A. kill-1 123
B. kill-9 123
C. kill-15 123
D. kill-17 123
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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
A. foo and bar would both be removed.
B. foo would be removed while bar would remain accessible.
C. foo would be removed, bar would still exist but would be unusable.
D. Both foo and bar would remain accessible.
E. You would be asked whether bar should be removed.
A. -remove removes the program, -purge also removes the config files
B. -remove only removes the program, -purge only removes the config files
C. -remove removes a package, -purge also removes all packages dependent on it
D. -remove removes only the package file itself, -purge removes all files related to the package
A. the process id of last background command
B. the exit status of the last command
C. the exit status of the last background command
D. the process id of the current shell
E. the name of the command being executed
A. xfserv
B. xfs
C. fonts
D. xfstt
E. fserv
A. mount /dev/cdrom /mnt/cdrom
B. mount/dev/cdrom
C. mount -t cdrom /dev/cdrom /mnt/cdrom
D. mount /mnt/cdrom
E. automount /mnt/hdd /mnt/cdrom
最新试题
You are looking for an executable file foo. Select the command that would search forfoo within directories set in the shell variable, PATH.()
What command will print a list of usernames (first column) and their corresponding user id (uid, third column) from /etc/passwd?()
You wish to kill a process with a PID of 123. Select the command which exiting.()
What is the output when the following shell script executes?() cat<;<;foobar Hello foobar foobar
Which of the following commands makes /bin/foo executable by everyone but writable only by its owner?()
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?()
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?()
Which system administration command you can use to update Id.so.cache after the installation of new shared libraries?()
What is the difference between thE.remove and thE.purge action with the dpkg command?()
You ran out of space and added a eighth disk to your SCSI-1 system. When you try to start, the system no longer boots. What is most likely the cause of this problem?()