Linux 獲取當前IP

linux:

lc_all=c ifconfig

|grep
'inet addr:'
|grep
-v'127.0.0.1'
|cut -d: -f2
|awk
''lc_all=c 英文輸出 
ifconfig 輸出ip相關資訊

# lc_all=c ifconfig

eth0 link encap:ethernet hwaddr c2:ac:c3:e7:4a:33inet addr:192.168.1.247 bcast:0.0.0.0 mask:255.255.255.0up broadcast running multicast mtu:1500 metric:1rx packets:84080 errors:0 dropped:80overruns:0 frame:0
tx packets:3595264errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000rx bytes:14627750 (13.9 mib) tx bytes:417627051 (398.2mib)
interrupt:27lo link encap:local loopback 
inet addr:127.0.0.1 mask:255.0.0.0up loopback running mtu:16436 metric:1rx packets:127errors:0 dropped:0 overruns:0 frame:0
tx packets:127errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0 
rx bytes:18079 (17.6 kib) tx bytes:18079 (17.6 kib)

grep 

'inet addr:' 擷取包含ip的那兩行

# lc_all=c ifconfig|grep "inet addr:"

inet addr:192.168.1.247 bcast:0.0.0.0 mask:255.255.255.0inet addr:127.0.0.1 mask:255.0.0.0

grep

-v'127.0.0.1' 去掉本地指向的那行

# lc_all=c ifconfig|grep "inet addr:"|grep -v "127.0.0.1"

inet addr:192.168.1.247 bcast:0.0.0.0 mask:255.255.255.0

cut -d: 

-f2 -d: 以:分割字串 -f2：取第二組資料

# lc_all=c ifconfig|grep "inet addr:"|grep -v "127.0.0.1"|cut -d: -f2

192.168.1.247 bcast

awk 

'' $1 表示預設以空格分割的第一組 同理 $@表示第二組

# lc_all=c ifconfig|grep "inet addr:"|grep -v "127.0.0.1"|cut -d: -f2|awk ''

192.168.1.247
# lc_all=c ifconfig|grep "inet addr:"|grep -v "127.0.0.1"|cut -d: -f2|awk ''
bcast

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