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  1. #!/bin/bash
  2.  
  3. read -p "Type smth: " text
  4. if [[ $text =~ ^[[:alnum:]_]+$ ]]
  5. then
  6.     echo "ok"
  7. else
  8.     echo "not ok"
  9. fi
Success #stdin #stdout 0.01s 5380KB
comments (?)
stdin 
Something
stdout 
ok
https://ideone.com/mWOfny
language:
Bash (bash 5.0.3)
created:
3 years ago
visibility:
secret

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