问题:单选题What is the difference between thE.remove and thE.purge action with the dpkg command?()A -remove removes the program, -purge also removes the config filesB -remove only removes the program, -purge only removes the config filesC -remove removes a pac...
Saturday, April 27, 2024
问题:单选题To allow a regular user account to mount and unmount a filesystem (for instance, a cdrom or floppy), which option need to be added to the corresponding line in /etc/fstab?()A nouidchkB alluserC userD auto...
问题:单选题The command echo $! will produce what output?()A the process id of last background commandB the exit status of the last commandC the exit status of the last background commandD the process id of the current shellE the name of the command being exe...
问题:填空题Which command (without options) would you use to display how much space is available on all mounted partitions?()...
Wednesday, March 13, 2024
问题:单选题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 myfileB :/ls-l myfileC e...
问题: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?()A tr ’/r/n’ userlist.txt newlist.txtB tr -c ’/n/r’ newlist.txt userlist.txtC tr -...
问题:单选题Which system administration command you can use to update Id.so.cache after the installation of new shared libraries?()A IdconfigB IddC libpathD newlibs...
Saturday, January 13, 2024
问题:单选题Many people like the vi text editor but the default bash command line editor recognizes emacs keystrokes. What command entered into a bash initialization file will have bash recognize vi keystrokes after login?()A history-pviB alias emacs=viC HISTCM...
问题:单选题Given the following output: prompt myapp [1]+ Stopped myapp prompt Which of the following commands will resume executing the stopped process while allowing the user to continue to type commands at the command prompt?()A bg myappB continue myapp...
问题:单选题What is the output when the following shell script executes?() cat;;foobar Hello foobar foobarA The contents of the file foobar.B HelloC No output but a file named foobar is created.D Hello foobarE Hello foobar foobar...
Thursday, December 7, 2023
问题:填空题What application can be used in place of xhost? Please enter only the name without path. Answer:()...
问题:单选题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?()A SCSI-1 supports only 8 devices including the adaptor.B SCSI-1 supports only 6 dis...
问题:单选题Which of these commands allows you to use shared libraries that are in /usr/local/lib?()A export LD_PRELOAD=/usr/local/libB export LD_LIBRARY_PATH=/usr/local/libC Idconfig /usr/local/libD Idd/usr/local/lib...
问题:填空题USB fax/modems that conform to this subclass of the Communication Device Class (CDC) vendor neutral standard are Linux compatible (answer is a 3 letter acronym).()...
问题:单选题You have run out of disk space on a partition. Which of the following would be an easy way to move data to a new partition without reconfiguring the path to the data in existing applications?()A Run ext2fs ACL.B Use a hard link.C Use a symbolic link...
问题:填空题Which program finds only files that are in your PATH?()...
问题:填空题What command with all options and/or parameter will send the signal USR1 to any executing process of program apache2?()...