Minimal root filesystem
Now that all the information relating to the root
filesystem has been presented to you, it would be good exercise to describe the must-have components of the minimal root
filesystem. This would not only help you to understand the rootfs
structure and its dependencies better, but also help with requirements needed for boot time and the size optimization of the root
filesystem.
The starting point to describe the components is /sbin/init
; here, by using the ldd
command, the runtime dependencies can be found. For the Yocto Project, the ldd /sbin/init
command returns:
linux-gate.so.1 (0xb7785000) libc.so.6 => /lib/libc.so.6 (0x4273b000) /lib/ld-linux.so.2 (0x42716000)
From this information, the /lib
directory structure is defined. ...
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