ifconfig su-l

[user@localhost ~]$ ipconfig

bash: ipconfig: command not found

[user@localhost ~]$ su root

Password: 

[root@localhost linux]# ifocnfig

bash: ifocnfig: command not found

[root@localhost linux]# su -l

[root@localhost ~]# ifconfig

eth0      Link encap:Ethernet  HWaddr 00:0C:29:5E:90:68  

          inet addr:192.168.65.135  Bcast:192.168.65.255  Mask:255.255.255.0

          inet6 addr: fe80::20c:29ff:fe5e:9068/64 Scope:Link

          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

          RX packets:2655 errors:0 dropped:0 overruns:0 frame:0

          TX packets:819 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:1000 

          RX bytes:3615505 (3.4 MiB)  TX bytes:52981 (51.7 KiB)

lo        Link encap:Local Loopback  

          inet addr:127.0.0.1  Mask:255.0.0.0

          inet6 addr: ::1/128 Scope:Host

          UP LOOPBACK RUNNING  MTU:16436  Metric:1

          RX packets:1356 errors:0 dropped:0 overruns:0 frame:0

          TX packets:1356 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:0 

          RX bytes:4595320 (4.3 MiB)  TX bytes:4595320 (4.3 MiB)