RHEL

Setting up from scratch on a VM at work

Web services

Install NGINX

$ sudo yum install yum-utils

Create /etc/yum.repos.d/nginx.repo

[nginx-stable]
name=nginx stable repo
baseurl=http://nginx.org/packages/centos/$releasever/$basearch/
gpgcheck=1
enabled=1
gpgkey=https://nginx.org/keys/nginx_signing.key
module_hotfixes=true

[nginx-mainline]
name=nginx mainline repo
baseurl=http://nginx.org/packages/mainline/centos/$releasever/$basearch/
gpgcheck=1
enabled=0
gpgkey=https://nginx.org/keys/nginx_signing.key
module_hotfixes=true

Install nginx

$ sudo yum install nginx

Set up folders

# cd /etc/nginx
# mkdir sites-available
# mkdir sites-enabled

Create a file named sites-available/unm.edu.conf

server {
        listen 80;
        listen [::]:80;
        server_name unm.edu *.unm.edu;
        return 301 https://$host$request_uri;
}

server {
        listen 443 ssl http2;
        listen [::]:443 ssl http2;

        server_name ~^(?<subdomain>.+)\.unm\.dev$;

        if (!-d /srv/www/unm.edu/$subdomain) {
                set $subdomain "base";
        }

        set $public "";
        if (-d /srv/www/unm.edu/$subdomain/public) {
                set $public public;
        }

        root /srv/www/unm.edu/$subdomain/$public;

        index index.php index.html index.htm;

        access_log /var/log/nginx/access-wildcard.unm.edu.log;
        error_log /var/log/nginx/error-wildcard.unm.edu.log;

        include php_80_params.conf;

        location / {
                try_files $uri $uri/ /index.php?$query_string;
        }

        ssl_certificate /etc/pki/tls/certs/_wildcard.unm.edu.pem;
        ssl_certificate_key /etc/pki/tls/private/_wildcard.unm.edu-key.pem;
        include letsencrypt_params.conf;
}

Install SSL certificates

Certificates should have been created by something like mkcert for development environment. The certificate should be in /etc/pki/tls/certs/ and the private key should be stored in /etc/pki/tls/private/. Then secure the private key with:

# chmod 600 /etc/pki/tls/private/_wildcard.unm.edu-key.pem

Install EPEL repo

$ sudo subscription-manager repos --enable rhel-7-server-optional-rpms --enable rhel-7-server-extras-rpms
$ cd /tmp
$ wget https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
$ sudo yum -y install epel-release-latest-7.noarch.rpm

Useful commands

Package management

Clean up cache for yum PM

$ sudo service rhsmcertd restart
$ sudo subscription-manager refresh
$ sudo yum clean all && yum rm -rf /var/cache/yum && yum makecache

List all subscriptions

$ sudo subscription-manager list --all --available | more

Install downloaded RPM package

$ sudo yum -y localinstall ~/Downloads/screen

Check if there are any disabled repositories

$ egrep -Hi '(^\[|^enabled)' /etc/yum.repos.d/*
/etc/yum.repos.d/epel.repo.rpmsave:[epel]
/etc/yum.repos.d/epel.repo.rpmsave:enabled=1
/etc/yum.repos.d/epel.repo.rpmsave:[epel-debuginfo]
/etc/yum.repos.d/epel.repo.rpmsave:enabled=0
/etc/yum.repos.d/epel.repo.rpmsave:[epel-source]
/etc/yum.repos.d/epel.repo.rpmsave:enabled=0
/etc/yum.repos.d/nginx.repo:[nginx-stable]
/etc/yum.repos.d/nginx.repo:enabled=1
/etc/yum.repos.d/nginx.repo:[nginx-mainline]
/etc/yum.repos.d/nginx.repo:enabled=1
...