environment variable

2022.04.20
#devops
use client /components/post/reExport environment variable 2022.04.20 ],
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      <H>environment variable</H>

      <ul>
        <li>env var is a name-value pair</li>
        <li>stores configuration information for your operating system and applications</li>
        <li>programs can access it when needed</li>
        <li>some are automatically set by your operating system during startup</li>
        <li>some applications might create environment variables during installation</li>
        <li>users can create them also</li>
        <li>
          may also set or modify environment variables directly on the fly using command{ }
          <code>export</code>
        </li>
        <li>env vars are not stored in a single central location</li>
        <li>as i understood they are loaded from different places into memory</li>
      </ul>

      <H>Win</H>

      <ul>
        <li>
          Search for <Code>Advanced system settings</Code> in Windows
        </li>
        <li>
          Click the <i>Advanced</i> tab
        </li>
        <li>
          Click the <i>Environment Variables</i> button in the bottom
        </li>
        <li>
          At work I had to use <i>User variable</i> window
        </li>
      </ul>

      <H>Mac</H>

      <ul>
        <li>
          <Code bash>printenv</Code> show environment variables
        </li>
        <li>
          <Code>
            echo $<i>var_name</i>
          </Code>{ }
          show specific variable value
        </li>
        <li>
          <Code>
            export <i>var_name</i>=<i>value</i>
          </Code>{ }
          set var temporarily in terminal session
        </li>
        <li>
          <Code bash>code ~/.zshrc</Code>, then add{ }
          <Code>
            export <i>var_name</i>=<i>value</i>
          </Code>
          , then <Code bash>source ~/.zshrc</Code> to add variable permanently into terminal profile
        </li>
      </ul>

      <H>Save var in session and use it in script</H>

      <Code block bash>{ your-project-id cloud-run-sa \${PROJECT_ID} Cloud Run Service Account Cloud Run Service Account
        file inside folders listed at <code>PATH</code> env
          variable
        </li>
        <li>
          we can check where executable is with <Code>where docker</Code>
        </li>
      </ul>

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