问题:
python --version
的结果:
Command 'python' not found, but can be installed with:
sudo apt install python3
sudo apt install python
sudo apt install python-minimal
You also have python3 installed, you can run 'python3' instead.
cat /etc/apt/sources.list
的结果:
# deb cdrom:[Ubuntu 18.04.1 LTS _Bionic Beaver_ - Release amd64 (20180725)]/ bionic main restricted
# See http://help.ubuntu.com/community http://packages.ros.org/ros/ubuntu/y/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb [trusted=yes] http://br.archive.ubuntu.com/ubuntu/ bionic restricted main
# deb-src http://br.archive.ubuntu.com/ubuntu/ bionic main restricted
## Major bug fix updates produced after the final release of the
## distribution.
# deb-src http://br.archive.ubuntu.com/ubuntu/ bionic-updates main restricted
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://br.archive.ubuntu.com/ubuntu/ bionic universe
# deb-src http://br.archive.ubuntu.com/ubuntu/ bionic universe
# deb-src http://br.archive.ubuntu.com/ubuntu/ bionic-updates universe
## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://br.archive.ubuntu.com/ubuntu/ bionic multiverse
# deb-src http://br.archive.ubuntu.com/ubuntu/ bionic multiverse
# deb-src http://br.archive.ubuntu.com/ubuntu/ bionic-updates multiverse
## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://br.archive.ubuntu.com/ubuntu/ bionic-backports restricted universe multiverse main
# deb-src http://br.archive.ubuntu.com/ubuntu/ bionic-backports main restricted universe multiverse
## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
# deb http://archive.canonical.com/ubuntu bionic partner
# deb-src http://archive.canonical.com/ubuntu bionic partner
deb http://security.ubuntu.com/ubuntu bionic-security restricted main
# deb-src http://security.ubuntu.com/ubuntu bionic-security main restricted
deb http://security.ubuntu.com/ubuntu bionic-security universe
# deb-src http://security.ubuntu.com/ubuntu bionic-security universe
deb http://security.ubuntu.com/ubuntu bionic-security multiverse
deb http://archive.canonical.com/ bionic partner
# deb-src http://archive.canonical.com/ bionic partner
# deb-src http://security.ubuntu.com/ubuntu bionic-security multiverse
deb http://br.archive.ubuntu.com/ubuntu/ bionic-updates main multiverse universe restricted
deb http://my-private-server.test bionic main
# deb-src http://my-private-server.test bionic main
sudo apt update
的结果:
E: Conflicting values set for option Trusted regarding source http://br.archive.ubuntu.com/ubuntu/ bionic
E: The list of sources cannot be read.
/etc/apt/sources.list
的结果:
bash: /etc/apt/sources.list: Permission denied
答案1:
此行中有[trusted=yes]
作为选项:
deb [trusted=yes] http://br.archive.ubuntu.com/ubuntu/ bionic restricted main
要修复,请将该选项添加到有相同URL的行,或者简单地运行下面命令删除:
sudo sed -i '/bionic restricted main$/s/^deb [trusted=yes]/deb/' /etc/apt/sources.list
答案2:
你已经安装了python3,并且没有必要将python2.x与python3.x一起安装,因为python2.7在2020年1月1日结束了它的生命,使用命令python3
启动Python3.x解释器,命令python
启动Python2.x解释器。
移除 E: Conflicting values set for option Trusted regarding source http://br.archive.ubuntu.com/ubuntu/ bionic
第5行第/etc/apt/sources.list
行中的错误项应为:
deb [arch=amd64 trusted=yes] http://br.archive.ubuntu.com/ubuntu/ bionic main restricted
其中斜体文本是可选的。
deb http://br.archive.ubuntu.com/ubuntu/ bionic main restricted
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