# devenv > Fast, Declarative, Reproducible and Composable Developer Environments using Nix. > More information: . - Initialize the environment: `devenv init` - Enter the Development Environment with relaxed hermeticity (state of being airtight): `devenv shell --impure` - Get detailed information about the current environment: `devenv info --verbose` - Start processes with `devenv`: `devenv up --config {{path/to/file}}` - Clean the environment variables and re-enter the shell in offline mode: `devenv --clean --offline` - Delete the previous shell generations: `devenv gc`