Unix面试题（英文 附答案）2-4
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