单项选择题
A. export LD_PRELOAD=/usr/local/lib B. export LD_LIBRARY_PATH=/usr/local/lib C. Idconfig /usr/local/lib D. Idd/usr/local/lib
Usingvi，youwanttosavechangestothefilemyfilewith：w!，butv...
单项选择题Using vi， you want to save changes to the file myfile with ：w!， but vi complains it cannot write to the file. Therefore， you want to check the write permissions on the file. To do this without leaving vi， you type：（）
A. ：!ls-I myfile B. ：\ls-l myfile C. esc ：Is -I myfile D. ：？ls-l myfile
YouwishtokillaprocesswithaPIDof123.Selectthecommandwhic...
单项选择题You wish to kill a process with a PID of 123. Select the command which exiting.（）
A. kill-1 123 B. kill-9 123 C. kill-15 123 D. kill-17 123
WhichofthefollowingcommandswillchangeallCR-LFpairsinani...
单项选择题Which of the following commands will change all CR-LF pairs in an imported text file， userlist.txt， to Linux standard LF characters and store it as newlist.txt？（）
A. tr ’\r\n’ " < userlist.txt > newlist.txt B. tr -c ’\n\r’ " < newlist.txt > userlist.txt C. tr -d \r¯ < userlist.txt > newlist.txt D. tr \r¯\n¯ userlist.txt newlist.txt E. tr -s ®^M’¡®^J’ userlist.txt newlist.tx
