Unix面试题（英文 附答案）2-4
UNIX
61，What file contains a listing of default file systems?A fstab
62，What command is used to mount a file system read-only? C mount -r 63, You want all the file systems listed in fstab to have quotas. What command would allow you to do this without having to enable each one separately?
A quotaon -a
64, What command would allow you to edit an existing quota? D edquota
65,Which of the following commands can be used to change the owner of a particular file? C chown
66，When setting file permissions using octal settings, what value represents read access? D 4
67，When setting file permissions using octal settings, what value represents write access? C 2
68，When setting file permissions using octal settings, what value represents execute access? C 1
69，When setting file permissions using octal settings, what value represents read and write access? B 6
70, When setting file permissions using octal settings, what value represents read, write, and execute access?A 7
71，When setting file permissions using octal settings, what value represents read and execute access?A 5
72，What is the purpose of a umask? D determine default file permissions
73，There is a file with the following permissions: -rw-rw-r– What rights does the owner have? C read-write
74，There is a file with the following permissions: -rw-rw-r– What rights does the owner’s group have? C read-write
75, There is a file with the following permissions: -rw-rw-r– What rights do users other than the owner and the owner’s group have? A read
76, There is a file with the following permissions: -rw-r–r– What rights does the owner have?A read-write
77, There is a file with the following permissions: -rw-r–r– What rights does the owner’s group have? B read
78，What command can be used to list the modules that are currently resident on the system? D lsmod
79，The root user always has a UID of ______A 0
80，Your system has a default mode of 666. You specify a umask value of 022. What will be the default permissions? C 644
