系统版本 Ubuntu 24.04
每次 apt update 都会带出一大堆提示升级但需要 ubuntu pro 才能升级的提示，比如：
Get more security updates through Ubuntu Pro with 'esm-apps' enabled:
vlc-plugin-qt libvlc5 libzvbi-common vlc-data libvlccore9 vlc vlc-bin
vlc-l10n libcjson1 libavdevice60 ffmpeg libpostproc57 vlc-plugin-samba
libavcodec60 libzvbi0t64 vlc-plugin-notify libavutil58 libswscale7
vlc-plugin-access-extra vlc-plugin-skins2 vlc-plugin-video-splitter
libswresample4 vlc-plugin-video-output libavformat60 v2ray libvlc-bin
vlc-plugin-base vlc-plugin-visualization libavfilter9
Learn more about Ubuntu Pro at https://ubuntu.com/pro看着乱不说，心理还不爽，vlc 插件居然要 pro 才能升级？关了关了。
终端下打开文件夹：
cd /var/lib/ubuntu-advantage/apt-esm/etc/apt/sources.list.d
ls编辑文件夹下的 ubuntu-esm-apps.sources 文件。
sudo vi ubuntu-esm-apps.sources将文件里面所有行都用 # 注释掉，最后结果：
# Written by ubuntu-pro-client
# Types: deb
# URIs: https://esm.ubuntu.com/apps/ubuntu
# Suites: noble-apps-security noble-apps-updates
# Components: main
# Signed-By: /usr/share/keyrings/ubuntu-pro-esm-apps.gpg再次执行 apt update apt upgrade 就不会出现 Ubuntu pro 才能更新的提示了。
