- Bash (GNU Bourne again shell), version >= 4.0
- coreutils
$BASH_LIB— path to Bash library directory
1— current shell is not Bash.2— Bash version is not supported (less than 4.0).3— packagecoreutilsis not installed.255— Bash lib was not initialized.
_<lib>_<name>— private variables._<lib>::<name>— private functions._<lib>::init— library initialization.