Ubuntu 18.04 apt install slurm-wlm munge libslrum-dev mpich ntp mpich libpmi0 libpmix-dev ##Configure NTP Server on Head Node On the head node, `spearmint.cse.unr.edu`, install ntp. ```lang=bash $ apt install ntp ``` Head over to `/etc/ntp.conf` and replace the following lines ```lang=bash pool 0.ubuntu.pool.ntp.org iburst pool 1.ubuntu.pool.ntp.org iburst pool 2.ubuntu.pool.ntp.org iburst pool 3.ubuntu.pool.ntp.org iburst ``` with ```lang=bash pool 0.us.pool.ntp.org iburst pool 1.us.pool.ntp.org iburst pool 2.us.pool.ntp.org iburst pool 3.us.pool.ntp.org iburst ``` Restart the NTP server after saving the changes. ```lang=bash $ service ntp restart ``` Real quick, open the NTP UDP port `123` for incoming connections if there's an UFW firewall enabled. ```lang=bash $ ufw allow from any to any port 123 proto udp ``` --- ##Configure NTP Server on Client Nodes On the client nodes, `spearmint-0.cse.unr.edu`, make sure ntpdate is installed. ```lang=bash $ apt install ntpdate ``` Next, it's important to manually sync time with all of the servers. references https://linuxconfig.org/ntp-server-configuration-on-ubuntu-18-04-bionic-beaver-linux

Be sure that the following are installed on the nodes: ```lang=bash $ apt install slurm-wlm munge libslrum-dev mpich ntp mpich libpmi0 libpmix-dev ``` ##Configure NTP Server on Head Node On the head node, `spearmint.cse.unr.edu`, install ntp. ```lang=bash $ apt install ntp ``` Head over to `/etc/ntp.conf` and replace the following lines ```lang=bash pool 0.ubuntu.pool.ntp.org iburst pool 1.ubuntu.pool.ntp.org iburst pool 2.ubuntu.pool.ntp.org iburst pool 3.ubuntu.pool.ntp.org iburst ``` with ```lang=bash pool 0.us.pool.ntp.org iburst pool 1.us.pool.ntp.org iburst pool 2.us.pool.ntp.org iburst pool 3.us.pool.ntp.org iburst ``` Restart the NTP server after saving the changes. ```lang=bash $ service ntp restart ``` Real quick, open the NTP UDP port `123` for incoming connections if there's an UFW firewall enabled. ```lang=bash $ ufw allow from any to any port 123 proto udp ``` --- ##Configure NTP Server on Client Nodes On the client nodes, `spearmint-0.cse.unr.edu`, make sure ntpdate is installed. ```lang=bash $ apt install ntpdate ntp ``` Next, it's important to manually sync time with all of the servers. ```lang=bash $ ntpdate spearmint ``` --- ##Munge Keys Create the munge keys on the head node and scp that file over to the client nodes. ```lang=bash #on spearmint.cse.unr.edu $ munged $ systemctl status munge #make sure that it is running $ scp /etc/munge/munge.key cse-admin@spearmint-1.cse.unr.edu:/etc/munge/munge.key ``` references https://linuxconfig.org/ntp-server-configuration-on-ubuntu-18-04-bionic-beaver-linux

Be sure that the following are installed on the nodes: Ubuntu 18.04```lang=bash $ apt install slurm-wlm munge libslrum-dev mpich ntp mpich libpmi0 libpmix-dev ``` ##Configure NTP Server on Head Node On the head node, `spearmint.cse.unr.edu`, install ntp. ```lang=bash $ apt install ntp ``` Head over to `/etc/ntp.conf` and replace the following lines ```lang=bash pool 0.ubuntu.pool.ntp.org iburst pool 1.ubuntu.pool.ntp.org iburst pool 2.ubuntu.pool.ntp.org iburst pool 3.ubuntu.pool.ntp.org iburst ``` with ```lang=bash pool 0.us.pool.ntp.org iburst pool 1.us.pool.ntp.org iburst pool 2.us.pool.ntp.org iburst pool 3.us.pool.ntp.org iburst ``` Restart the NTP server after saving the changes. ```lang=bash $ service ntp restart ``` Real quick, open the NTP UDP port `123` for incoming connections if there's an UFW firewall enabled. ```lang=bash $ ufw allow from any to any port 123 proto udp ``` --- ##Configure NTP Server on Client Nodes On the client nodes, `spearmint-0.cse.unr.edu`, make sure ntpdate is installed. ```lang=bash $ apt install ntpdate ntp ``` Next, it's important to manually sync time with all of the servers. ```lang=bash $ ntpdate spearmint ``` --- ##Munge Keys Create the munge keys on the head node and scp that file over to the client nodes. ```lang=bash #on spearmint.cse.unr.edu $ munged $ systemctl status munge #make sure that it is running $ scp /etc/munge/munge.key cse-admin@spearmint-1.cse.unr.edu:/etc/munge/munge.key ``` references https://linuxconfig.org/ntp-server-configuration-on-ubuntu-18-04-bionic-beaver-linux