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单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,2011-11-6,#,答案：,B,Which command lists all files in the/home file system?,A.find .-name /home,B.find /home -print,C.find .-name all,D.find /home -type all,答案：,B,Which of the following commands should be used to list all files in the root filesystem that are named.profile?,A.find .-name .profile,B.find /-name .profile -print,C.find *-name “*profile”-ls,D.find ./.profile -exec ls -l,答案：,A,What is the function of the dot in the,“find .-print”command?,A.searches a relative path,B.uses absolute path for its search,C.restricts the search to two directory levels,D.starts the search from the parent directory,What is the function of the dot in the,“,find.,print,”,command?,searches a relative path,uses absolute path for its search,restricts the search to two directory levels,starts the search from the parent directory,答案：,C,Which of the following commands should be used to list all files in the current directory that have been changed during the current 24-hour period?,A.find /-ls -name“*”-print,B.find .-mtime 24 -ls,C.find .-ctime 1 -print,D.find ./-mtime 24 -ls,答案：,C,What is displayed by the command grep v“#”?,A.all lines that begin with a,B.all lines that begin with a or#,C.all lines that do not begin with a#,D.lines that do not begin with a#or,答案：,D,Which command will display all lines in file1 that begin with the string abc and end with the string xyz?,A.grep “abc*xyz$”file1,B.grep abc*xyzn file1,C.grep abc file1|grep -v xyz$file1,D.grep “abc”file1|grep “xyz$”,答案：,B,Which command will display all lines in file1 that,contain the string abc but NOT the string xyz?,A.grep -E“abc&!xyz”file1,B.grep abc file1|grep -v xyz,C.grep abcxyz file1,D.grep -v xyz “abc”file1,答案：,B,Which command will display all lines in file1 that,contain either the string abc or the string xyz?,A.grep abc file1|grep xyz file1,B.grep -E “abc|xyz”file1,C.grep abc-xyz file1,D.grep abc|xyz$file1,答案：,A,What is displayed by the command,grep “a-zA-Z”pgm.s,A.all lines in pgm.s that begin with a letter,B.all words in pgm.s that begin with a letter,all files in the pgm.s directory that begin with,a letter,all processes beginning with a letter that are,a child process of pgm.s,答案：,A,Which command can be used to list or modify previously executed shell commands?,A.fc,B.env,C.prev,D.edit,答案：,A,Which command can be used to modify or re-execute any previous shell command after displaying the shell history?,A.fc,B.set,C.type,D.history,答案：,D,A user is trying to read a logfile that gets updated every minute.What is the correct command to view the new incoming messages in real time?,A.more logfile,B.cat -v logfile,C.pg logfile,D.tail -f logfile,答案：,B,Which of the following commands should be used to search for a$(dolor sign)only in file1?,A.grep “$”file1,B.grep$file1,C.grep -c$file1,D.grep$file1,
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