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# Useful Linux command line tools

> An incomplete list of useful Linux command-line tools

*Published on 2023-04-16 · [View as HTML](https://codefionn.eu/useful-linux-command-line-tools/) · [Auf Deutsch lesen](https://codefionn.eu/neutzliche-linux-kommandozeilen-tools/)*

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This is an incomplete list of some useful Linux/\*BSD command-line tools:

<table>
  <thead>
    <tr>
      <th>Command</th>
      <th>Description</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>ncdu</td>
      <td>List size of directories and files</td>
    </tr>
    <tr>
      <td>sed -i 's/old/new/'</td>
      <td>Find & replace with Regex</td>
    <tr>
      <td>telnet host port</td>
      <td>Test cleartext network connection</td>
    </tr>
    <tr>
      <td>openssl s_client -connect host:port</td>
      <td>Test encrypted network connection</td>
    </tr>
    <tr>
      <td>vim/emacs</td>
      <td>(Most) Powerful text editor. Install COC plugins for the awesome vscode language server.</td>
    </tr>
    <tr>
      <td>fd</td>
      <td>Awesome rust replacement for find</td>
    </tr>
    <tr>
      <td>rg</td>
      <td>Awesome rust replacement for grep</td>
    </tr>
    <tr>
      <td>bat</td>
      <td>Not a replacment for cat but an addition</td>
    </tr>
    <tr>
      <td>netstat -tulpn</td>
      <td>Show open network ports</td>
    </tr>
  </tbody>
</table>

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