( https://www.samuraj-cz.com/clanek/cisco-ios-1-uvod-prikaz-show/ ):

( print every show commands )

sh ?

( show running config )

sh run

( show interface description )

show int des

( show ip interfaces brief )

sh ip int br

( show logging )

sh log

To changing coniguration:

conf t

( configure terminal, to return Ctr + z ) Example change some interface:

int Gi2/0/14

( some interface from show int des ) Before change print configuration interface : Mainswitch#sh run int Gi2/0/14 Building configuration…

Current configuration : 318 bytes ! interface GigabitEthernet2/0/14 description BC10 Huawei MM2 switchport access vlan 247 switchport mode access no logging event link-status no snmp trap link-status storm-control broadcast level pps 200 150 storm-control multicast level pps 100 80 spanning-tree portfast spanning-tree bpduguard disable end

After that for example change VLAN :

conf t ( enter configuration mode ) int Gi2/0/14 ( enter configuratio interface ) switchport access vlan 240 ( change VLAN access ) To change VLAN access to trunk no switchport access vlan 247 ( delete access mode conf ) no switchport mode access ( delete access mode conf ) switchport mode trunk

write ( save configuration )