Cent OS updates

linux/centos/elxr/setup.sh

+# To add New User
+# sudo useradd {{newuser}}
+# sudo passwd {{newuser}}
+
+# Add the User to the sudoers File
+# sudo visudo
+# In the file opened add to the bottom and saveit
+# {{newuser}} ALL=(ALL) ALL
+# usermod -aG wheel {{newuser}}
+# Switch to the new user
+# su - {{newuser}}
+
+# SHORTCUTS #
+# To get task manager run htop
+# To check no of CPU's -> nproc or lscpu --all --extended
+# To check disk space df -h
+# TO CHECK UP Link speed
+# nmcli -t -f NAME c show --active
+# sudo ethtool {devicename}
+
+
 # To Fix the mirrorlist issue in CentOS, make the following changes in the three .repo files
-# (CentOS-AppStream.repo, CentOS-Base.repo, CentOS-Extras.repo) in the directory /etc/yum.repos.d/
-# Open these files with sudo
-# comment out mirrorlist line
-# change baseurl like to:
-# baseurl=http://vault.centos.org/$contentdir/$releasever/extras/$basearch/os/
+# change current directory to /etc/yum.repos.d/
+# Open these three (CentOS-AppStream.repo, CentOS-Base.repo, CentOS-Extras.repo) files in nano with sudo and make the below two changes.
+  # comment out mirrorlist line, mirrorlist=http:/{{}}
+  # Uncomment the baseurl line and change http://mirror.centos.org{{}} to http://vault.centos.org{{}}
 
 
 # Download steps
 sudo yum install npm
 
 
+sudo firewall-cmd --zone=public --add-port=9209/tcp --permanent  # FOR pm2 metrics
 sudo firewall-cmd --zone=public --add-port=8081/tcp --permanent
 # have to add all the ports to firewall. in pm2 when we run ecosystem file, that prints these commands
 sudo firewall-cmd --reload
 sudo npm install -g pm2
 npm install -g ember-cli
 npm install -g loopback-cli
-
+pm2 install pm2-metrics
 #production A SETUP
 mkdir chess
 cd chess