登入Linux系统后希望重新加载/etc/fstab文件中的所有条目,我们可以以root身份执行()命令。
A.mount-a
B.mount-c
C.mount-b
D.mount-d
A.mount-a
B.mount-c
C.mount-b
D.mount-d
阅读以下说明,回答问题1至问题8,将解答填入答题纸对应的解答栏内。
【说明】
Linux系统开机引导时首先启动内核,由内核检查和初始化硬件设备,载入设备的驱动程序模块,安装root文件系统,然后内核将启动一个名为init的进程。在init运行完成并启动其它必要的后续进程后,系统开始运行,引导过程结束。init进程启动时需要读取inittab配置文件,该文件确定init在系统启动和关机时的工作特性。典型的inittab文件内容见以下清单:
#
# inittab This file describes how the INIT process should set up
# the system in a certain run-level.
#
# Default runlevel. The runlevels used by RIdS are:
# 0 - halt (Do NOT set initdefault to this)
# 1 - Single user mode
# 2 - Multiuser, without NFS (The same as 3, ifyou do not have networking)
# 3 - Full multiuser mode
# 4 - unused
# 5 -X11
# 6 - reboot (Do NOT set initdefault to this)
#
id:5:initdefault:
# System initialization.
si::sysinit:/et~/rc.d/rc.sysinit
10:0:wait:/etc/rc.d/rc 0
11:1 :wait:/etc/rc.d/rc 1
12:2:wait:/etc/rc.d/rc 2
13:3 :wait'/ete/rc.d/re 3
14:4:wait:/etc/rc.d/rc 4
15:5:wait:/etc/rc.d/rc 5
16:6:wait:/et~/rc.d/rc 6
# Trap CTRL-ALT-DELETE
ca::ctrlaltdel:/sbin/shutdown -t3 -r now
# When our UPS tells us power has failed, assume we have a few minutes
# of power left. Schedule a shutdown for 2 minutes from now.
# This does, of course, assume you have powerd installed and your
# UPS connected and working correctly.
pf::poweffail:/sbin/shutdown -f-h +2 "Power Failure System Shutting Down"
# If power Was restored before the shutdoWn kicked in, cancel it.
pr: 12345:powerokwait:/sbin/shutdown-c "Power Restored; Shutdown Cancelled"
# Run gettys in standard mnlevels
1:2345:respawn:/sbin/mingetty tty 1
2:2345:respawn:/sbin/mingetty tty2
3:2345 :respawn:/sbin/mingetty tty3
4:2345:respawn:/sbin/mingetty try4
5:2345:respawn:/sbin/mingetty try5
6:2345:respawn:/sbin/mingetty try6
# Run xdm in runlevel 5
x:5 :respawn:/etc/X11/prefdm -nodaemon
【问题1】(2分)
启动init进程前,不需要经过___(1)___步骤。
A.LILO加载内核 B.检测内存 C.加载文件系统 D.启动网络支持
【问题2】(2分)
inittab文件存放在___(2)___目录中。
A./etc B./boot C./sbin D./root
【问题3】(2分)
Linix系统运行级别3 工作在___(3)___状态。
A.单用户字符模式 B.多用户字符模式
C.单用户图形模式 D.多用户图形模式
【问题4】(2分)
根据说明中inittab文件的内容,系统引导成功后,工作在___(4)___状态。
A.单用户字符模式 B.多用户字符模式
C.单用户图形模式 D.多用户图形模式
【问题5】(2分)
在系统控制台,___(5)___用Ctrl+Alt+Delete组合键来重新引导服务器。
A.允许 B.不允许
【问题6】(2分)
假设root用户执行“init0”命令,系统将会___(6)___。
A.暂停 B.关机 C.重新启动 D.初始化
【问题7】(2分)
root用户执行“psauxlgrepinit”’命令,得到init的PID是___(7)___。
A.0 B.1 C.2 D.3
【问题8】(1分)
根据上述inittab文件的内容,系统在引导过程结束前,至少还要执行___(8)___进程。
A. rc.sysinit
B. rc.sysinit 和 rc 5
C. rc.sysinit, rc0, rcl, rc2, rc3, re4, rc5和qlrc6
D. rc0, rcl, rc2, rc3, rc4, rc5和glrc6
阅读以下说明,回答问题1至问题8。
[说明]
Linux 系统开机引导时首先启动内核,由内核检查和初始化硬件设备,载入设备的驱动程序模块,安装root文件系统,然后内核将启动一个名为init的进程。在init运行完成并启动其他必要的后续进程后,系统开始运行,引导过程结束。init进程启动时需要读取inittab配置文件,该文件确定init在系统启动和关机时的工作特性。典型的inittab文件内容见以下清单:
inittab This file describes how the INIT process should set up
the system in a certain nm-level.
