/Shell/Bash/Linux bash test connection to host and port

Linux bash test connection to host and port

## check for tcp port ##
## need bash shell ##
(echo >/dev/tcp/{host}/{port}) &>/dev/null && echo "open" || echo "close"
(echo >/dev/udp/{host}/{port}) &>/dev/null && echo "open" || echo "close"
(echo >/dev/tcp/www.cyberciti.biz/22) &>/dev/null && echo "Open 22" || echo "Close 22"
(echo >/dev/tcp/www.cyberciti.biz/443) &>/dev/null && echo "Open 443" || echo "Close 443"

Source: cyberciti.biz

Similar codes

13 votes285 views6 answers
Add user to docker group
Shell/Bash
0 vote271 views1 answer
Pip install chart.js
Shell/Bash
0 vote277 views1 answer
Install mpfr ubuntu
Shell/Bash
1 vote315 views1 answer
Checksum command windows
Shell/Bash
10 votes334 views4 answers
Install php ubuntu 20.04
Shell/Bash
13 votes321 views6 answers
Docker on linux
Shell/Bash
0 vote297 views1 answer
Activar w10
Shell/Bash
0 vote286 views1 answer
Does Ubuntu MATE have ssh
Shell/Bash
1 vote277 views1 answer
Set pin on mcp23017 using raspberry pi shell
Shell/Bash
0 vote344 views1 answer
Docker build from github repository
Shell/Bash