sys-admin-tasks.md

RHEL Admin Tasks

Set timezone

$ sudo timedatectl set-timezone Australia/Melbourne

Setup NTP

$ yum install -y ntp
$ systemctl enable ntpd
$ systemctl start ntpd

Check NTP status

$ ntpstat 
synchronised to NTP server (103.214.220.220) at stratum 3 
   time correct to within 241 ms
   polling server every 64 s

Set hostname

$ sudo hostnamectl set-hostname build-ci

SSL

Check if cert is self signed

$ openssl s_client -showcerts -connect hostname.domain.tld:443

Curl & SSL

https://curl.haxx.se/docs/sslcerts.html