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Linux/Unix Server Monitoring HowTos

Monitor, protect, manage your Linux and Unix server. Learn how to monitor CPU, hackers, users, network, memory performance & disk availability with our tutorials & guides. ( rss feed ).

FreeBSD Unix Find Out Which Programs Are Listing On a Given Port Number

I'm a new FreeBSD Unix system user. How can I find out the process/programs names listing on a certain port on a FreeBSD Unix systems using command line? How do I lookup the process which is currently bound to the given network port on a FreeBSD server?
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Linux / Unix logtop: Realtime Log Line Rate Analyser

How can I analyze line rate taking log file as input on a Linux system? How do I find the IP flooding my Apache/Nginx/Lighttpd web-server on a Debian or Ubuntu Linux?
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Linux: Keep An Eye On Your System With Glances Monitor

Is there is a tool that can provide me a maximum of information (such as cpu, disk I/O, network, nfsd, memory and more) about my Linux/Unix server in a minimum of space in a terminal?
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CentOS / RHEL: Install iftop To Display Bandwidth Usage Per interface By Host

I am running Red Hat Enterprise Linux on IBM based system. How do I display bandwidth usage on an interface by host in real time using command line option? How do I monitor bandwidth usage in a real time on RHEL or CentOS Linux based server? How can I install iftop utility on CentOS or RHEL server using the yum command?
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CentOS / RHEL: Check If A Service Is Running Or Not

How do I find out if a service such as MySQL or Apache running on my Centos/RHEL/Fedora Linux server?
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CentOS / RHEL: Install atop (Advanced System & Process Monitor) Utility

I do not like top. How do I install Advanced System & Process Monitor tool called atop on CentOS or Red Hat Enterprise Linux 5.x/6.x+ based system using yum command?
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Install IPTraf on a Centos / RHEL / Fedora Linux To Get Network Statistics

How can I install IPTraf utility on a CentOS, Red Hat Enterprise Linux, or Fedora Linux to get a variety information on my network?
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CentOS / RHEL: Install htop An Interactive Text-mode Process Viewer

I am a new Linux/CentOS/RHEL sysadmin. How do I install an interactive text-mode process viewer for called htop on CentOS or Red Hat Enterprise Linux 5.x/6.x+ based system using yum command?
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Linux Configure Logwatch on the Central Log Server

I'm using Logwatch for reporting on unusual items in syslog. I've central logserver up and running. All other Linux servers send logs to a remote loghost called log.example.com. How do I configure Logwatch on the central log server so that it will send daily logs messages in a single e-mail?
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Mac OS X Display Access Warnings Message For The Login Window

I know how to display notice of a computer's ownership, to warn against unauthorized access, under Linux gnome desktop. How do I display similar message under Apple Mac OS X to remind authorized users of their consent to monitoring?
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