Linux learning notes 7.7

Useradduser & nbsp; add passwduser & nbsp; add password ll & nbsp; & nbsp; view wenjianll-d/home & nbsp; view the current file ll-a useradd user to add users
Passwd user: Add password for user
Ll view wenjian
Ll-d/home to view the current file
Ll-a/home/user view implicit files (such as user variable files and launch scripts)
Ll-l/view/Directory
Su-switch to administrator
Ifconfig
Vim/etc/sysconfig/network-script/ifcfg-eth0 modify network properties
Vim/etc/resolv. conf DNS client configuration file
/Etc/init. d/network restart the network service
Ifconfig eth0 192.168.0.1 temporary IP address configuration
Chkconfig iptables -- list view firewall information
Service iptables stop | start to disable or restart the firewall
Cat/etc/sysconfig/network cat displays the most basic network information (system startup information)
Cat/etc/sysconfig/network-scripts system startup initialization information
Cat/etc/hosts host name ing ip hosts file
Protocols used by cat/etc/protocols hosts
Cat/etc/serverces services with different ports on the host
Route add defaut gw 192.168.1.1 add default route
Route add-host 192.168.1.2 dev eth0 add route to host method
Route add-net 192.168.0.0 netmask route 255.255.0 eth0 add to network routing method
Route del-net 192.168.0.0 netmask route 255.255.0 eth0 route deletion method
Netstat view network connections
Netstat-I Displays network interface status information
Netstat-lpe: displays information about monitoring sockets and using sockets.
Netstar-nr pure address display kernel route information
Netstat-t displays the tcp connection status
Netstat-u displays udp connection status
Hostname redhat name
Hostname display name
Arp viewing arp cache
Arp-s 192.168.1.1 00: 50: ba: 68: 84: c3 add a static IP address to bind the mac address