If conda is outdated, a warning will be displayed each time we try to use it:
Example #1:
(my-env) $ conda remove opencv
Collecting package metadata (repodata.json): done
Solving environment: done
==> WARNING: A newer version of conda exists. <==
current version: 4.8.5
latest version: 4.9.0
Please update conda by running
$ conda update -n base -c defaults conda
...
Example #2:
(my-env) $ conda install -c conda-forge opencv
Collecting package metadata (current_repodata.json): done
Solving environment: failed with initial frozen solve. Retrying with flexible solve.
Solving environment: failed with repodata from current_repodata.json, will retry with next repodata source.
Collecting package metadata (repodata.json): done
Solving environment: done
==> WARNING: A newer version of conda exists. <==
current version: 4.8.5
latest version: 4.9.0
Please update conda by running
$ conda update -n base -c defaults conda
...
Conda itself is updated just like any other conda package, with conda update command:
$ conda update --help
usage: conda update [-h] [-n ENVIRONMENT | -p PATH] [-c CHANNEL] [--use-local]
[--override-channels] [--repodata-fn REPODATA_FNS]
[--strict-channel-priority] [--no-channel-priority]
[--no-deps | --only-deps] [--no-pin] [--copy] [-C] [-k]
[--offline] [-d] [--json] [-q] [-v] [-y] [--download-only]
[--show-channel-urls] [--file FILE] [--force-reinstall]
[--freeze-installed | --update-deps | -S | --update-all | --update-specs]
[--clobber]
[package_spec [package_spec ...]]
Updates conda packages to the latest compatible version.
This command accepts a list of package names and updates them to the latest
versions that are compatible with all other packages in the environment.
Conda attempts to install the newest versions of the requested packages. To
accomplish this, it may update some packages that are already installed, or
install additional packages. To prevent existing packages from updating,
use the --no-update-deps option. This may force conda to install older
versions of the requested packages, and it does not prevent additional
dependency packages from being installed.
Options:
positional arguments:
package_spec Packages to install or update in the conda
environment.
optional arguments:
-h, --help Show this help message and exit.
--file FILE Read package versions from the given file. Repeated
file specifications can be passed (e.g. --file=file1
--file=file2).
Target Environment Specification:
-n ENVIRONMENT, --name ENVIRONMENT
Name of environment.
-p PATH, --prefix PATH
Full path to environment location (i.e. prefix).
Channel Customization:
-c CHANNEL, --channel CHANNEL
Additional channel to search for packages. These are
URLs searched in the order they are given (including
local directories using the 'file://' syntax or simply
a path like '/home/conda/mychan' or '../mychan').
Then, the defaults or channels from .condarc are
searched (unless --override-channels is given). You
can use 'defaults' to get the default packages for
conda. You can also use any name and the .condarc
channel_alias value will be prepended. The default
channel_alias is http://conda.anaconda.org/.
--use-local Use locally built packages. Identical to '-c local'.
--override-channels Do not search default or .condarc channels. Requires
--channel.
--repodata-fn REPODATA_FNS
Specify name of repodata on remote server. Conda will
try whatever you specify, but will ultimately fall
back to repodata.json if your specs are not
satisfiable with what you specify here. This is used
to employ repodata that is reduced in time scope. You
may pass this flag more than once. Leftmost entries
are tried first, and the fallback to repodata.json is
added for you automatically.
Solver Mode Modifiers:
--strict-channel-priority
Packages in lower priority channels are not considered
if a package with the same name appears in a higher
priority channel.
--no-channel-priority
Package version takes precedence over channel
priority. Overrides the value given by `conda config
--show channel_priority`.
--no-deps Do not install, update, remove, or change
dependencies. This WILL lead to broken environments
and inconsistent behavior. Use at your own risk.
--only-deps Only install dependencies.
--no-pin Ignore pinned file.
--force-reinstall Ensure that any user-requested package for the current
operation is uninstalled and reinstalled, even if that
package already exists in the environment.
--freeze-installed, --no-update-deps
Do not update or change already-installed
dependencies.
--update-deps Update dependencies.
-S, --satisfied-skip-solve
Exit early and do not run the solver if the requested
specs are satisfied. Also skips aggressive updates as
configured by 'aggressive_update_packages'. Similar to
the default behavior of 'pip install'.
--update-all, --all Update all installed packages in the environment.
--update-specs Update based on provided specifications.
Package Linking and Install-time Options:
--copy Install all packages using copies instead of hard- or
soft-linking.
--clobber Allow clobbering of overlapping file paths within
packages, and suppress related warnings.
Networking Options:
-C, --use-index-cache
Use cache of channel index files, even if it has
expired.
-k, --insecure Allow conda to perform "insecure" SSL connections and
transfers. Equivalent to setting 'ssl_verify' to
'false'.
--offline Offline mode. Don't connect to the Internet.
Output, Prompt, and Flow Control Options:
-d, --dry-run Only display what would have been done.
--json Report all output as json. Suitable for using conda
programmatically.
-q, --quiet Do not display progress bar.
-v, --verbose Can be used multiple times. Once for INFO, twice for
DEBUG, three times for TRACE.
-y, --yes Do not ask for confirmation.
--download-only Solve an environment and ensure package caches are
populated, but exit prior to unlinking and linking
packages into the prefix.
--show-channel-urls Show channel urls. Overrides the value given by `conda
config --show show_channel_urls`.
Examples:
conda update -n myenv scipy
This is the command for updating the conda:
(my-env) $ conda update -n base -c defaults conda
Collecting package metadata (current_repodata.json): done
Solving environment: done
## Package Plan ##
environment location: /home/bojan/anaconda3
added / updated specs:
- conda
The following packages will be downloaded:
package | build
---------------------------|-----------------
conda-4.9.0 | py38_0 2.9 MB
conda-package-handling-1.7.2| py38h03888b9_0 886 KB
------------------------------------------------------------
Total: 3.7 MB
The following packages will be UPDATED:
conda 4.8.5-py38_0 --> 4.9.0-py38_0
conda-package-han~ 1.6.1-py38h7b6447c_0 --> 1.7.2-py38h03888b9_0
Proceed ([y]/n)? y
Downloading and Extracting Packages
conda-4.9.0 | 2.9 MB | ################################################################################################ | 100%
conda-package-handli | 886 KB | ################################################################################################ | 100%
Preparing transaction: done
Verifying transaction: done
Executing transaction: done