/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

11 votes92 views3 answers
Git log one line
Shell/Bash
0 vote78 views1 answer
How to show two table side by side in github readme
Shell/Bash
1 vote75 views1 answer
How to know fedora version
Shell/Bash
0 vote73 views2 answers
Ubuntu openvpn client
Shell/Bash
0 vote68 views1 answer
Add mongodb path to bashrc
Shell/Bash
32 votes79 views6 answers
Sed replace in file
Shell/Bash
0 vote74 views1 answer
Npm install tough-cookie
Shell/Bash
2 votes91 views1 answer
Python3.8 install pip
Shell/Bash
0 vote32 views3 answers
Install kvm in kali linux
Shell/Bash
0 vote72 views1 answer
Grep on mac os terminal
Shell/Bash