Unix面试题（英文 附答案）1-7

86. fork 系统调用能：把当前进程复制一份，产生一个新进程
87. Which files are used to configure TCP Wrappers? ：/etc/hosts.allow and /etc/hosts.deny
88. /boot目录用来存放Linux启动时所需要的一些数据和文件，如果该目录被破坏，系统将不能够启动，缺省情况下该目录应能由普通用户读 写。：错误
89. C语言是UNIX环境中唯一能使用的语言。：错误
90. MD5 passwords are enabled by default on Linux installations. How many characters can a user's password be when using MD5 passwords ?：256
91. What program can be used to test the smb.conf file for errors?
A. mount
B. test
C. samba –checkparm
D. testparm
E. smbfs
—————— Explain —————-
p6:Explanation: the testparm program parses the smb.conf file and reports any errors. If you make a typo this program is likely to find it.
92. 用ps x命令会看到下面的输出：请问init后面的3是什么意思？说明init的状态值，他可能是0-6。
PID TTY STAT  TIME COMMAND
x  ?  S    0:01 init [3]
93. What file contains the configuration for BIND?
A. /etc/bind.conf
B. /etc/named.conf
C. /etc/dns.conf
D. /var/named/bind.conf
—————— Explain —————-
p11:Explanation: BIND (the Berkely Internet Name Daemon) which is a DNS server is configured in /etc/named.conf.
94. You have created a /home/projectx directory with the owner of projectx and a group of projectx. How can you set its permissions so that all files created in this directory are owned by the projectx group? ：: chmod g+s /home/projectx
95. You have created a /home/projectfoo directory. How can you change its group ownership to the projectfoo group? ：chgrp projectfoo /home/projectfoo
96. Which options to chmod allow read access to all but only allow write and execute access to the owner?
：chmod 744 filename
97. What command allows you to switch from using Gnome to using KDE? ：Switchdesk
98. If you want to allow X-Windows programs from hostB to run on the display on hostA what would you need to do?
A. run xhost +hostB on hostA.
B. run xhost +hostA on hostB.
C. run xhost + on hostA.
D. run xhost + on hostB.
E. just set the DISPLAY environment variable and it will work.
—————— Explain —————-
p40:Explanation: You want programs from hostB to display on hostA. So you must tell hostA to allow Xclients from hostB. Hence A is correct. The xhost + command is too broad and allows anyone to connect to your X-server.
99. Who is the individual most responsible for the development of Linux ?：Linus Torvalds
100. alias 命令的功能是:指定命令的别名