How would you copy only the files ending in mp3? 73. How would you copy the files from another directory into this one? 74. How would you copy the files from one directory to another? 75. How would you exit vi without saving the edits? 76. How would you save an edited file in vi to another file? 77. Why do you use quotes in a sed command line like s/a/b/ ? 78. Why do you use quotes in an awk command line like {print $1,$2,$5,$4,$3} 79. What pattern does BEGIN match in awk? 80. what pattern does END match in awk? 81. what pattern does $1 < 20 match in awk? 82. What does the following awk line do? $1 == "ATOM" {na += 1; print } 83. Whats special about the \proc directory? 84. what does ps -aux do? Whats different from just ps? 85. what is top for? 86. What is a process id? 87. Do process ids keep going for ever? 88. What does kill -9 12345 do? 89. Whats nohup? 90. The command apropos script produces pages and pages of output. What can you do to make that manageable? 91. Whats in the \dev directory? 92. How would you prevent any other user from reading a file in your area? 93. How do you make a file exectutable?