在继续使用 bash 之前等待网络链接建立
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Waiting for network link to be up before continuing in bash
提问by user1527227
Is there a way to check for successful network interface link for multiple interfaces in a bash script before continuing?
在继续之前，有没有办法在 bash 脚本中检查多个接口的成功网络接口链接？
Something like:
就像是：
eth0 eth1 eth2 eth3 network interfaces are brought up
Wait for link detection on all 4 interfaces
Proceed
回答by jimm-cl
You can check if the network interfaces' names appear after running ifconfig -s.
您可以检查运行后是否出现网络接口名称ifconfig -s。
Something like:
就像是：
if [ $( ifconfig -s | grep eth0 ) ]; then echo "eth0 is up!"
Check this linkfor more details.
查看此链接了解更多详情。
To make this test ongoing, you can do something like what @jm666 said:
要进行此测试，您可以执行类似于@jm666 所说的操作：
while ! ping -c 1 -W 1 1.2.3.4; do
echo "Waiting for 1.2.3.4 - network interface might be down..."
sleep 1
done
