///

/// tip

Do this **once**, right after you create the virtual environment.

///

<div class="termy">

```console
$ echo "*" > .venv/.gitignore
```

</div>

/// details | What that command means

* `echo "*"`: will "print" the text `*` in the terminal (the next part changes that a bit)

  }

  public void testHash() throws IOException {
    ByteSource byteSource = new TestByteSource("hamburger\n".getBytes(US_ASCII));

    // Pasted this expected string from `echo hamburger | sha512sum`
    assertThat(byteSource.hash(sha512()).toString())
        .isEqualTo(

        public int add2(final int arg1, final int arg2) {
            return arg1 + arg2;
        }

        /**
         * @param arg
         * @return Integer
         */
        public Integer echo(final Integer arg) {
            return arg;
        }

        /**
         *
         */
        public void throwException() {
            throw new IllegalStateException("hoge");
        }

                }
            }
        }
    }

    private boolean checkChannelHealth(ChannelInfo channel) {
        // Simplified health check - in real implementation would send a ping/echo
        return channel.getTransport() != null;
    }

///

/// tip | 提示

通常你只需要在创建虚拟环境后 **执行一次** 这个操作。

///

<div class="termy">

```console
$ echo "*" > .venv/.gitignore
```

</div>

/// details | 上述命令的含义

* `echo "*"`: 将在终端中 "打印" 文本 `*`（接下来的部分会对这个操作进行一些修改）
* `>`: 使左边的命令打印到终端的任何内容实际上都不会被打印，而是会被写入到右边的文件中
* `.gitignore`: 被写入文本的文件的名称

而 `*` 对于 Git 来说意味着 "所有内容"。所以，它会忽略 `.venv` 目录中的所有内容。

	// still broken on our builders in 2023. Instead, append the exitcode to
	// the output and parse it from there.
	filter, exitStr := newExitCodeFilter(os.Stdout)
	args += "; echo -n " + exitStr + "$?"

	cmd := adbCmd("exec-out", args)
	cmd.Stdout = filter
	// If the adb subprocess somehow hangs, go test will kill this wrapper
	// and wait for our os.Stderr (and os.Stdout) to close as a result.

        lenient().when(fh.isValid()).thenReturn(true);
        lenient().when(fh.getTree()).thenReturn(tree);
        when(fh.getFid()).thenReturn(99);

        // Mock send to just echo the provided response instance
        when(tree.send(any(TransTransactNamedPipe.class), any(TransTransactNamedPipeResponse.class), eq(RequestParam.NO_RETRY)))
                .thenAnswer(inv -> inv.getArgument(1));

... However, quotes inside code snippets must stay as is.

////

## code blocks { #code-blocks }

//// tab | Test

A Bash code example...

```bash
# Print a greeting to the universe
echo "Hello universe"
```

...and a console code example...

```console
$ <font color="#4E9A06">fastapi</font> run <u style="text-decoration-style:solid">main.py</u>

                <phase>initialize</phase>
                <goals>
                  <goal>exec</goal>
                </goals>
                <configuration>
                  <executable>echo</executable>
                  <arguments>
                    <argument>${javaHome}</argument>
                  </arguments>
                  <outputFile>${project.build.directory}/java_11_home</outputFile>

    /** SMB2 IO control command */
    protected static final short SMB2_IOCTL = 0x000B;
    /** SMB2 cancel command */
    protected static final short SMB2_CANCEL = 0x000C;
    /** SMB2 echo/keepalive command */
    protected static final short SMB2_ECHO = 0x000D;
    /** SMB2 query directory command */
    protected static final short SMB2_QUERY_DIRECTORY = 0x000E;
    /** SMB2 change notify command */