ミッション
1000台分の接続テストがしたい。
シェルスクリプト
sample.sh
#!/bin/sh
loop=1
for adr3 in $(seq 30 39)
do
for adr4 in $(seq 0 99)
do
echo $loop $adr3 $adr4
ifconfig eth0:$loop 172.21.$adr3.$adr4 netmask 255.255.0.0 up
loop=`expr $loop + 1`
done
done
確認
$ ip address show
：
：
inet 172.21.30.0/16 brd 172.21.255.255 scope global eth0:1
inet 172.21.30.1/16 brd 172.21.255.255 scope global secondary eth0:2
inet 172.21.30.2/16 brd 172.21.255.255 scope global secondary eth0:3
inet 172.21.30.3/16 brd 172.21.255.255 scope global secondary eth0:4
inet 172.21.30.4/16 brd 172.21.255.255 scope global secondary eth0:5
inet 172.21.30.5/16 brd 172.21.255.255 scope global secondary eth0:6
inet 172.21.30.6/16 brd 172.21.255.255 scope global secondary eth0:7
inet 172.21.30.7/16 brd 172.21.255.255 scope global secondary eth0:8
inet 172.21.30.8/16 brd 172.21.255.255 scope global secondary eth0:9
inet 172.21.30.9/16 brd 172.21.255.255 scope global secondary eth0:10
inet 172.21.30.10/16 brd 172.21.255.255 scope global secondary eth0:11
inet 172.21.30.11/16 brd 172.21.255.255 scope global secondary eth0:12
inet 172.21.30.12/16 brd 172.21.255.255 scope global secondary eth0:13
：
：