ubuntu apt-get报错

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1. W: GPG 错误：https://download.docker.com/linux/ubuntu xenial InRelease: 由于没有公钥，无法验证下列签名： NO_PUBKEY 7EA0A9C3F273FCD8
   
2. W: 仓库 “https://download.docker.com/linux/ubuntu xenial InRelease” 没有数字签名。
   
3. N: 无法认证来自该源的数据，所以使用它会带来潜在风险。
   
4. N: 参见 apt-secure(8) 手册以了解仓库创建和用户配置方面的细节。
   
5. root@ubuntu:/docker# apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 7EA0A9C3F273FCD8
   
6. 
   
7. Executing: /tmp/tmp.9KFPG4E1LI/gpg.1.sh --keyserver
   
8. keyserver.ubuntu.com
   
9. --recv-keys
   
10. 7EA0A9C3F273FCD8
    
11. gpg: requesting key F273FCD8 from hkp server keyserver.ubuntu.com
    
12. gpg: key 0EBFCD88: public key "Docker Release (CE deb) " imported
    
13. gpg: Total number processed: 1
    
14. gpg: imported: 1 (RSA: 1)
15. root@ubuntu:/docker# apt-get clean
16. root@ubuntu:/docker# apt-get update
    

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1. ubuntu /boot空间不足解决办法
2. root@ubuntu:/home/ubuntu# df -hl
   
3. /dev/sda1                    472M  432M   17M  97% /boot
   
4. root@ubuntu:/home/ubuntu# dpkg --get-selections|grep linux
   
5. console-setup-linux                install
   
6. libselinux1:amd64                install
   
7. linux-base                    install
   
8. linux-firmware                    install
   
9. linux-generic                    install
   
10. linux-headers-4.4.0-31                install
    
11. linux-headers-4.4.0-31-generic            install
    
12. linux-headers-4.4.0-78                install
    
13. linux-headers-4.4.0-78-generic            install
    
14. linux-headers-4.4.0-79                install
    
15. linux-headers-4.4.0-79-generic            install
    
16. linux-headers-4.4.0-81                install
    
17. linux-headers-4.4.0-81-generic            install
    
18. linux-headers-4.4.0-83                install
    
19. linux-headers-4.4.0-83-generic            install
    
20. linux-headers-4.4.0-87                install
    
21. linux-headers-4.4.0-87-generic            install
    
22. linux-headers-4.4.0-89                install
    
23. linux-headers-4.4.0-89-generic            install
    
24. linux-headers-4.4.0-96                install
    
25. linux-headers-4.4.0-96-generic            install
    
26. linux-headers-4.4.0-97                install
    
27. linux-headers-4.4.0-97-generic            install
    
28. linux-headers-4.4.0-98                install
    
29. linux-headers-4.4.0-98-generic            install
    
30. linux-headers-generic                install
    
31. linux-image-4.4.0-31-generic            deinstall
    
32. linux-image-4.4.0-78-generic            deinstall
    
33. linux-image-4.4.0-79-generic            install
    
34. linux-image-4.4.0-81-generic            install
    
35. linux-image-4.4.0-83-generic            install
    
36. linux-image-4.4.0-87-generic            install
    
37. linux-image-4.4.0-89-generic            install
    
38. linux-image-4.4.0-96-generic            install
    
39. linux-image-4.4.0-97-generic            install
    
40. linux-image-4.4.0-98-generic            install
    
41. linux-image-extra-4.4.0-31-generic        deinstall
    
42. linux-image-extra-4.4.0-78-generic        deinstall
    
43. linux-image-extra-4.4.0-79-generic        deinstall
    
44. linux-image-extra-4.4.0-81-generic        deinstall
    
45. linux-image-extra-4.4.0-83-generic        deinstall
    
46. linux-image-extra-4.4.0-87-generic        deinstall
    
47. linux-image-extra-4.4.0-89-generic        deinstall
    
48. linux-image-extra-4.4.0-96-generic        install
    
49. linux-image-extra-4.4.0-97-generic        install
    
50. linux-image-extra-4.4.0-98-generic        install
    
51. linux-image-extra-virtual            install
    
52. linux-image-generic                install
    
53. linux-libc-dev:amd64                install
    
54. util-linux                    install
    
55. #linux-后面带image的是旧的内核，可以删除，删除后显示deinstall。
    
56. root@ubuntu:/home/ubuntu# apt-get remove linux-image-extra-4.4.0-89-generic
57. root@ubuntu:/home/ubuntu# df -hl
58. /dev/sda1                    472M  282M  167M  63% /boot
    

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1. mdadm: /etc/mdadm/mdadm.conf defines no arrays.
   
2. root@ubuntu:/home/ubuntu# /usr/share/mdadm/mkconf > /etc/mdadm/mdadm.conf
   
3. root@ubuntu:/home/ubuntu# update-initramfs -u
   
4. root@ubuntu:/home/ubuntu# reboot

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1. E: Sub-process /usr/bin/dpkg returned an error code (1)
   
2. root@ubuntu:/home/ubuntu# sudo apt-get update --fix-missing
   
3. root@ubuntu:/home/ubuntu# sudo apt-get autoremove && sudo apt-get clean && sudo apt-get install -f
4. 或
5. root@ubuntu:/home/ubuntu# mv /var/lib/dpkg/info /var/lib/dpkg/info.bak
6. root@ubuntu:/home/ubuntu# mkdir /var/lib/dpkg/info
7. root@ubuntu:/home/ubuntu# apt-get update
8. root@ubuntu:/home/ubuntu# apt-get -f install pkg
9. root@ubuntu:/home/ubuntu# mv /var/lib/dpkg/info/* /var/lib/dpkg/info.bak
10. root@ubuntu:/home/ubuntu# rm -rf /var/lib/dpkg/info
    
11. root@ubuntu:/home/ubuntu# mv /var/lib/dpkg/info.bak /var/lib/dpkg/info