使用wget在Linux中检查两个服务器之间的连接时，如何获取确切的状态代码？

Question

We have new Linux DB servers. I am writing a script to check the connectivity from our servers to new DB servers. Based on the exit status code, I wrote my script to give an output if it is connected/connection refused or connection timed out.

All our servers dont have telnet, so I have to check with wget .

Ny sample code to capture the status:

m=`echo $?`
if [ $m -eq 124 ]; then
b="Connection Timed Out"
else
if [ $m -eq 6 ]; then
b="Connected"
else
if [ $m -eq 0 ]; then
b="Connected"
else

if [ $m -eq 4 ]; then
b="Connection Refused"

But for new Linux DB servers, we are getting a different status code as 258, even though it is showing as connected:

--2019-09-18 09:53:14--  http://xxx:80/
Resolving xxxxx... xxx
Connecting to xxxx|xxxx|:80... connected.
HTTP request sent, awaiting response...  

echo $?
258

This is now misleading even though it has connectivity. Kindly suggest how we can get the exact status.

Answer 1

You could use the HTTP status codes for checks.

DB_STATUS_RESPONSE="$(wget --spider --server-response http://ipecho.net/plain 2>&1 | awk '/^  HTTP/{print $2}')"
if [ $DB_STATUS_RESPONSE -eq 200 ]; then b="Connected"; fi

$ echo $b
Connected