我的系统是Ubuntu，在激活远程虚拟环境后使用pip在该环境下下载包，运行代码发现找不到对应的包。
经过反复卸载下载包，我发现包下载的地址并不是我设置的~/.conda/pkgs，而是在~/.local/的python中，这很奇怪，因为按道理来说应该使用的是虚拟环境下的python和pip。我运行which pip，得到的是~/.local/bin/pip。运行echo $PATH，得到的结果是~/.local/bin:~/.conda/envs/cyc_p2p/bin:/usr/local/anaconda3/condabin:/usr/local/cuda-11.8/bin:/usr/local/anaconda3/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin。简单地说就是系统自动将~/.local/bin/目录设置为了PATH的首选路径（而不是该环境的bin目录）。
我排查了~/.bashrc和~/.condarc，实在没发现什么问题，最后我在~/.profile中发现了

# ~/.profile: executed by the command interpreter for login shells.
# This file is not read by bash(1), if ~/.bash_profile or ~/.bash_login
# exists.
# see /usr/share/doc/bash/examples/startup-files for examples.
# the files are located in the bash-doc package.

# the default umask is set in /etc/profile; for setting the umask
# for ssh logins, install and configure the libpam-umask package.
#umask 022

# if running bash
if [ -n "$BASH_VERSION" ]; then
    # include .bashrc if it exists
    if [ -f "$HOME/.bashrc" ]; then
	. "$HOME/.bashrc"
    fi
fi

# set PATH so it includes user's private bin if it exists
if [ -d "$HOME/bin" ] ; then
    PATH="$HOME/bin:$PATH"
fi

# set PATH so it includes user's private bin if it exists
if [ -d "$HOME/.local/bin" ] ; then
    PATH="$HOME/.local/bin:$PATH"
fi

只有这里出现了PATH="$HOME/.local/bin:$PATH"这样的语句，可以看到它在. "$HOME/.bashrc"的后面，也就是会在运行~/.bashrc后再将~/.local/bin/添加到PATH的开头。不管怎么说，还是有简单粗暴的解法，就是将PATH="$HOME/.local/bin:$PATH"和. "$HOME/.bashrc"位置换一下：

# ~/.profile: executed by the command interpreter for login shells.
# This file is not read by bash(1), if ~/.bash_profile or ~/.bash_login
# exists.
# see /usr/share/doc/bash/examples/startup-files for examples.
# the files are located in the bash-doc package.

# the default umask is set in /etc/profile; for setting the umask
# for ssh logins, install and configure the libpam-umask package.
#umask 022

# set PATH so it includes user's private bin if it exists
if [ -d "$HOME/bin" ] ; then
    PATH="$HOME/bin:$PATH"
fi



# set PATH so it includes user's private bin if it exists
if [ -d "$HOME/.local/bin" ] ; then
    PATH="$HOME/.local/bin:$PATH"
fi


# if running bash
if [ -n "$BASH_VERSION" ]; then
    # include .bashrc if it exists
    if [ -f "$HOME/.bashrc" ]; then
	. "$HOME/.bashrc"
    fi
fi

但问题是这个问题是突然出现的，而我之前肯定是没有修改过~/.profile文件，所以非常奇怪，我个人认为应该有一些其他原因，求大佬解惑。

后来用vscode连远程时又出现了这个问题，这个是因为之前"~/.vscode-server/"目录下的vscode配置文件没有随着~/.profile一起改变。这个可以根据vscode的bash窗口发现其配置文件位置：

这种东西显然不必手动去改，最简单粗暴的做法是直接把"~/.vscode-server/"整个删掉，然后重新vscode连接服务器，万能的vscode会帮你重新配置的。