题目内容

Which of the following are command line utilities that can be used to download web pages? Select all answers that apply.

A. wget
B. ssh
C. curl
D. Epiphany

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Which of the following are graphical browsers used in Linux? Select all answers that apply.

A. lynx
B. Mozilla Firefox
C. Konqueror
D. Google Chrome

Which command checks whether a host is online?

A. ping
B. route
C. traceroute
D. netstat

In an if statement, the ____ operator is used with a name as argument to check if it exists and is a directory.

A. -e
B. -d
C. -f
D. -s

Which of the following are correct conditional options that can be used to test for file attributes? Select all answers that apply.

A. -e
B. -z
C. -d
D. -r