29. What is the original UNIX shell? 30. Thecommand displays the entire history list. 31. How can you locate a previously used command from the history list? . b. Bourne c. bash a. showhistory b. list e. listhist d. history a. Use the beginning of a command b. Use the history number Search the history list All of the above c. d. 32. Some Linux distributions, including Red Hat Linus, provide a(a) script that is executed for all users on the system each time a bash shell is started a. letc/profile b. profile Which of the following scripts is executed first? . /eteprofile b. profile Which of the following uses the proper syntax for the alias command? c, d. /etc/bashrc bashrec 33. c. d. /etc/bashrc .bashre 34. c. create alias muont mount d. set alias muont- mount alias muont mount a. b. alias muont mount Which of the following commands uses command line expansion? a- echo Your file was processed on date +%m%d/%y, b. echo Your file has been processed c. echo l d. ep file /tmp 35. You can use the your current environment a. export b. set 36. command to start a program with an environment variable setting that is not part of c. use d. env 37. The_ command displays a list of all environment variables defined in your current environment. a. export b. set c. use d. env 38. The environment variable contains a list of directories on the Linux system that the shell searches each time a command is executed. a. HOME b. BIN c PATH d. EXE What is the standard input channel? a. STDIN b. STDOUT 39. c. STDERR d. STDINPUT 40. Which redirection operator appends STDOUT output to the given file name (adding it to the end of any existing file contents)? 41. What is the pipe symbol? a. b. The message. a. gmail 42. command is a basic e-mail client that you can use from the command line to create an e-mail c. mail