Linux basic commands--Learning Records

1, mkdir-p recursive create directory (-p parameter for recursive creation);

2, touch create file;

3. Cat View

5, VI Editor

6. Echo > (direct overlay) or << (append later) line append

Cat appends multiple lines of content

7. Cp-ap Copy Directory

8, MV Mobile

9. grep pipe (exclude)

10, head-2 file name display the first few lines

11, sed (important. Linux Three Musketeers)

12. Awk (important. Linux musketeers, need to be summarized separately)

13. Alias aliases

14. Seq Generate command (seq 100>ett.txt like ett.txt file append 1--100 number)

15. Head and tail opposite

16. Sed

17. redirect

18. Echo Command append content to file

19. Find (delete 7 days ago file)

20. Ifup + network card: Start Network card command

21. Setup (SET command)

22. Uname-r (view Linux kernel version)

23. diff Vimdiff (Linux comparison tool)

24. Optimization

Create a user name and password

Yum installation source changed to domestic

Modify the default port to prevent hacker intrusion

RPM to see if the installation

25. SELinux Closed

26, NTSYSV or Setup to set up the interface, cancel the boot service or chkconfig--list |grep 3:on

27. Visudo (The root user performs the assigned permissions)

Sudo-l Query Permissions

28, which can command the location (such as query which Useradd)

29. Echo $PATH command The road to be put here

30.

31. Modify the default user and port

32. Modify the system character set

33. Synchronization system Time

34, build their own time server (Crontab-l to perform timing synchronization time)

35. Add File Descriptor

36.

37, adjust the kernel parameter file (need to know sysctl.conf parameter meaning)

Linux basic commands--Learning Records