Nagios® Specialist

8+ years hands-on experience in various Nagios and Linux projects

  * Nagios / Icinga Clusters for large environments
  * Analysis, Design
  * Linux and Windows Monitoring
  * Plug-In Development
  * Front-End Design
  * Performance Tuning
  * Integration, Automation
  * Training


CV profile:  English  German


Norbert Uwe Klein
Neue Häuser 16
01877 Schmölln-Putzkau
Germany
Tel. +491624919289
gopal@freehealer.org
USt-IdNr.: DE247960288


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Notes for Linux Administrators

Rss Feed Linux

Linux Notepad

Simple load testing of the Apache2 webserver with ab

The command awk

Use Allrights to backup and restore file permissions suid sgid sticky bits owners and groups

How to save and restore the partition table

How to extract a single database from a full MySQL dump

How to burn a single file or directory with growisofs

Use basename to get the filename from a path

Bash scripts for text file manipulations

How to change the file permissions with chmod and chown

How to create cronjobs

The command cut

The command date

The command diff

Retrieve DNS information with dig

How to disable a Linux user account

Example telnet ESMTP session with SMTP AUTH

How to use fdisk within a shell script

The command file

The command find

How to find processes associated with open ports

For loops as one-liners and within shell scripts

The command fuser

Encrypting and decrypting files with GnuPG

Creating .htpasswd and .htaccess files from the command line

The internal field separator IFS

The if statement in bash scripts and as a oneliner

The commands kill and jobs

Create large files with random content

Reboot with magic sys requests

Mysql commands

How to find the name of the linux distribution

The command pgrep

The command pmap

Configure Postfix as a relay client

The command procinfo

The command pstree

Running MySQL queries from a shell script or from the command line

How to plan a Nagios monitoring project

The command recode

Use screen to return to a session on a remote server even if the connection has been closed

The command sed

How to rewrite the sender address in Postfix

How to find out the current shell type

Show logins with the command last

Examples of SNMP requests

The command split

How to redirect stdin, stdout, stderr and use simple interprocess communication

Process examination with strace

Display and set Linux kernel parameters with sysctl

The command tar

Basic commands and tips for the text editor Vim

Get a nice directory overview in the shell with tree

Control permissions of new files and directories with umask

How to handle unusual file or directory names

The command watch

The command wc

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