xitab
rmitab
chitab
delitab
第1题：
Which of the following dbx commands should be used to obtain a stack trace from a coredump file?（）
第2题：
Which of the following commands should be used to show DNS information？（）
第3题：
A.xitab
B.rmitab
C.chitab
D.delitab
第4题：
A system administrator has added a new port entry in /etc/services for a new application to be tested. Which of the following commands should be used to activate this port？（）
第5题：
Because of changes in an application environment， the /etc/inittab file needs to be modified. Which of the following commands would be used to accomplish this in a supported manner（）
第6题：
Which of the following commands is used to delete an empty directory?（）
第7题：
When line errors occur, which of the following commands should be sued to cause init to re-read the /etc/inittab file if init stops respawning the getty process on a TTY?（）
第8题：
A.alog
B.telinit
C.sysinit
D.cfgmgr
第9题：
Which of the following commands should be used to delete an entry from the /etc/inittab?（）
第10题：
Which of the following commands should be used to report statistics on network protocols used by the system？（）