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Jesse_b

16:11

[ ! "$var" ] is not a valid test at all right?

Stephen Kitt

@Jesse_b yes, it is a valid test

it’s equivalent to [ ! -n "$var" ]

(see man [)

Jesse_b

16:38

@StephenKitt Thanks. Duh I was testing it wrong :(

I did this:

$ var=notnull
$ [ ! "$notnull" ] && echo yes
yes

Stephen Kitt

@Jesse_b excellent

Jesse_b

I still haven't finished my coffee :p

I will haze myself for this mistake

ilkkachu

seems normal enough. besides, you got it in about half an hour, it could have been worse.

Stephen Kitt

@Jesse_b set -u is your friend

Jesse_b

16:53

@StephenKitt ty sir! That is nice and I had not known about it

I'm currently just going through this 2000+ line file full of functions that is used by my company though and trying to interpret it / write up usage information on it

I really want to rewrite some of this stuff but I don't even fully understand it and it seems like a project that I would like to avoid lol

I was asking about that test because I wanted to change them all to [[ -z "$var" ]]

3 hours later…

JBallin

20:08

I have my bash prompt printing a new line before the prompt to give me space between the last command. the issue is that the new line is also there on login. any ideas for how I could eliminate that new line?

```

$
```
vs.
```
$
```

JBallin

20:22

so I found a decent solution. now I'm wondering the best way to add a new line to an existing PS1. Something like PS1='\n$PS1' (which isn't working)

JBallin

20:35

PS1=YOUR PROMPT HERE (without newline)

reset_prompt () {
  PS1="\n$PS1"
}
PROMPT_COMMAND='(( PROMPT_CTR-- < 0 )) && {
  unset PROMPT_COMMAND PROMPT_CTR
  reset_prompt
}'

^ solved

user9303970

21:11

What is the main thing you miss in Debian compared to Ubuntu?

user9303970

21:48

How would you improve this question? Please reply there

-2

Q: Ubuntu 18.04 tracking a PC is still a "free software"?

I read this article. I admit I don't understand if the author is sarcastic when emphasizing the fact that Ubuntu will make the results of the data public, for everyone to see in a large <h3> HTML tag, but anyway, I still want to ask, isn't such implementation take out the Free Software element o...