Linux Basic Learning-network commands

1.write sending information to online users

Write User name
Content
Ctrl+d Save End

2.wall (write all) send information to all online users

Wall Information
Ctrl+d Save End

3.mail e-Mail

Mail User name
Title
Content
Ctrl+d Save End

Tap Mail to see if there are any messages
1 Viewing the first message
H Return to mailing list
D 1 Delete the first message
Q exit

4.last View login information for each user

Lastlog View Last Login information

Lastlog-u 500 View 500 Last login information for this user

5.traceroute show the path of the packet to the host

Traceroute www.jd.com

6.netstat

-T TCP protocol (similar to calling, need confirmation)
-u UDP protocol (similar to texting, no confirmation required)
-L Monitoring
-R Routing
-N Display IP address and port number
Netstat-tlun viewing the port on which this machine listens
Netstat-an View all network connections on this computer
Netstat-rn viewing the native routing table

7.setup graphical settings for network and firewall information

Installing the Yum install Setuptool
Additional firewalls, network configuration (yum install system-config-network-tui), etc. need to be installed separately (Yum search setup to see which packages the Setup command can manage)

8.mount

Mkdir/mnt/cdrom
Mount-t iso9660/dev/sr0 (CDROM soft link)/mnt/cdrom
-T iso9660 can omit
Umount/dev/sr0

Linux Basic Learning-network commands