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Linux/Unix/BSD

Information And Reviews On Linux, Unix And Bsd Operating Systems

Unix is a multi-user, multi-tasking operating system that was initially developed by Bell Labs in the 1970s. Various similar operating systems that are POSIX compliant (ie compatible with Unix) have since been developed (POSIX is an abbreviation for Portable Operating System Interface for UNIX). These include the following: the BSD family (OpenBSD, FreeBSD, NetBSD, Mac OS/X), Solaris, IRIX, AIX, SunOS, UnixWare, OpenServer and Linux.

Software written for POSIX compliant operating systems is generally able to be compiled for all POSIX platforms with little or no platform-specific changes. This makes the commands and utilities available for this extended family of operating systems very similar, and there are few differences between administering them.

The articles in this section are about useful command line utilities and commonly used application software on POSIX compliant operating systems. For Mac OSX specific articles see my OSX section.

Reverse Mapping Checking – Possible Break-in Attempt Error with SSH

When you connect to a host using SSH or SFTP it does a series of checks to ensure you are connecting to the host you are expecting to connect to. One of these is a reverse lookup on the IP … [Read more...] about Reverse Mapping Checking – Possible Break-in Attempt Error with SSH

Filed Under: Linux/Unix/BSD

Change the timezone on CentOS

I recently needed to set up a CentOS 5 box and completely forgot how to set the timezone. There's apparantly a nice easy text GUI for doing it in RHEL but I couldn't find the same thing on the CentOS … [Read more...] about Change the timezone on CentOS

Filed Under: Linux/Unix/BSD, Quick Tips

Stop logwatch reporting on a particular service on CentOS

logwatch is a system log analyzer and reporter which emails daily reports about information in the system log files in /log. On CentOS and Red Hat Enterprise Linux this is usually configured by … [Read more...] about Stop logwatch reporting on a particular service on CentOS

Filed Under: Linux/Unix/BSD

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