如何解决 add-apt-repository: not found 错误 Posted on 2020-08-01 Word count in article: 204 Reading time ≈ 1 mins. Ubuntu 下执行 add-apt-repository 添加第三方仓库时遇到 add-apt-repository: not found 错误,执行以下命令即可: 12sudo apt-get updatesudo apt-get install software-properties-common 参考: How To Fix ‘Add-Apt-Repository Command Not Found’ On Ubuntu & Debian