2016/8/19 Linux common commands: Network command, power off restart command

1. Send message to User: Write, End with CRTL + D

Write User name

2. Broadcast information: Wall

Wall [message]

3. Test network connectivity: Ping

Ping option IP Address

-C specify number of times to send

Example: Ping 192.168.1.102

4. View and set network card information: ifconfig

Ifconfig NIC name IP address

Example: Ifconfig eth0 192.168.1.102

5. View outgoing Email: Mail

Mail [user name]

6. List user information currently logged into the system in the past: last

7. Check the last logon time for a specific user: Lastlog

Example: Lastlog

Last-u 502

8. Display the path between the packets to the host: traceroute

Example: Traceroute www.wgying.net

9. Display network-related information: netstat

netstat [options]

-T TCP protocol

-U UDP protocol

-L Monitoring

-R Routing

-N Display IP address and port number

Example:

Netstat-tlun: View the port on which this machine listens

Netstat-an: View all network connections on this computer

Netstat-rn: Viewing the native routing table

10. Configure the network: Setup

11. Mount Command: Mount

Mount [-t file system] device file name mount point

Example: Mount-t iso9660/dev/sr0/mnt/cdrom

12. Shutdown or restart shutdown

shutdown [Options] Time

-C cancels the previous shutdown command

-H shutdown

-R Restart

13. Other shutdown commands: Halt, Poweroff, Init 0

14. Other Restart commands: Reboot, init 6

15. System Operating Level:

0 Turn off the machine

1 Single User

2 not fully multiuser, no NFS service included

3 Full Multi-user

4 Not assigned

5 graphical interface

6 restart

16. Check the system operating level: RunLevel

17. Modify the system default operating level: Cat/etc/inittab

Id:3:initdefault:

18. Exit the login command: Logout

2016/8/19 Linux common commands: Network command, power off restart command