Ubuntu(Linux)卸载指定版本的postgres

查看所有相关的包

dpkg -l | grep postgres

rc pgdg-keyring 2018.2 all keyring for apt.postgresql.org
ii postgresql 13+223 all object-relational SQL database (supported version)
ii postgresql-11 11.5-3sid2 amd64 object-relational SQL database, version 11 server
ii postgresql-13 13.1-1+b1 amd64 object-relational SQL database, version 13 server
ii postgresql-9.6 9.6.13-0+deb9u1 amd64 object-relational SQL database, version 9.6 server
ii postgresql-client-11 11.5-3sid2 amd64 front-end programs for PostgreSQL 11
ii postgresql-client-12 12.0-1+b1 amd64 front-end programs for PostgreSQL 12
ii postgresql-client-13 13.1-1+b1 amd64 front-end programs for PostgreSQL 13
ii postgresql-client-9.6 9.6.15-1.pgdg80+1 amd64 front-end programs for PostgreSQL 9.6
ii postgresql-client-common 209 all manager for multiple PostgreSQL client versions
ii postgresql-common 209 all PostgreSQL database-cluster manager
ii postgresql-contrib 13+223 all additional facilities for PostgreSQL (supported version)
ii postgresql-contrib-9.6 9.6.13-0+deb9u1 amd64 additional facilities for PostgreSQL

移除相关包

# 指定你想要移除的
sudo apt-get --purge remove postgresql-13 postgresql-client-13 postgresql-client-12

如果你彻底删除了所有postgres 相关内容，那么移除下列文件夹(可选)

sudo rm -rf /var/lib/postgresql/
sudo rm -rf /var/log/postgresql/
sudo rm -rf /etc/postgresql/

移除postgres用户 (可选)

sudo deluser postgres