Default nmlevel. The nmlevels used by RHS are:
0 - halt (Do NOT set initdefault to this )
1 - Single user mode
2-Multiuser, without NFS (The same as 3, if you do not have networking)
3 - Full multiuser mode
4 - unused
5-Xll
6 - reboot (Do NOT set initdefault to this )
id:5:initdefault:
System initialization.
si::sysinit:/etc/rc.d/rc.sysinit
10:0:wait:/etc/rc.d/rc 0
11:1:wait:/ete/rc.d/rc 1
12:2:wait:/etc/rc.d/rc 2
13:3:wait:/etc/rc,d/rc 3
14:4:wait:/etc/rc.d/rc 4
15:5:wait:/etc/rc.d/rc 5
16:6:wait:/etc/rc.d/rc 6
Trap CTRL-ALT-DELETE
ea::ctrlaltdel:/sbin/shutdown -t3 -r now
When our UPS tells us power has failed, assume we have a few minutes
of power left. Schedule a shutdown for 2 minutes from now.
This does, of course, assume you have powerd installed and your
UPS connected and working correctly.
pf::power fail:/sbin/shutdown -f-h +2 "Power Failure: System Shutting Down"
If power was restored before the shutdown kicked in, cancel it.
pr: 12345:powerokwait:/sbin/shutdown-c "Power Restored; Shutdown Cancelled"
Run gettys in standard rtmlevels
1:2345 :respawn:/sbin/mingetty tty1
2:2345:respawn:/sbin/mingetty try2
3:2345 :respawn:/sbin/mingetty try3
4:2345:respawn:/sbin/mingetty tty4
5:2345:respawn:/sbin/mingetty tty5
6:2345 :respawn:/sbin/mingetty tty6
Run xdm in runlevel 5
x:5:respawn:/etc/X 11/prefdm -nodaemon
启动init进程前,不需要经过______步骤。
A.LIIO加载内核 B.检测内存
C.加载文件系统 D.启动网络支持
● 在Linux系统中,用户组加密后的口令存储在 (33) 文件中。
(33)
A. /etc/passwd
B. /etc/shadow
C. /etc/group
D. /etc/shells
若用户现有网卡,编辑“com.modules”文件如下:
alias eth0 3c509
alias eth1 3c509
options 3c509 io=0x300,0x320
请解释这三条语句。
A./etc/dhcpd.conf
B. /etc/dhcp.conf
C. /etc/dhcpd.config
D. /etc/dhcp.config
Linux系统中,默认安装DHCP服务的配置文件为______。
A./etC/DhCpD.Conf
B./etC/DhCp.Conf
C./etC/DhCpD.Config
D./etC/DhCp.Config
Linux系统中在下列(59)文件中指定了网络路由信息。
A./etc/network
B./etc/reso1v.conf
C./etc/host.conf
D./etc/hosts
A./etc/inet.config
B./etc/state/inetd.conf
C./etc/inetd.conf
D./etc/sbin/inet.config
A./etc/group
B. /etc/userinfo
C. /etc/shadow
D. /etc/profie
●在Linux系统中,对于(63) 文件中列出的Linux分区,系统启动时会自动挂载。
(63)
A./etc/profile
B./etc/disk
C./etc/fstab
D./etc/hosts