Auto exit Telnet command back to prompt without human intervention ^] quit close exit code 1

Question

I\'m running telnet command on a host for a given port (which is open), it returns 0 (success).

For trying telnet manually, I type the following comman

Answer 1

Without using Expect, I guess using the HERE document (<

[vagrant@myvagrant /tmp] $ telnet_result=$(telnet `hostname` 2878 <

and for a bad/invalid/non-open port, the same gives 1 (as expected).

[vagrant@myvagrant /tmp] $ telnet_result=$(telnet `hostname` 287811111 <