In bash, the directory user and the directory user are the same directory. True False directory that contains a disk utility must be in your $ PATH environment variable in order to call the disk utility wh th itilitil pithruinue rue alse Which of the following shell's wildcards are used to match any number of characters inciuding none? [a-zA-z] [na-zA-Z] ? bash is a unix/linux command True False What does this command do? touch aFile; chmod 400 aFile creates an empty file readable by the owner only creates an empty file creates an empty file that is readable by all pipes the output of the touch command into the input of the chmod command What does this command do? echoa>b it outputs its parameters as strings to the standard output it creates a new file Which command repeats the last command? $? 13 $1 II What is the output of the following command? echo{a...c} A shell buitin is faster than executing a disk utility. True False Use a single is command to list all files that either begin with rt or end with rt How do we redirect 1/0 in Unix? By using > or or file redirects the standard input redirects the standard output redirects the standard error redirects both the standard output and the standard error Sometimes these two commands have identical behavior command > output command output True False When we don't care about the output of a command, we can redirect it to a special device (/devull) the standard output the standard error Which keystroke suspends the current running process? CTRL-Z CTRL-C CTRL-S You cannot redirect the standard input and the standard output at the same time. True False How many files are used for representing different standard streams? 2 3 4