1 回滚

conda环境可以通过list命令查看当前conda环境有哪些版本，

conda list -h

可以看到使用方法：重点关注其中的-n和-r参数。

usage: conda list [-h] [-n ENVIRONMENT | -p PATH] [--json] [-v] [-q] [--show-channel-urls] [-c] [-f] [--explicit] [--md5] [-e] [-r] [--no-pip] [regex]

List linked packages in a conda environment.

Options:

positional arguments:
  regex                 List only packages matching this regular expression.

optional arguments:
  -h, --help            Show this help message and exit.
  --show-channel-urls   Show channel urls. Overrides the value given by `conda config --show show_channel_urls`.
  -c, --canonical       Output canonical names of packages only. Implies --no-pip.
  -f, --full-name       Only search for full names, i.e., ^<regex>$.
  --explicit            List explicitly all installed conda packaged with URL (output may be used by conda create --file).
  --md5                 Add MD5 hashsum when using --explicit
  -e, --export          Output requirement string only (output may be used by conda create --file).
  -r, --revisions       List the revision history and exit.
  --no-pip              Do not include pip-only installed packages.

Target Environment Specification:
  -n ENVIRONMENT, --name ENVIRONMENT
                        Name of environment.
  -p PATH, --prefix PATH
                        Full path to environment location (i.e. prefix).

Output, Prompt, and Flow Control Options:
  --json                Report all output as json. Suitable for using conda programmatically.
  -v, --verbose         Use once for info, twice for debug, three times for trace.
  -q, --quiet           Do not display progress bar.

Examples:

List all packages in the current environment:

    conda list

List all packages installed into the environment 'myenv':

    conda list -n myenv

Save packages for future use:

    conda list --export > package-list.txt

Reinstall packages from an export file:

    conda create -n myenv --file package-list.txt

然后我们可以使用如下命令

conda list -n yolov5-lh -r

 可以看到当前的conda环境有两个版本

然后可以使用如下命令回退到之前的版本

conda install --revision 0

2  复制和迁移

复制有好几种方法，我这里是直接cp命令把ens路径下的整个文件复制一份，我们创建的每个conda环境在/root/anaconda3/envs/路径下都会有个文件夹，

 复制就直接

cp -drf /root/anaconda3/envs/yolov5_chw  /root/anaconda3/envs/yolov5_chw_new

然后就可以用下面的命令激活新的环境。

conda activate yolov5_chw_new

同理，如果我们想把某个服务器的conda环境迁移到另一个服务器中，也可以直接把这个包复制到另一台服务器中。