单项选择题
An operator is editing a file using vi. Which of the following subcommand sequences will copy the current line plus the next 2 lines to the end of the file?（）
A. yy E 3p
B. 3yy G p
C. 3yy :e 5pp
D. yy :g 3p
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How can an operator temporarily gain access to the command line while in a smit session, without losing the current smit session?（）
A. F2 key
B. F6 key
C. F8 key
D. F9 key -
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Which of the following commands will display, in MB, the total, used, and free blocks of the currently mounted filesystems?（）
A. df -m
B. du -m
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D. du -vm -
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Which of the following is a correct statement about how the user environment is configured at login?（）
A. If present, the settings in the $HOME/.profile file will override the settings in the /etc/profile file.
B. If both $HOME/.profile and $HOME/.env files are present, the settings in the $HOME/.profile file will take precedence.
C. The settings in the /etc/environment file are system-wide and will override user customized settings in the $HOME/.profile.
D. The settings in the /etc/profile file will override settings in the $HOME/.profile file unless the $LOCAL_PROFILE variable is set to 'true'.
