Basic knowledge of Linux learning

2. Android =linux kernel+busy Box+jvm+java app

4. iOS system =unix

6. #: Super User Root at command prompt

8. $ normal User

10. The program consists of four files: binaries, header/library files, Help files, configuration files

12. The format of the command is empty Geyou can not limit the number

14. Requirement: The body of the action you want to perform

16. Internal command: Commands built into the shell

18. External command: Commands obtained by installing the application.

20. Options: Features used during the execution of this command

22. The method of obtaining Help, Info command, some program comes with the Help document, program related website Document information, program issuer official site, search engine Google

24. File system 1, file name cannot contain/character. /represents the root file system, which represents the path delimiter, and file names require strict case sensitivity

26. Relative path

28. HFS Hierarchy Standard

30. Bin: normal operation performed by ordinary users

32. Boot: A static file that boots the operating system

34. Kernel: Initvamfs

36. Device devices

38. Block devices: Devices that enable data storage

40. ETC: Storage System configuration file dedicated to the host

42. LIB: For shared library files

44. MNT temporary file system hangs at point

46. Sbin: The administrative command that the root can execute

48. SRV: Store various server data provided by the system

50. Temperate: A second root

52. Usr:linux System Main install third-party program when file directory

54. VAR: variable-session data

56. File type based on color, identified by identity

58. B Block device C: Character device D: directory file l Symbolic link file P: Pipeline file
    

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Basic knowledge of Linux learning