![Ask Ubuntu Memes on Twitter: "Command to return package version or empty string https://t.co/XfCCiy8s2S #dpkg #apt #bash https://t.co/beoNc6GR0L" / Twitter Ask Ubuntu Memes on Twitter: "Command to return package version or empty string https://t.co/XfCCiy8s2S #dpkg #apt #bash https://t.co/beoNc6GR0L" / Twitter](https://pbs.twimg.com/media/FAK13KNUUAE1h0Z.jpg)
Ask Ubuntu Memes on Twitter: "Command to return package version or empty string https://t.co/XfCCiy8s2S #dpkg #apt #bash https://t.co/beoNc6GR0L" / Twitter
![finite automata - Acceptance of empty string by nondeterministic automaton - Computer Science Stack Exchange finite automata - Acceptance of empty string by nondeterministic automaton - Computer Science Stack Exchange](https://i.stack.imgur.com/bjd3v.png)
finite automata - Acceptance of empty string by nondeterministic automaton - Computer Science Stack Exchange
![Bash Tutorial for Strings | Strings Bash Script | Shell Scripting Tutorial | Shell Scripting Linux - YouTube Bash Tutorial for Strings | Strings Bash Script | Shell Scripting Tutorial | Shell Scripting Linux - YouTube](https://i.ytimg.com/vi/a2TXbgka60M/maxresdefault.jpg)