HowTo Run a Script In Linux

How do I run a Linux shell script? How can I run a script in Linux? By default script will not run. You need to set execute permission for your script. To execute or run script type the following command: chmod +x script-name-here OR chmod 0755 script.sh Use the ls command to view permission on the script: $ ls -l …

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11 useful commands for Linux/Unix administrators

Command line is more powerful because you can do  lot with them,  you can tell your computer exactly what you want and get the appropriate answer, while GUI application can only tell your computer what the GUI programmer has defined.  Recently, CLI is mostly used by Linux/Unix administrators since most popular linux distros come with a complete set of GUI applications that …

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Avoiding CPU Speed Scaling – Running CPU At Full Speed

If you have a server on collocation with the super-fast CPU, that doesn’t mean that you get it running at full power. Here is a preamble. When doing inventory of Linux servers, that I’m administering, I’ve found that some of them are running on lower CPU speed, then they could. This can be easily checked with this command: #grep -E …

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How to install cron (crond, crontab) in CentOS

Cron is a daemon that can be used to schedule the execution of recurring tasks according to a combination of the time, day of the month, month, day of the week, and week. This is how I install crond onto my CentOS server edition as it doesn’t seem to come preinstalled, this might not be true for other distributions and …

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How to install Nagios on CentOS 5 or 6

Introduction This guide is intended to provide you with simple instructions on how to install Nagios from source (code) on CentOS and have it monitoring your local machine inside of 20 minutes. No advanced installation options are discussed here – just the basics that will work for 95% of users who want to get started. These instructions were written based …

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Enabling SNMP On CentOS / RHEL

Setting up SNMP (Simple Network Management Protocol) on a CentOS machine is a very quick and easy process. First we will install SNMP itself by running the following command: yum install net-snmp Once you have SNMP installed we will want to install the configuration utility for SNMP. The configuration utility allows you to easily configure SNMP for both the community …

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