咸鱼

咸鱼是以盐腌渍后，晒干的鱼

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Ubuntu 删除PPA源

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添加一个PPA源

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$ sudo add-apt-repository ppa:user/ppa-name

PPA源失效

如mongodb的源失效，每次 apt update 都会有错误提示。

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root@bogon:~# apt-get update         
Ign:7 https://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.6 InRelease                    
Get:8 https://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.6 Release [3,457 B]
Get:9 https://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.6 Release.gpg [801 B]
Err:9 https://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.6 Release.gpg
  The following signatures were invalid: KEYEXPIRED 1544811256
Fetched 329 kB in 5s (60.8 kB/s)
Reading package lists... Done
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.6 Release: The following signatures were invalid: KEYEXPIRED 1544811256
W: Failed to fetch https://repo.mongodb.org/apt/ubuntu/dists/xenial/mongodb-org/3.6/Release.gpg  The following signatures were invalid: KEYEXPIRED 1544811256
W: Some index files failed to download. They have been ignored, or old ones used instead.

删除PPA源

进入 /etc/apt/sources.list.d/ 目录删除相关文件即可

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root@bogon:~# cd /etc/apt/sources.list.d/
root@bogon:/etc/apt/sources.list.d# ls
djcj-hybrid-trusty.list                               kirillshkrogalev-ffmpeg-next-trusty.list.save  mongodb-org-3.6.list.save              openjdk-r-ppa-trusty.list.save
djcj-hybrid-trusty.list.distUpgrade                   mongodb-org-3.4.list                           nginx-ubuntu-stable-xenial.list        rabbitmq.list
djcj-hybrid-trusty.list.save                          mongodb-org-3.4.list.distUpgrade               nginx-ubuntu-stable-xenial.list.save   rabbitmq.list.distUpgrade
kirillshkrogalev-ffmpeg-next-trusty.list              mongodb-org-3.4.list.save                      openjdk-r-ppa-trusty.list              rabbitmq.list.save
kirillshkrogalev-ffmpeg-next-trusty.list.distUpgrade  mongodb-org-3.6.list                           openjdk-r-ppa-trusty.list.distUpgrade
root@bogon:/etc/apt/sources.list.d# 
root@bogon:/etc/apt/sources.list.d# 
root@bogon:/etc/apt/sources.list.d# 
root@bogon:/etc/apt/sources.list.d# rm mongodb-org-3.*