红帽8的dnf注意事项

botang

1. 由于在默认的发行版本中，有50个软件的分支选择，所以在安装软件的时候建议先执行：

1. [root@classroom conf]#dnf module list
   
2. Updating Subscription Management repositories.
   
3. Unable to read consumer identity
   
4. This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
   
5. Last metadata expiration check: 0:08:25 ago on Tue 10 Nov 2020 04:41:06 AM CST.
   
6. AppStream
   
7. Name Stream Profiles Summary
   
8. 389-ds 1.4 [e] 389 Directory Server (base)
   
9. ant 1.10 [d][e] common [d] Java build tool
   
10. container-tools 1.0 common [d] Common tools and dependencies for container runtimes
    
11. container-tools rhel8 [d][e] common [d] Common tools and dependencies for container runtimes
    
12. freeradius 3.0 [d] server [d] High-performance and highly configurable free RADIUS server
    
13. gimp 2.8 [d][e] common [d], devel gimp module
    
14. go-toolset rhel8 [d] common [d] Go
    
15. httpd 2.4 [d][e] common [d] [i], devel, minimal Apache HTTP Server
    
16. idm DL1 [e] common [d], adtrust, client, dns [i], server The Red Hat Enterprise Linux Identity Management system module
    
17. idm client [d] common [d] RHEL IdM long term support client module
    
18. inkscape 0.92.3 [d] common [d] Vector-based drawing program using SVG
    
19. javapackages-runtime 201801 [d][e] common [d] Basic runtime utilities to support Java applications
    
20. libselinux-python 2.8 common Python 2 bindings for libselinux
    
21. llvm-toolset rhel8 [d][e] common [d] LLVM
    
22. mailman 2.1 [d] common [d] Electronic mail discussion and e-newsletter lists managing software
    
23. mariadb 10.3 [d][e] client, server [d], galera MariaDB Module
    
24. maven 3.5 [d][e] common [d] Java project management and project comprehension tool
    
25. mercurial 4.8 [d] common [d] Mercurial -- a distributed SCM
    
26. mod_auth_openidc 2.3 Apache module suporting OpenID Connect authentication
    
27. mysql 8.0 [d] client, server [d] MySQL Module
    
28. nginx 1.14 [d] common [d] nginx webserver
    
29. nodejs 10 [d] common [d], development, minimal, s2i Javascript runtime
    
30. parfait 0.5 common Parfait Module
    
31. perl 5.24 common [d], minimal Practical Extraction and Report Language
    
32. perl 5.26 [d][e] common [d] [i], minimal Practical Extraction and Report Language
    
33. perl-App-cpanminus 1.7044 [d][e] common [d] Get, unpack, build and install CPAN modules
    
34. perl-DBD-MySQL 4.046 [d][e] common [d] A MySQL interface for Perl
    
35. perl-DBD-Pg 3.7 [d][e] common [d] A PostgreSQL interface for Perl
    
36. perl-DBD-SQLite 1.58 [d][e] common [d] SQLite DBI driver
    
37. perl-DBI 1.641 [d][e] common [d] A database access API for Perl
    
38. perl-FCGI 0.78 [d][e] common [d] FastCGI Perl bindings
    
39. perl-YAML 1.24 [d][e] common [d] Perl parser for YAML
    
40. php 7.2 [d] common [d], devel, minimal PHP scripting language
    
41. pki-core 10.6 [e] PKI Core
    
42. pki-deps 10.6 [e] PKI Dependencies
    
43. postgresql 10 [d][e] client, server [d] PostgreSQL server and client module
    
44. postgresql 9.6 client, server [d] PostgreSQL server and client module
    
45. python27 2.7 [d][e] common [d] Python programming language, version 2.7
    
46. python36 3.6 [d][e] common [d], build Python programming language, version 3.6
    
47. redis 5 [d] common [d] Redis persistent key-value database
    
48. rhn-tools 1.0 [d] common [d] Red Hat Satellite 5 tools for RHEL
    
49. ruby 2.5 [d] common [d] An interpreter of object-oriented scripting language
    
50. rust-toolset rhel8 [d] common [d] Rust
    
51. satellite-5-client 1.0 [d][e] common [d], gui Red Hat Satellite 5 client packages
    
52. scala 2.10 [d] common [d] A hybrid functional/object-oriented language for the JVM
    
53. squid 4 [d][e] common [d] Squid - Optimising Web Delivery
    
54. subversion 1.10 [d][e] common [d], server Apache Subversion
    
55. swig 3.0 [d][e] common [d], complete Connects C/C++/Objective C to some high-level programming languages
    
56. varnish 6 [d] common [d] Varnish HTTP cache
    
57. virt rhel [d][e] common [d] Virtualization module
    
58. 
    
59. Hint: [d]efault, [e]nabled, [x]disabled, [i]nstalled
    
60. [root@classroom conf]# dnf module list | wc -l
    
61. 58
    
62. [root@classroom conf]#

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2. 真正是有选择余地的是：

1. [root@classroom conf]# dnf module list | cut -d ' ' -f 1 | tail -n +7 | uniq -c | grep '\<2\>
   
2.       2 container-tools
   
3.       2 idm
   
4.       2 perl
   
5.       2 postgresql
   

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3.  如果卸载过module中的流分支，它仍然会处于enable状态。务必要：

1. dnf module reset perl

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