TY  - BOOK
AU  - Helmke,Matthew
TI  - Ubuntu linux unleashed 2021 edition: unleashed 
SN  - 9780136778851
PY  - 2021///
CY  - Hoboken
PB  - Pearson Education, 
KW  - SISTEMAS OPERATIVOS
KW  - LINUX
KW  - UBUNTU
N1  - En cub.: covers 20.04, 20.10, and 21.04
LC  -   2020937219
ER  -