basicsys@mars~/lec7/example1>ls 7e 8 ae18 ae19 basicsys@mars~/lec7/example1>ls *7 ls: *7: No such file or directory basicsys@mars~/lec7/example1>ls X ls: X: No such file or directory basicsys@mars~/lec7/example1>ls *7* 7e basicsys@mars~/lec7/example1>ls *e 7e basicsys@mars~/lec7/example1>ls e* ls: e*: No such file or directory basicsys@mars~/lec7/example1>ls *e* 7e ae18 ae19 basicsys@mars~/lec7/example1>ls 7e 8 ae18 ae19 basicsys@mars~/lec7/example1>ls *[e9] 7e ae19 basicsys@mars~/lec7/example1>ls 7e 8 ae18 ae19 basicsys@mars~/lec7/example1>ls a* ae18 ae19 basicsys@mars~/lec7/example1>ls a ls: a: No such file or directory basicsys@mars~/lec7/example1>ls f* ls: f*: No such file or directory basicsys@mars~/lec7/example1>ls ?? 7e basicsys@mars~/lec7/example1>ls ??? ls: ???: No such file or directory basicsys@mars~/lec7/example1>ls ???? ae18 ae19 basicsys@mars~/lec7/example1>ls ae* ae18 ae19 basicsys@mars~/lec7/example1>ls ae*8 ae18 basicsys@mars~/lec7/example1>ls 7e* 7e basicsys@mars~/lec7/example1>ls 7e? ls: 7e?: No such file or directory basicsys@mars~/lec7/example1>ls *8 8 ae18 basicsys@mars~/lec7/example1>cat a* file1 file2 basicsys@mars~/lec7/example1>cat ae18 file1 basicsys@mars~/lec7/example1>cat ae19 file2 basicsys@mars~/lec7>ls ex* example1: 7e 8 ae18 ae19 example2: aaa111 ad1b adb basicsys@mars~/lec7>ls ex*/a* example1/ae18 example2/aaa111 example2/adb example1/ae19 example2/ad1b basicsys@mars~/lec7>ls ex*/a[de]* example1/ae18 example1/ae19 example2/ad1b example2/adb basicsys@mars~/lec7/example1>ls 7e 8 ae18 ae19 basicsys@mars~/lec7/example1>cat 7e file3 basicsys@mars~/lec7/example1>ls 7e 8 ae18 ae19 basicsys@mars~/lec7/example1>ls 7e 7e basicsys@mars~/lec7/example1>ls ae* ae18 ae19 basicsys@mars~/lec7/example1>ls * 7e 8 ae18 ae19 basicsys@mars~/lec7/example1>ls ? 8 basicsys@mars~/lec7/example1>ls ?? 7e basicsys@mars~/lec7/example1>cat ?? file3 basicsys@mars~/lec7/example1>cat a* file1 file2 basicsys@mars~/lec7/example1>cat ae18 file1 basicsys@mars~/lec7/example1>cat ae19 file2 basicsys@mars~/lec7/example1>ls 7e 8 ae18 ae19 basicsys@mars~/lec7/example1>ls *?[d-e18] 7e ae18 basicsys@mars~/lec7/example1>ls [a-e][a-e][a-e] ls: [a-e][a-e][a-e]: No such file or directory basicsys@mars~/lec7/example1>ls F200 ls: F200: No such file or directory basicsys@mars~/lec7/example1>ls [a-e][a-e][a-e]* ls: [a-e][a-e][a-e]*: No such file or directory basicsys@mars~/lec7/example1>ls [a-e][a-e]* ae18 ae19 basicsys@mars~/lec7/example2>ls aaa111 ad1b adb basicsys@mars~/lec7/example2>ls [a-e][a-e][a-e]* aaa111 adb basicsys@mars~/lec7/example2>ls [a-e][a-e][a-e] adb basicsys@mars~/lec7>ls