no update before install

docs/install_centos_6.sh

@@ -4,7 +4,6 @@
 
 sudo -E systemctl stop firewalld
 
-sudo -E yum update -y
 sudo -E yum install epel-release yum-utils -y
 sudo -E rpm --import "http://keyserver.ubuntu.com/pks/lookup?op=get&search=0x3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF"
 curl https://download.mono-project.com/repo/centos6-stable.repo | sudo -E tee /etc/yum.repos.d/mono-centos6-stable.repo

docs/install_centos_7.sh

@@ -4,7 +4,6 @@
 
 sudo -E systemctl stop firewalld
 
-sudo -E yum update -y
 sudo -E yum install epel-release yum-utils -y
 sudo -E rpm --import "http://keyserver.ubuntu.com/pks/lookup?op=get&search=0x3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF"
 curl https://download.mono-project.com/repo/centos7-stable.repo | sudo -E tee /etc/yum.repos.d/mono-centos7-stable.repo

docs/install_ubnutu_14.sh

@@ -5,8 +5,6 @@
 sudo -E apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
 sudo apt-get install -y apt-transport-https
 echo "deb http://download.mono-project.com/repo/ubuntu stable-trusty main" | sudo -E tee /etc/apt/sources.list.d/mono-official-stable.list
-yes | sudo -E apt-get update -y
-yes | sudo -E apt-get upgrade -y
 curl -sL https://deb.nodesource.com/setup_10.x | sudo -E bash -
 yes | sudo -E apt-get install -y curl git build-essential libreadline-dev libsqlite3-dev mono-complete nodejs
 sudo -E npm install pm2 -g

docs/install_ubnutu_16.sh

@@ -5,8 +5,6 @@
 sudo -E apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
 sudo apt-get install -y apt-transport-https
 echo "deb http://download.mono-project.com/repo/ubuntu stable-xenial main" | sudo -E tee /etc/apt/sources.list.d/mono-official-stable.list
-yes | sudo -E apt-get update -y
-yes | sudo -E apt-get upgrade -y
 curl -sL https://deb.nodesource.com/setup_10.x | sudo -E bash -
 yes | sudo -E apt-get install -y curl git build-essential libreadline-dev libsqlite3-dev mono-complete nodejs
 sudo -E npm install pm2 -g

docs/install_ubnutu_18.sh

@@ -4,8 +4,6 @@
 
 sudo -E apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
 echo "deb http://download.mono-project.com/repo/ubuntu stable-bionic main" | sudo -E tee /etc/apt/sources.list.d/mono-official-stable.list
-yes | sudo -E apt-get update -y
-yes | sudo -E apt-get upgrade -y
 curl -sL https://deb.nodesource.com/setup_10.x | sudo -E bash -
 yes | sudo -E apt-get install -y curl git build-essential libreadline-dev libsqlite3-dev mono-complete nodejs
 sudo -E npm install pm2 -g