updated notes

src/rhcsa.md

@@ -653,4 +653,27 @@ sudo semanage boolean -l -C # List all SELinux booleans
 sudo sealert -a /var/log/audit/audit.log # Display the SELinux alerts
 
 journalctl | grep -i sealert # Display the SELinux alerts
+```
+
+## Manage Packages on RHEL
+
+### rpm
+```bash
+rpm -q httpd # Display the installed packages
+rpm -qa # Display all installed packages
+
+rpm -qf /bin/bash # Display the package that installed the /bin/bash command
+rpm -ql httpd # Display the files installed by the httpd package
+rpm -ql coreutils | grep bin # Display the files installed by the coreutils package
+
+sudo rpm -i httpd-2.4.37-1.el8.x86_64.rpm # Install the httpd package
+
+sudo rpm -e httpd # Remove the httpd package
+```
+
+### rpm2cpio
+```bash
+rpm2cpio httpd-2.4.37-1.el8.x86_64.rpm | cpio -tv # Display the contents of the httpd package
+
+rpm2cpio httpd-2.4.37-1.el8.x86_64.rpm | cpio -idmv # Extract the contents of the httpd package
 ```