Shulou(Shulou.com)06/02 Report--

The market scale of cloud computing industry is growing rapidly, and the demand for talents is surging. Relevant cloud computing enterprises increase investment in core technologies and improve customer services, no matter from the technical level, operator level or integration and service provision level, there is a huge demand for talents. Next, I would like to share with you the cloud computing interview questions for high-paying jobs. Cloud computing operation and maintenance engineers must have a good collection.

What is the 1.osi seven-tier reference model?

Application layer presentation layer session layer transport layer network layer data link layer physical layer

At which layer does the 2.udp protocol work? On which floor does ping work?

UDP works at the transport layer. Ping works at the network layer.

What are the commands used to detect traffic in a 3.linux system? (more than four)

Ping tracerroute

What are the commands for viewing hardware resources (more than five) and processes in a 4.linux system?

Lspci | grep-I vga / / View video card information

Cat / proc/cpuinfo / / View CPU information

Dmesg | grep sda / / View hard disk information

Cat / proc/meminfo / / View memory information

Dmesg | grep-I eth / / View Nic information

Ps a / / displays all programs under the current terminal, including those of other users.

5. How to kill the dead process? (more than three articles)

This problem is generally not needed.

6. What is the command to view cpu information?

Cat / proc/cpuinfo / / View CPU information

7. What are the levels of monitoring parameters? (more than 6)

8. Write an iptables command that allows the external network to access the internal server

Iptables-I INPUT-I lo-j ACCEPT

Iptables-I INPUT-s A.B.C.D-j ACCEPT

Iptables-P INPUT DROP

What are several roles in the 9.exchange mail server? Which role needs to be installed separately?

Server role: mailbox server client access server unified messaging server central transport server edge transport server

Edge Transport server needs to be installed separately

What is the difference between 10.rat5.5 and 6.0in use (at least three items)

11. What are the protocols between upd and tcp? And write down the meaning of the job? (at least five or more per agreement)

UDP protocol (optional 5):

RIP dynamic routing protocol port 520

DNS Domain name Resolution Protocol port number 53

TFTP trivial File transfer Protocol port number 69

DHCP dynamic host configuration protocol port number 67 68

NTP Network time Protocol Port number 123

TCP protocol (optional 5):

HTTP Hypertext transfer Protocol port 80

FTP File transfer Protocol port 20 21

Telnet remote Control Protocol Port 23

BGP Border Gateway routing Protocol Port number 179

SMTP simple Mail transfer Protocol port number 25

POP3 Post Office Protocol 3 Port number 110

What is the full name of 12.TCP IP?

TCP: transmission Control Protocol

IP (Internet Protocol): network interconnection protocol

What is the full name of 13.UDP?

UDP (User Datagram Protocol): the Chinese name is the user packet protocol.

14. What is the function of WLAN?

WLAN (Wireless Local area Network) is a technology that uses wireless technology to realize fast access to Ethernet.

15. Does VM support hardware platform virtualization?

Support

Does 16.VM support linux systems?

Support (except for IBM's aix system)

17. The company has an employee, the web page can not be opened, let you solve, please explain the solution process and solution ideas?

First of all, check whether the connectivity of the network is normal, you can use the Ping command to test, if the network is not connected, solve the network connectivity first.

Problems (detection of network card, network cable, switch port routing configuration, etc.); if the network connection is normal, consider

Whether the browser is normal, whether the DNS is correct, whether there is any firewall blocking, etc.)

How to achieve high availability of 18.HA?

HA has the following categories:

High network availability: network high availability is achieved by matching redundant network devices to achieve redundancy of network devices.

A highly available purpose.

Server high availability: it is mainly implemented by server cluster software or high availability software.

High availability of storage: high availability of storage using software or hardware technology. When one storage fails, the other spare storage can be switched quickly to achieve the purpose of storage without downtime.

Common 19.linux commands? (at least 8)

View system information

Processor Architecture of arch display Machine (1)

Processor Architecture of uname-m display Machine (2)

Uname-r shows the kernel version in use

Dmidecode-Q display hardware system components-(SMBIOS / DMI)

Hdparm-I / dev/hda lists the architectural features of a disk

Hdparm-tT / dev/sda performs testable read operations on disk

Cat / proc/cpuinfo displays the information of CPU info

Cat / proc/interrupts display interrupt

Cat / proc/meminfo verifies memory usage

Cat / proc/swaps shows which swap is used

Cat / proc/version shows the kernel version

Cat / proc/net/dev display Network Adapter and Statistics

Cat / proc/mounts displays the loaded file system

Lspci-tv lists PCI devices

Lsusb-tv display USB device

Date displays the system date

Cal 2007 displays the calendar for 2007

Date 041217002007.00 sets the date and time-month, day, hour, year. Second

Clock-w saves time changes to BIOS

Shutdown (shutdown, restart and logout of the system)

Shutdown-h now shuts down the system (1)

Init 0 shuts down the system (2)

Telinit 0 shuts down the system (3)

Shutdown-h hours:minutes & shuts down the system at the scheduled time

Shutdown-c cancels shutting down the system at the scheduled time

Shutdown-r now restart (1)

Reboot restart (2)

Logout logout

Mount a file system

Mount / dev/hda2 / mnt/hda2 mount a disk called hda2-make sure the directory'/ mnt/hda2' already exists

Umount / dev/hda2 unmount a disk called hda2-exit from mount point'/ mnt/hda2' first

Fuser-km / mnt/hda2 force uninstall when the device is busy

Umount-n / mnt/hda2 runs the uninstall operation without writing to the / etc/mtab file-useful when the file is read-only or when the disk is full

Mount / dev/fd0 / mnt/floppy mount a floppy disk

Mount / dev/cdrom / mnt/cdrom mount a cdrom or dvdrom

Mount / dev/hdc / mnt/cdrecorder mount a cdrw or dvdrom

Mount / dev/hdb / mnt/cdrecorder mount a cdrw or dvdrom

Mount-o loop file.iso / mnt/cdrom mounts a file or ISO image file

Mount-t vfat / dev/hda5 / mnt/hda5 mounts a Windows FAT32 file system

Mount / dev/sda1 / mnt/usbdisk mounts a usb shortcut or flash memory device

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.