Running sudo apt-get install jenkins reports that several software packages cannot be downloaded. How about running apt-get update or adding --fix - missing option to try again? - Programmer Sought
![How to fix Missing GPG Key Apt Repository Errors (NO_PUBKEY) on Ubuntu, Mint and Debian | EtutorialCenter How to fix Missing GPG Key Apt Repository Errors (NO_PUBKEY) on Ubuntu, Mint and Debian | EtutorialCenter](https://www.etutorialcenter.com/sites/default/files/error-gpg-key-no-pubkey.png)
How to fix Missing GPG Key Apt Repository Errors (NO_PUBKEY) on Ubuntu, Mint and Debian | EtutorialCenter
![downloads - I am not able to install GCC in my Ubuntu(18.04)...I already tried the command - sudo apt install gcc - Ask Ubuntu downloads - I am not able to install GCC in my Ubuntu(18.04)...I already tried the command - sudo apt install gcc - Ask Ubuntu](https://i.stack.imgur.com/4E63D.jpg)
downloads - I am not able to install GCC in my Ubuntu(18.04)...I already tried the command - sudo apt install gcc - Ask Ubuntu
![software installation - When i try to install curl, I write sudo apt install curl, the process gets completed, but when I write curl, it shows that curl is not installed - software installation - When i try to install curl, I write sudo apt install curl, the process gets completed, but when I write curl, it shows that curl is not installed -](https://i.stack.imgur.com/0prJ3.png)
software installation - When i try to install curl, I write sudo apt install curl, the process gets completed, but when I write curl, it shows that curl is not installed -
![Ubuntu16.04下E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?_水冰老师的博客-CSDN博客 Ubuntu16.04下E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?_水冰老师的博客-CSDN博客](https://img-blog.csdnimg.cn/20200122231247256.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3psYW5uZ2Fv,size_16,color_FFFFFF,t_70)
Ubuntu16.04下E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?_水冰老师的博客-CSDN博客
![E: Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/s/sane-backends/libsane_1.0.25+git20150528-1ubuntu2.16.04.1_amd64.deb Hash Sum mismatch E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing? Failed to ... E: Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/s/sane-backends/libsane_1.0.25+git20150528-1ubuntu2.16.04.1_amd64.deb Hash Sum mismatch E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing? Failed to ...](https://user-images.githubusercontent.com/37743555/37873455-ddf65382-304f-11e8-9ef3-de54a343e897.png)