Category: OS

Limit CPU usage of Linux process

Limit CPU usage of Linux process

cpulimit is a small program written in C that allows to limit CPU usage by Linux process. Limit is specified in percentage so it’s possible to prevent high CPU load generated by scripts, programs...

Track file changes using auditd

Track file changes using auditd

Most of Linux distributions comes with Linux Auditing System that makes it possible to track file changes, file accesses as well as system calls. It’s pretty useful functionality for sysadmins who wish to know...

Failover and Load Balancing using HAProxy

HAProxy is open source proxy that can be used to enable high availability and load balancing for web applications. It was designed especially for high load projects so it is very fast and predictable,...

Linux Restricted Shells: rssh and scponly

Linux Restricted Shells: rssh and scponly

Restricted shells like rssh and scponly give sysadmin the possibility to limit the operations that Linux user can do, for example you can create user that will be allowed to copy files via scp...

Linux df Command Usage Examples

Linux df Command Usage Examples

This post about Linux df command opens series of articles for Linux newbies where you’ll find description and usage examples of major Linux commands like df, top, fsck, mount and so on. Introduction Linux...

Top 5 Password Managers for Linux

Top 5 Password Managers for Linux

In this post you will find set of password managers for Linux which provides secure storage for your passwords for sensitive data. If you still keep the passwords in plain text then you must...

Geolocation for Nagios

Some time ago I came across NagMap addon for Nagios and found it pretty helpful for monitoring multiple hosts around the world. For example, there are some production servers in Europe, US and others...