执行docker exec 命令进入容器后，如需要在容器内进行部分命令执行，发现无法执行，需要安装相关命令。

apt-get update

apt-get install -y vim

root@a1ada8c9eb8d:/# vim aa
bash: vim: command not found
root@a1ada8c9eb8d:/# 
root@a1ada8c9eb8d:/# apt-get update
Hit:1 http://deb.debian.org/debian bullseye InRelease
Hit:2 http://deb.debian.org/debian bullseye-updates InRelease
Hit:3 http://security.debian.org/debian-security bullseye-security InRelease
Reading package lists... Done
root@a1ada8c9eb8d:/# 
root@a1ada8c9eb8d:/# apt-get install vim
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following additional packages will be installed:
  libgpm2 vim-common vim-runtime xxd
Suggested packages:
  gpm ctags vim-doc vim-scripts
The following NEW packages will be installed:
  libgpm2 vim vim-common vim-runtime xxd
0 upgraded, 5 newly installed, 0 to remove and 0 not upgraded.
Need to get 8174 kB of archives.
After this operation, 36.9 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://deb.debian.org/debian bullseye/main amd64 xxd amd64 2:8.2.2434-3+deb11u1 [192 kB]
Get:2 http://deb.debian.org/debian bullseye/main amd64 vim-common all 2:8.2.2434-3+deb11u1 [226 kB]
Get:3 http://deb.debian.org/debian bullseye/main amd64 libgpm2 amd64 1.20.7-8 [35.6 kB]
Get:4 http://deb.debian.org/debian bullseye/main amd64 vim-runtime all 2:8.2.2434-3+deb11u1 [6226 kB]
Get:5 http://deb.debian.org/debian bullseye/main amd64 vim amd64 2:8.2.2434-3+deb11u1 [1494 kB]                                                                                                                                                   
Fetched 8174 kB in 3min 29s (39.0 kB/s)                                                                                                                                                                                                           
debconf: delaying package configuration, since apt-utils is not installed
Selecting previously unselected package xxd.
(Reading database ... 7815 files and directories currently installed.)……