In Linux, files and directories are maintained by using tree-like structure True False Consider the following output is produced by an Is -alh command: Which of the following statements are true (choose all that applies)? "johndoe" is in "upg17706" group, but is not an "eecs" student anymore (excluded from the "eecs" group). In this case, "johndoe" cannot see any file in "home" directory. "home" is a symbolic link "hongsa" can make "bufferoverflow" executable by any users by running the command "chmod ug+x ./bufferoverflow" or "chmod 0770 ./bufferoverflow" "hongsa" is a user in "eecs" group "hongsa" can only read/write the README.md file In Linux, the permission (-rw-r--r--) is the same as 644 in the number-ed representation True False Consider the following bash-shell command: $./ myscript.sh output. txt 2>&1 \& Which of the following statement is false? " 2>&1 " means the messages sent to stdout will be redirected to the stderr buffer Both the messages sent to stdout and stderr are stored to output.txt The last " & " means the entire execution will be run in background myscript.sh takes the content of input.txt as input The messages sent to stdout will be stored to output.txt In Linux, opening a file as streams returns a FILE data structure upon success True False