To install packages on RHEL 8 / CentOS 8 use yum command. Install postfix package by using the following command: yum install postfix To enable and start systemd service enter: systemctl enable postfix ; systemctl start postfix To verify the service is working we can install the mailx package: # dnf install mailx As a normal user (named foo on the […]
Install the needed software for nfs operations: yum install nfs-utils nfs-utils-lib Setup the directories that need to be shared: vim /etc/exports Here is an example of a setting in the exports file: [directory that is being shared] [IP address of client or network (ex. 10.0.0.0/24)](rw,anonuid=[uid],anongid=[gid],async) Force the update from the exports file: exportfs -r See […]
Make sure the EPEL repository is installed: sudo yum install epel-release yum-utils sudo yum install http://rpms.remirepo.net/enterprise/remi-release-7.rpm Enable PHP 7.3: sudo yum-config-manager –enable remi-php73 Install the PHP modules that you need: yum install php php-common php-cli php-gd php-ldap php-mbstring php-mcrypt php-mysqlnd php-pdo php-pear php-process php-soap php-xml That’s it! Source: https://linuxize.com/post/install-php-7-on-centos-7/
Sometimes I just want to see what IP address is generating the most traffic to my site. Here is the awk command to do it: awk ‘{a[$1]++} END {for (i in a) print a[i],i}’ [file] | sort -rnk1 | head -n 15 The command above will show the top 15 visitors, by IP address (replace […]
Converting Your Existing Certificate To PEM Format If your certificate is not in PEM format, you can convert it to the PEM format using the following OpenSSL commands: Convert DER to PEM openssl x509 -inform der -in certificate.cer -out certificate.pem Convert P7B to PEM openssl pkcs7 -print_certs -in certificate.p7b -out certificate.pem Convert PFX to PEM […]