我曾尝试安装一个名为 i-nex(CPU 温度监控工具)的应用程序,但由于找不到软件包而无法安装。然而,它在系统上留下了一些痕迹。现在,当我尝试更新 apt 时,出现以下错误。我该如何摆脱它?
E: Failed to fetch http://ppa.launchpad.net/i-nex-development-team/daily/ubuntu/dists/zesty/InRelease 403 Forbidden [IP: 91.189.95.85 80]
E: The repository 'http://ppa.launchpad.net/i-nex-development-team/daily/ubuntu zesty InRelease' is not signed.