Add doc on installation on rpm Linux systems

client/doc/readme-aix.md

@@ -31,5 +31,7 @@ rpm -Uvh --ignoreos sysmon-*.noarch.rpm
 To restart sysmon-client process after upgrade:
 
 ```shell
+/etc/rc.d/init.d/sysmon-client stop; /etc/rc.d/init.d/sysmon-client start
+# or, if running from inittab:
 kill -HUP `ps -e -o pid,comm,args | grep sysmon-client | grep java | awk '{print $1}'`
 ```

client/doc/readme-redhat.md

@@ -0,0 +1,45 @@
+# Instruction for RedHat / CentOS / AlmaLinux Systems
+
+Please note that the software versions referenced in this document might have changed and might not be available/working unless updated.
+
+More details are available in the [README.md](../README.md) file.
+
+
+## Requirements
+
+Java 8 (or later) runtime is required.
+
+```shell
+sudo dnf install java-11-openjdk-headless
+```
+
+Use *yum* if *dnf* is not available.
+
+
+## Installation
+
+[Download](https://bitbucket.org/mnellemann/sysmon/downloads/) the latest client and plugins rpm files and install:
+
+```shell
+wget https://bitbucket.org/mnellemann/sysmon/downloads/sysmon-client-1.0.16-1.noarch.rpm
+wget https://bitbucket.org/mnellemann/sysmon/downloads/sysmon-plugins-1.0.16-1.noarch.rpm
+rpm -Ivh sysmon-client-*.noarch.rpm sysmon-plugins-*.noarch.rpm
+cp /opt/sysmon/client/doc/sysmon-client.service /etc/systemd/system/
+systemctl daemon-reload
+```
+
+Now edit the **/etc/systemd/system/sysmon-client.service** file and change the URL so that it points to *your* sysmon-server.
+
+````
+# Modify below line in /etc/systemd/system/sysmon-client.service
+ExecStart=/opt/sysmon/client/bin/client -s http://10.20.30.40:9925/metrics
+````
+
+Now enable and start the sysmon-client service:
+
+```shell
+systemctl enable sysmon-client
+systemctl start sysmon-client
+```
+
+Check logs for errors with: ```journalctl -u sysmon-client```