在 ubuntu20.04 中装 ns-allinone-2.35，参考以下链接： https://blog.csdn.net/qq_43715228/article/details/85057295。 在参考上述链接过程中会遇到一些问题， (1) 运行 apt 报错，则:ps aux|grep apt Kill -9 PID,如图: (2)gcc 版本过高，需要降低版本，安装 gcc 过程参考如下: http://blog.sina.com.cn/s/blog_6cee149d010129bl.html 我安装的是 4.8 版本 但是有可能会提示:Package 'g++-4.8' has no installation candidate， 解决办法如下:修改源，修改后的 sources.list 内容如下: deb http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe 

multiverse deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse (3)在参考的第一个连接中，装完 nam 时，会出现: Can't find a usable tk.tcl in the following directories:……………………… nam: Can't find a usable tk.tcl in the following directories: /home/huangfengi/Desktop/myfile/ ns-allinone-2.35…… 解决办法如下: 添加红线部分，注意:自己的用户目录和 ns-allinone-2.35 的目录不要写错。