lsof and ss Will Tell You Who Owns That Port
Port in use, connection stuck, file handle exhausted. Three of the most common production questions are answered by two old tools that read the kernel's own…
| Flag | Meaning |
|---|---|
-t |
TCP |
-l |
listening sockets |
-n |
numeric, no resolution |
-p |
show the owning process |
| State | Read as |
|---|---|
| ESTAB | healthy in flight |
| SYN-SENT | our connect is not being answered, path or peer down |
| SYN-RECV | we are trying to accept but the handshake stalls |
| CLOSE-WAIT | the peer closed, we have not, our code is holding the socket |
| TIME-WAIT | normal after close, only a problem in huge numbers |
Published on debugly.dev by Rohit Bhadani | Founder of Krova Cloud
