Linux boot sequence

Boot Sequence
1. bootloader
2. linux kernel
3. inittab
4. rc script (differs depending on which linux distribution )
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1) /etc/passwd
2) /etc/shadow
3) /etc/group

4) /etc/profile
5) /etc/profile.d/*.sh

6) ~/.bash_profile
7) ~/.bashrc
8) /etc/bashrc

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Graphical Environment:
/etc/X11/xinit/xinitrc.d/