You are not logged in. Your edit will be placed in a queue until it is peer reviewed.
We welcome edits that make the post easier to understand and more valuable for readers. Because community members review edits, please try to make the post substantially better than how you found it, for example, by fixing grammar or adding additional resources and hyperlinks.
How to Edit
        - Correct minor typos or mistakes
- Clarify meaning without changing it
- Add related resources or links
- Always respect the author’s intent
- Don’t use edits to reply to the author
        How to Format
    
    - 
                create code fences with backticks ` or tildes ~
                ```
 like so
 ```
- 
                add language identifier to highlight code
                ```python
 def function(foo):
 print(foo)
 ```
- put returns between paragraphs
- for linebreak add 2 spaces at end
- _italic_ or **bold**
- indent code by 4 spaces
- backtick escapes `like _so_`
- quote by placing > at start of line
- to make links (use https whenever possible)
                <https://example.com>[example](https://example.com)<a href="https://example.com">example</a>
            How to Tag
        
        A tag is a keyword or label that categorizes your question with other, similar questions. Choose one or more (up to 5) tags that will help answerers to find and interpret your question.
- complete the sentence: my question is about...
- use tags that describe things or concepts that are essential, not incidental to your question
- favor using existing popular tags
- read the descriptions that appear below the tag
If your question is primarily about a topic for which you can't find a tag:
- combine multiple words into single-words with hyphens (e.g. shell-script), up to a maximum of 35 characters
- creating new tags is a privilege; if you can't yet create a tag you need, then post this question without it, then ask the community to create it for you
lang-bash
        
$?always holds the result of the last command. You are supposed to save it to some other variable if you want to keep the result of a specific command for later.if ...; then ...can be rewritten as...; if $? = 0; then ...for elided parts in the same order. That may be more in line with what you want to do, because then you have a good place in which to save the value of$?to somewhere else.