bash history missing issues with serval terminat issue

please resolve it as follows:

Certainly! Below is a sample `~/.bashrc` snippet that you can use to manage your Bash history across multiple terminal sessions. You can copy and paste this into your `~/.bashrc` file.

```bash

# Append to the history file, don't overwrite it

shopt -s histappend

# Increase the history size

export HISTSIZE=10000

export HISTFILESIZE=20000

# Ensure history is written and read immediately

export PROMPT_COMMAND='history -a; history -n'

```

### Steps to Apply:

1. **Open your `~/.bashrc` file**:

  ```bash

  nano ~/.bashrc

  ```

2. **Add the snippet**: Copy and paste the above snippet into the file.

3. **Save and exit**: If using `nano`, press `CTRL + O` to save and `CTRL + X` to exit.

4. **Apply the changes**:

  ```bash

  source ~/.bashrc

  ```

This setup will help ensure that your command history is preserved across multiple terminal sessions.