Linux annex

Since FHS migrated away from being a Linux-only document and expanded to cover other operating systems, information specific to any one operating system was moved to an annex. The only annex listed in v2.3 of FHS is the Linux annex, which mentions a few guidelines and makes allowances for the placement of additional program files in /sbin. The Linux annex also mentions and supports the use of the /proc filesystem for the processing of kernel, memory, and process information.

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