Exam 2 201-500 (Q/A)

Which command is used to unload a single module currently loaded by the kernel without unloading any modules that it depends upon? (Specify the command with or without path information).

A database application requires a maximum shared memory segment (shmmax) of 2GB (2147483648 Bytes). Which configuration file should be modified to set this kernel parameter permanently? (Specify the full name of the file, including path.).

Which directory contains the system-specific udev rule files? (Specify the absolute path including the directory name).

According to the Filesystem Hierarchy Standard (FHS), what is the path to the Linux kernel source and may be a symbolic link to the real Linux source code? (Please specify the full path with no version information.).

A new kernel version needs to be compiled to use a new feature. If the old kernel configuration file is available, which make target creates a configuration file for the new kernel based on the configuration of the old kernel?.

After configuring a new kernel, what file under /usr/src/linux/ contains the configuration?.

After installing a compiled kernel, it can not find any modules that are needed to be loaded. What make target was likely missed while installing the kernel?.

Which keyword is used in the /etc/inittab file to define the SysV-init default system runlevel?.

Which file tells GRUB the paths of the filesystem partitions in both Linux format and in the GRUB syntax? (Specify the file name only with no path information).

Please enter the complete path to the main SysV init process configuration file.

What is the full path to the directory which contains the scripts (or links to the original scripts) to run while the system boots to SysV-init runlevel 2?.

The main configuration file for autofs has this entry:

What keyword is missing in the following line from /etc/fstab in order to make a USB flash device writeable by the user fred when mounted: /dev/sda1 /mnt/usbflash vfat defaults,users, _____ =fred,umask=022, 0 0 (Provide the option name only without any settings).

Which command turns an existing ext2 filesystem non-destructively into an ext3 filesystem? (Specify ONLY the command without any path or parameters.).

After a lot of write operations, the administrator want to ensure that the kernel flushes the file system buffers to disk. Which command will accomplish this? (Specify ONLY the command without any path or parameters.).

Which directory in /dev/disk/ can be used to determine the UUID of a connected hard disk?.

Consider the following /etc/fstab file: /dev/hda1 swap swap defaults 0 0 /dev/hda2 / ext2 defaults 1 1 /dev/hda3 /home ext2 defaults 1 2 none /proc proc defaults 0 0 /dev/sdb1 /media/usb0 vfat user,noauto 0 0 What is one of the possible commands that an ordinary (non-root) user can use to mount the /dev/sdb1 partition on the /media/usb0 mount point? (Please enter the command with all parameters and/or options but without any file system type options.).

Which command is used to create a ISO9660 filesystem? (Specify ONLY the command without any path or parameters.).

What command will remove a physical volume from a volume group? (Specify ONLY the command without any path or parameters.).

Which program lists information about files and network connections opened by processes? (Specify ONLY the command without any path or parameters.).

The users of the local network complain that name resolution is not fast enough. Enter the command, without the path or any options, that shows the time taken to resolve a DNS query.

Running tcpdump -nli eth1 'tcp' shows the following output: 14:41:53.694538 IP 10.1.52.145.51738 > 24.215.7.162.143: Flags [.], ack 33051, win 1002, options [nop,nop,TS val 36789130 ecr 1746004159], length 0 What is the source IP address of this packet? (Please specify the answer in digits and dots ONLY.).

According to the tcpdump output below, what is the IP address of the client host? 02:12:40.511381 IP 192.168.246.11.1045 > 192.168.246.1.22: S 3838532429:3838532429(0) win 5840 <mss 1460,sackOK,timestamp 31325740,nop,wscale 2> 02:12:40.511540 IP 192.168.246.1.22 > 192.168.246.11.1045: S 1209330085:1209330085(0) ack 383853 2430 win 5792 <mss 1460,sackOK,timestamp 11553457 3132574,nop,wscale 0> 02:12:40.511755 IP 192.168.246.11.1045 > 192.168.246.1.22: . ack 1 win 1460 <nop,nop,timestamp 3 132574 11553457> 02:12:40.515122 IP 192.168.246.1.22 > 192.168.246.11.1045: P 1:26(25) ack 1 win 5792 <nop,nop,timestamp 11553460 3132574> 02:12:40.515511 IP 192.168.246.11.1045 > 192.168.246.1.22: . ack 26 win 1460 <nop,nop,timestamp 3132578 11553460> 02:12:40.515952 IP 192.168.246.11.1045 > 192.168.246.1.22: P 1:23(22) ack 26 win 1460 <nop,nop,timestamp 3132578 11553460>.

What is the device name for the first SCSI tape drive on a system when used without automatic rewinding after each write operation? (Please specify the full path to the device.).

Which file contains the text message that is displayed after logging into the console? (Specify the full name of the file, including path.).

Which file contains the message that is displayed above the login prompt of the system console? (Specify the full name of the file, including path.).

What command discards unused blocks on a mounted file system in order to support SSD devices? (Specify ONLY the command without any path or parameters.).

What command ensures that the file systems are written to disk after a lot of write operations? (Specify ONLY the command without any path or parameters.) A.

What command is used to send messages to all users currently logged in? (Specify ONLY the command without any path or parameters.).

Which is the main configuration file for the SystemV init process? (Specify the full name of the file, including path.).

Which directory contains system-specific systemd unit files? (Specify the full path to the directory.).

Adds physical volumes to an existing volume group.

Where are the GRUB2 Legacy configuration files stored?.

Fill in the blank. The users of the local network complain that name resolution is not fast enough. Which command shows the time taken to resolve a DNS query? (Specify the command without path.).