Linux File Hierarchy Partition

On the linux you will facing with the filesystem hierarchy. which is usualy we don't care about this when we install the linux machine. because usually we are put it all together into single root partition.
Here what is FHS that I mean :
Root partition "/"
The root filesystem holds the files essential to the operation of the system. It must contain the following directories or symbolic links: bin, boot, dev, etc, lib, media, mnt, opt, sbin, srv, tmp, usr, and var.
suggested size : 500MiB-50GiB+ Depends on what is mounted separately

/boot
The /boot directory contains the Linux kernel and the boot loader files.
Sugested size : 500MiB-2GB

/home
The /home directory is where user home directories are normally created.
Sugested size : 500MiB+ per user

/tmp
The /tmp directory is used to create temporary files for the system and users. If this directory is too small, it may prevent applications from functioning correctly.
Sugested size : Minimum of 5 GB + or 500MiB+ per user actively logged in

/opt
The /opt directory is where third-party software is often installed. Some examples include Google Chrome and Google Earth.
Sugested size : 100MiB+ or Depends on how many packages are installed

swap
Swap is virtual memory that is not mounted on a directory. This virtual memory is used when the actual memory of the system is low. On systems with large amounts of memory, swap is less important.
Sugested size : Up to 2 times the physical memory of the system

/usr
The /usr directory contains the bulk of the operating system's files, including most of the commands and system software.
Sugested size : 2GiB-10GiB+

/usr/local
This directory is used for locally installed software that should not be upgraded or updated with the operating system.
Sugested size : 100MiB+ or Size depends on local needs

/var
There are many directories that may have heavy activity under /var for services like mail, ftp, http, and printing.
Sugested size : 100MiB+ Depending on the volume of activity

/boot/efi
The /boot/efi directory contains the Linux kernel and the boot loader files. It is typically set up automatically by the installer.
Sugested size : 100MB-250MB

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