课程第1/2次

admin

2019-06-28
2019-07-07
安装语言包

1. [root@server3 ~]# yum langinstall zh_CN.utf-8
   
2. Loaded plugins: langpacks, product-id, search-disabled-repos, subscription-
   
3.               : manager
   
4. This system is not registered with an entitlement server. You can use subscription-manager to register.
   
5. --> Running transaction check
   
6. ---> Package man-pages-zh-CN.noarch 0:1.5.2-4.el7 will be installed
   
7. --> Finished Dependency Resolution
   
8. 
   
9. ================================================================================
   
10. Package                 Arch           Version              Repository    Size
    
11. ================================================================================
    
12. Installing:
    
13. man-pages-zh-CN         noarch         1.5.2-4.el7          base         2.3 M
    
14. 
    
15. Transaction Summary
    
16. ================================================================================
    
17. Install  1 Package
    
18. 
    
19. Total download size: 2.3 M
    
20. Installed size: 2.2 M
    
21. Is this ok [y/d/N]: y
    
22. Downloading packages:
    
23. man-pages-zh-CN-1.5.2-4.el7.noarch.rpm                     | 2.3 MB   00:00
    
24. Running transaction check
    
25. Running transaction test
    
26. Transaction test succeeded
    
27. Running transaction
    
28.   Installing : man-pages-zh-CN-1.5.2-4.el7.noarch                           1/1
    
29.   Verifying  : man-pages-zh-CN-1.5.2-4.el7.noarch                           1/1
    
30. 
    
31. Installed:
    
32.   man-pages-zh-CN.noarch 0:1.5.2-4.el7
    
33. 
    
34. Language packs installed for: zh_CN.utf-8
    
35. [root@server3 ~]# yum langlist
    
36. Loaded plugins: langpacks, product-id, search-disabled-repos, subscription-
    
37.               : manager
    
38. This system is not registered with an entitlement server. You can use subscription-manager to register.
    
39. Installed languages:
    
40.         Simplified Chinese (China)
    
41. 
    
42. [root@server3 ~]#
    

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一个简单的shell程序：

1. #!/bin/sh
   
2. 
   
3. A=$(date +%s%N)
   
4. 
   
5. sleep 10
   
6. 
   
7. B=$(date +%s%N)
   
8. 
   
9. C=$[ $B - $A ]
   
10. 
    
11. echo "It takes $C nano-seconds to run this shell script."
    

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