/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

0 vote206 views1 answer
Jenkins download
Shell/Bash
0 vote217 views1 answer
Compressing files on cmd line using winrar
Shell/Bash
0 vote209 views1 answer
How to copy a Directory and its content in ubuntu
Shell/Bash
2 votes211 views2 answers
Generate key and certificate openssl
Shell/Bash
0 vote205 views1 answer
List active services ubuntu
Shell/Bash
1 vote243 views2 answers
Where are timezones located linux
Shell/Bash
12 votes212 views2 answers
Git soft reset head
Shell/Bash
0 vote200 views1 answer
Install "repo"
Shell/Bash
0 vote272 views3 answers
CocoaPods not installed
Shell/Bash
37 votes223 views5 answers
Git merge abort
Shell/Bash