On RHEL 7.2 OS, I get following error when trying to run nc commnad
nc -z -v -w1 host port
nc: invalid option -- 'z'
Ncat: Try `--help' or man(1) ncat for more information, usage options and help. QUITTING.
Is there any alternative to it
Answer
maybe nc is a link to ncat, use the commands to check：
which nc | xargs ls -l
if the nc is linked to ncat,you should relink nc to netcat, if netcat is not installed, refer the website:http://netcat.sourceforge.net/download.php