1. Ubuntu/Debian:

apt-get install openssl cron  socat curl

2. CentOS

yum -q -y install  openssl  crontabs  socat  curl

For centos 5:

yum -q -y install openssl vixie-cron socat  curl

3. alpine

apk --no-cache add -f openssl curl socat 

4. kalilinux

apt-get -qqy install  openssl cron  socat  curl