单选题
You wish to kill a process with a PID of 123. Select the command which exiting.（）
kill-1 123
kill-9 123
kill-15 123
kill-17 123
单选题
What command will print a list of usernames （first column） and their corresponding user id （uid， third column） from /etc/passwd？（）
cut -d： -f 1，3 /etc/passwd
chop -c 1，3 /etc/passwd
tac 1-3/etc/passwd
fmt -u /etc/passwd
单选题
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？（）
tr ’/r/n’ < userlist.txt > newlist.txt
tr -c ’/n/r’ < newlist.txt > userlist.txt
tr -d /r¯ < userlist.txt > newlist.txt
tr /r¯/n¯ userlist.txt newlist.txt
tr -s ®^M’¡®^J’ userlist.txt newlist.tx
单选题
What is the output when the following shell script executes？（） cat<；<；foobar Hello foobar foobar
The contents of the file foobar.
Hello
No output but a file named foobar is created.
Hello foobar
Hello foobar foobar
单选题
You are running Linux 2.0.36 and you need to add a USB mouse to your system. Which of the following statements is true？（）
You need to rebuild the kernel.
You need to upgrade the kernel
You need to load the USB modules for your existing modular kernel.
USB support is not available in Linux.
单选题
What information is displayed by the command cat/proc/dma？（）
whether DMA is enabled
which DMA channels are in use
which DMA mode is in use
general information about DMA on the machine
多选题
What does the Filesystem Hierarchy Standard enable？ （）
software to predict the location of installed files and directories
software to predict the ownership and access rights to files and directories
users to predict the location of installed files and directories
users to predict how the filesystem should be formatted according to need
单选题
You have read/write permission on an ordinary file foo. You have just run In foo bar. What would happen if you ran rm foo？（）
foo and bar would both be removed.
foo would be removed while bar would remain accessible.
foo would be removed， bar would still exist but would be unusable.
Both foo and bar would remain accessible.
You would be asked whether bar should be removed.
单选题
In xorg.conf， which section is concerned with fonts？（）
the Fonts section
the Files section
the xfsCodes section
the Graphics section
the modeline section
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