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@@ -73,7 +73,44 @@ bash-3.2$ ls /Users/mokha/memos/memo.james /Users/mokha/memos/memo.james ``` +15. Give the command for deleting the memos directory. How do you know that the directory has been deleted? + +```bash +bash-3.2$ cd
+bash-3.2$ rm -fr memos/
+bash-3.2$ ls -alh memos
+``` + +16. Why does a shell process terminate when you press <Ctrl-D> at the beginning of a new line? + +```text +The ^D represents the eof or end of file. +``` + +```bash +モ stty -a +speed 9600 baud; 14 rows; 238 columns; +lflags: icanon isig iexten echo echoe -echok echoke -echonl echoctl + -echoprt -altwerase -noflsh -tostop -flusho pendin -nokerninfo + -extproc +iflags: -istrip icrnl -inlcr -igncr -ixon ixoff ixany imaxbel iutf8 + -ignbrk brkint -inpck -ignpar -parmrk +oflags: opost onlcr -oxtabs -onocr -onlret +cflags: cread cs8 -parenb -parodd hupcl -clocal -cstopb -crtscts -dsrflow + -dtrflow -mdmbuf +cchars: discard = ^O; dsusp = ^Y; eof = ^D; eol = <undef>; + eol2 = <undef>; erase = ^?; intr = ^C; kill = ^U; lnext = ^V; + min = 1; quit = ^\; reprint = ^R; start = ^Q; status = ^T; + stop = ^S; susp = ^Z; time = 0; werase = ^W; +``` +17. Give a command line to display the types of all the files in your ∼/unix directory that start with the word chapter, are followed by a digit 1, 2, 6, 8, or 9, and end with .eps or .prn. + + 2. Solve problems 7–17 at the end of Chapter 8. + + + + 3. Do problem 9 (What do the following commands do?) in Chapter 9. 4. Enter a C program that reads a temperature in Celsius entered from a keyboard and displays the corresponding temperature in Fahrenheit and complete the steps below. (Hint: Look for such a program in the textbook or online.) |