1. Lệnh Ping : Cú pháp: Code: ping ip/host [/t][/a][/l][/n]

“The euro will raise the citizens' awareness of their belonging to one Europe more than any 
other integration step to date” - Gerhard Schroeder
IPCONFIG
 
Configure IP (
internet protocol
configuration) 
Syntax 
IPCONFIG /all Display full configuration information. 
IPCONFIG /release [adapter] 
Release the IP address for the specified adapter. 
IPCONFIG /renew [adapter] 
Renew the IP address for the specified adapter. 
IPCONFIG /flushdns Purge the DNS Resolver cache. 
IPCONFIG /registerdns Refresh all DHCP leases and re-register DNS 
names. 
IPCONFIG /displaydns Display the contents of the DNS Resolver Cache. 
IPCONFIG /showclassid adapter 
Display all the DHCP class IDs allowed for 
adapter. 
IPCONFIG /setclassid adapter [classid] 
Modify the dhcp class id. 
If the Adapter name contains spaces, use quotes: "Adapter Name" 
wildcard characters * and ? allowed, see the examples below 
The default is to display only the IP address, subnet mask and default gateway for each adapter 
bound to TCP/IP. 
For Release and Renew, if no adapter name is specified, then the IP address leases for all 
adapters bound to TCP/IP will be released or renewed. 
For Setclassid, if no ClassId is specified, then the ClassId is removed. 
Examples: 
> ipconfig ... Show information. 
> ipconfig /all ... Show detailed information 
> ipconfig /renew ... renew all adapters 
> ipconfig /renew EL* ... renew any connection that has its
name starting with EL 
> ipconfig /release *Con* ... release all matching connections, 
eg. "Local Area Connection 1" or 
"Local Area Connection 2" 
> ipconfig /setclassid "Local Area Connection" TEST
... set the DHCP class ID for the
named adapter to = TEST 
“Life is a grand adventure - or it is nothing” ~ Helen Keller 
KILL
 (
Resource kit
) 
Remove a running process from memory. 
Syntax 
KILL [option] process_id 
KILL [option] task_name 

KILL [option] window_title 
Option 
-f Force process kill 
Kill -f basically just nukes the process from existence, potentially leaking a lot of memory and 
losing any data that the process hadn't committed to disk yet. It is there for worst case scenarios 
- 
when you absolutely must end the process now, and don’t care whether proper cleanup gets 
done or not.

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