ex*/a* example1/ae18 example2/aaa111 example2/adb example1/ae19 example2/ad1b basicsys@mars~/lec7>ls ex*/a* >|F1 basicsys@mars~/lec7>cat F1 example1/ae18 example1/ae19 example2/aaa111 example2/ad1b example2/adb basicsys@mars~/lec6>cat F2 Jim Alchin 21 Seattle aef Bill Gates 21 Seattle aef Steve Jobs 21 Nevada aaa Scott Neally 85 Los Angeles basicsys@mars~/lec6>grep 21 F2 Jim Alchin 21 Seattle aef Bill Gates 21 Seattle aef Steve Jobs 21 Nevada aaa basicsys@mars~/lec6>grep "21 S" F2 Jim Alchin 21 Seattle aef Bill Gates 21 Seattle aef basicsys@mars~/lec6>grep "21 s" F2 basicsys@mars~/lec6>grep -c "21 s" F2 0 basicsys@mars~/lec6>grep -c "21 S" F2 2 basicsys@mars~/lec6>egrep -c "21 S" F2 2 basicsys@mars~/lec6>grep -E -c "21 S" F2 2 basicsys@mars~/lec6>cat F2 Jim Alchin 21 Seattle aef Bill Gates 21 Seattle aef Steve Jobs 21 Nevada aaa Scott Neally 85 Los Angeles basicsys@mars~/lec6>egrep [a-d][a-d] F2 Steve Jobs 21 Nevada aaa basicsys@mars~/lec6>egrep [^a-d]ea F2 Jim Alchin 21 Seattle aef Bill Gates 21 Seattle aef Scott Neally 85 Los Angeles basicsys@mars~/lec6>egrep [^Ait]l F2 Bill Gates 21 Seattle aef Scott Neally 85 Los Angeles basicsys@mars~/lec6>egrep [^Aitl]l F2 Scott Neally 85 Los Angeles basicsys@mars~/lec6>egrep ^[abc] F2 basicsys@mars~/lec6>egrep ^[^S] F2 Jim Alchin 21 Seattle aef Bill Gates 21 Seattle aef basicsys@mars~/lec6>egrep ^[^SB] F2 Jim Alchin 21 Seattle aef basicsys@mars~/lec6>cat F2 Jim Alchin 21 Seattle aef Bill Gates 21 Seattle aef Steve Jobs 21 Nevada aaa Scott Neally 85 Los Angeles basicsys@mars~/lec6>egrep [as]$ F2 Steve Jobs 21 Nevada aaa Scott Neally 85 Los Angeles basicsys@mars~/lec6>egrep [^as]$ F2 Jim Alchin 21 Seattle aef Bill Gates 21 Seattle aef basicsys@mars~/lec6>egrep [^as]$ F2 Jim Alchin 21 Seattle aef Bill Gates 21 Seattle aef basicsys@mars~/lec6>egrep ^[JBSas]$ F2 basicsys@mars~/lec6>cat F2 | cut -c1 >| F11 basicsys@mars~/lec6>cat F11 J B S S basicsys@mars~/lec6>egrep ^[Bill]$ F2 basicsys@mars~/lec6>egrep ^[Bill]$ F11 B basicsys@mars~/lec6>egrep ^[BS]$ F11 B S S basicsys@mars~/lec6>cat F11 JJ B S S basicsys@mars~/lec6>egrep ^[JB]$ F11 B basicsys@mars~/lec6>egrep ^.$ F11 B S S basicsys@mars~/lec6>egrep ^..$ F11 JJ basicsys@mars~/lec7>cat F1 abb8a 2abb8a abba abbba basicsys@mars~/lec7>egrep "^ab.[^a]" F1 abb8a abbba basicsys@mars~/lec7>cat F1 a8b a88b a8 8 basicsys@mars~/lec7>egrep "[0-9]$" F1 a8 8 basicsys@mars~/lec7>cat F1 88 8 aa a basicsys@mars~/lec7>egrep "^[^0-9]$" F1 a basicsys@mars~/lec7>cat F1 caca caac caa ca c basicsys@mars~/lec7>egrep "^ca*$" F1 caa ca c basicsys@mars~/lec7>cat F1 caca caa cacaa basicsys@mars~/lec7>egrep "^(ca)*$" F1 caca