Study tips LX0-104

What happens if the password of a user in the /etc/shadow file is prepended with the ! character?

Which of the following details can be found in an entry of a user specific crontab?

what character?

what should the administrator do?

Which of the following crontab entries will execute myscript at 30 minutes past every hour on Sundays?

Which of the following files assigns a user to its primary group?

Which of the following commands should be added to /etc/bash_profile in order to change the language of messages for an internationalized program to Portuguese (pt)?

which file, if present, must all users be listed that are allowed to use the cron scheduling system?

Which commands can be used to change a user’s account aging information?

Which command is used to add an empty group to the system?