env

Cross-platform environment variable management.

Synopsis

tofu env [flags] [command]

Description

List, get, set, or filter environment variables. Works consistently across Windows, macOS, and Linux.

Flags

Flag	Short	Description	Default
--format	-f	Output format: plain, json, shell, powershell	plain
--filter		Filter variables by prefix (case-insensitive)
--sort	-s	Sort variables alphabetically	true
--keys	-k	Show only variable names	false
--values	-v	Show only variable values	false
--get	-g	Get a specific environment variable
--set		Set variable (KEY=VALUE) and run command
--unset	-u	Unset variable and run command
--export	-e	Output in export format for shell sourcing	false
--no-empty		Hide variables with empty values	false

Examples

List all environment variables:

tofu env

Get a specific variable:

tofu env -g PATH

Filter by prefix:

tofu env --filter HOME

JSON output:

tofu env -f json

Shell export format:

tofu env -e
# Or explicitly:
tofu env -f shell

PowerShell format:

tofu env -f powershell

Set variable and run command:

tofu env --set "NODE_ENV=production" npm start

Unset variable and run command:

tofu env -u DEBUG npm start

Show only keys:

tofu env -k

Hide empty values:

tofu env --no-empty

Sample Output

Plain format:

HOME=/home/user
PATH=/usr/bin:/bin
USER=johndoe

JSON format:

{
  "HOME": "/home/user",
  "PATH": "/usr/bin:/bin",
  "USER": "johndoe"
}

Shell export format:

export HOME='/home/user'
export PATH='/usr/bin:/bin'
export USER='johndoe'