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Arpith's "pure awk" approach would fail on my BSD system. The split function into an array would not work as my 'ifconfig' prints "127.0.0.1" and Arpith's "addr:127.0.0.1".

slm's "pure awk" approach (see below) would fail on my BSD system. The split function into an array would not work as my 'ifconfig' command prints "127.0.0.1" and Arpith's "addr:127.0.0.1"...

Pipe the result into sed to extract your only IP addresses:

To write a portable script you would need to keep a kind of table with these numbers. On my system (BSD) your IP addresses would be numbers 17 and 49 instead of your Linux numbers 7 and 47. Also the resulting strings look different (disregarding my local and your global ID address):

echo ${array2[16]}
192.168.0.103

echo ${array2[48]}
127.0.0.1

Pipe the result into sed to extract only your IP addresses:

To write a portable script you would need to keep a kind of table with these numbers. On my system (BSD) the IP addresses would be numbers 17 and 49 instead of your Linux numbers 7 and 47. Also the resulting strings look different (disregarding my local and Arpith's global ID address):

echo ${array2[16]}
192.168.0.103

echo ${array2[48]}
127.0.0.1

Arpith's "pure awk" approach would fail on my BSD system. The split function into an array would not work as my 'ifconfig' prints "127.0.0.1" and Arpith's "addr:127.0.0.1".

read IPETH0 IPLO <<< $(ifconfig |\
 awk '/inet[[:space:]]/ { split($2,a,":"); print a[2]}')

I presume that you know for each of your commands which part of the command's return you want to store.

In your example this would be words number 7 and 47.

Do it like this (note the back ticks around your command ifconfig):

array=(`ifconfig`)

Show all elements of this array:

echo ${array[@]}

which gives you this result:

eth0 Link encap:Ethernet HWaddr 30:F7:0D:6D:34:CA inet addr:10.106.145.12 Bcast:10.106.145.255 Mask:255.255.255.0 inet6 addr: fe80::32f7:dff:fe6d:34ca/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:1104666 errors:0 dropped:0 overruns:0 frame:0 TX packets:2171 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:444437904 (423.8 MiB) TX bytes:238380 (232.7 KiB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.255.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:15900 errors:0 dropped:0 overruns:0 frame:0 TX packets:15900 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:467306 (456.3 KiB) TX bytes:467306 (456.3 KiB)

Show specific words:

echo ${array[6]} ${array[46]}
addr:10.106.145.12 addr:127.0.0.1

Pipe the result into sed to extract your IP addresses:

echo ${array[6]} ${array[46]} | sed 's/addr://g'
10.106.145.12 127.0.0.1

Just use these echo calls as variables in your shell script.

Please note that array elements are being counted from 0. Therefore your word number 7 would be referred to as "${array[6]}".

The array indexes are positive integers. So you can do all sorts of calculations in your shell script to pick specific words (like ranges or for-loops) ...

To write a portable script you would need to keep a kind of table with these numbers. On my system (BSD) your IP addresses would be numbers 17 and 49 instead of your Linux numbers 7 and 47. Also the resulting strings look different (disregarding my local and your global ID address):

echo ${array2[16]}
192.168.0.103

echo ${array2[48]}
127.0.0.1

HTH

bernie

I presume that you know for each of your commands which part of the command's return you want to store.

In your example this would be words number 7 and 47.

Do it like this (note the back ticks around your command ifconfig):

array=(`ifconfig`)

Show all elements of this array:

echo ${array[@]}
eth0 Link encap:Ethernet HWaddr 30:F7:0D:6D:34:CA inet addr:10.106.145.12 Bcast:10.106.145.255 Mask:255.255.255.0 inet6 addr: fe80::32f7:dff:fe6d:34ca/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:1104666 errors:0 dropped:0 overruns:0 frame:0 TX packets:2171 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:444437904 (423.8 MiB) TX bytes:238380 (232.7 KiB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.255.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:15900 errors:0 dropped:0 overruns:0 frame:0 TX packets:15900 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:467306 (456.3 KiB) TX bytes:467306 (456.3 KiB)

Show specific words:

echo ${array[6]} ${array[46]}
addr:10.106.145.12 addr:127.0.0.1

Pipe the result into sed to extract your only IP addresses:

echo ${array[6]} ${array[46]} | sed 's/addr://g'
10.106.145.12 127.0.0.1

Using Arpith's nifty approach with 'read' here is the flexible answer.

read IPETH0 IPLO <<< $(echo ${array[6]} ${array[46]} |\
sed 's/addr://g')
echo $IPETH0 $IPLO
10.106.145.12 127.0.0.1

Please note that array elements are being counted from 0. Therefore your word number 7 would be referred to as "${array[6]}".

The array indexes are positive integers. So you can do all sorts of calculations in your shell script to pick specific words (like ranges or for-loops) ...

To write a portable script you would need to keep a kind of table with these numbers. On my system (BSD) your IP addresses would be numbers 17 and 49 instead of your Linux numbers 7 and 47. Also the resulting strings look different (disregarding my local and your global ID address):

echo ${array2[16]}
192.168.0.103

echo ${array2[48]}
127.0.0.1

HTH

bernie