --->
    -*- Network device support Search for <code>CONFIG_NET</code> to find this item. More information about searching can be found in the kernel configuration article. --->
        -*- Network core driver support Search for <code>CONFIG_NET_CORE</code> to find this item. More information about searching can be found in the kernel configuration article. --->
            <*/M> Universal TUN/TAP device driver support Search for <code>CONFIG_TAP</code> to find this item. More information about searching can be found in the kernel configuration article.

KERNEL

General setup  --->
    -*- Namespaces support  --->
        CONFIG_NS
        [*]  User namespace
             CONFIG_NS_USER
File systems  --->
    <*> FUSE (Filesystem in Userspace) support
        CONFIG_FUSE
    <*> Overlay filesystem support
        CONFIG_OVERLAYFS
Device Drivers --->
    -*- Network device support --->
        CONFIG_NET
        -*- Network core driver support --->
            CONFIG_NET_CORE
            <*/M> Universal TUN/TAP device driver support
                  CONFIG_TAP

KERNEL

General setup  --->
    -*- Namespaces support NS --->
        [*]  User namespace NS_USER
File systems  --->
    <*> FUSE (Filesystem in Userspace) support FUSE
    <*> Overlay filesystem support OVERLAYFS
Device Drivers --->
    -*- Network device support NET --->
        -*- Network core driver support NET_CORE --->
            <*/M> Universal TUN/TAP device driver support TAP

Probably not mobile-friendly:

KERNEL

General setup  --->
    -*- Namespaces support --->
        [*]  User namespace
File systems  --->
    <*> FUSE (Filesystem in Userspace) support
    <*> Overlay filesystem support
Device Drivers --->
    -*- Network device support --->
        -*- Network core driver support --->
            <*/M> Universal TUN/TAP device driver support