1. Linux is strictly case-sensitive (commands, file naming, etc.)
2. All content in linux is saved in the form of files, including hardware
The hard disk file is /dev/sd[ap]
CD file is /dev/sr0
3. Linux does not rely on extensions to distinguish file types (there is no concept of extensions, it mainly depends on permissions, and extensions are required in linux, mainly for the convenience of users), the following are extensions of specific files:
Compressed package: *.gz *.bz2 *.tar.bz2 *.tgz
Binary package: *.php
Web file: *html *php
Script files: *.sh
Configuration file: *.conf
4. All storage devices in linux must be mounted before users can use them, including hard disks, U disks and CD-ROMs, similar to the sub-c, d, e, disks in Windows, etc.
5. Programs under Windows cannot be installed and run directly in Linux.