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Technology Insights

What Package Installs more Via Yum On CentOS Linux

InsightsBy alexSeptember 12, 2011Leave a comment

Typically you don’t need to install more because it is always already installed. The other night while researching something on a Windows 7 computer that had Cygwin installed we were looking to use more but it wasn’t installed. I am not sure if all default Cygwin installations don’t include more but in this case it…

Technology Errors

Postfix Error: cannot update mailbox /var/mail/user for user user. error writing message: File too large

ErrorsBy alexFebruary 26, 2011Leave a comment

Earlier while troubleshooting an error with PHP’s mail function I noticed an error in the maillog on a CentOS server. I know I have run into this error before and previously I fixed the issue by setting a larger size limit on the Postfix mailboxes. Below is information about the Postfix error in the maillog…

Technology Insights

How to Search For Patterns In Files That Are Compressed With gzip or gunzip

InsightsBy alexSeptember 3, 2009Leave a comment

It can be beneficial sometimes to search for patterns in files on a Linux server that have been compressed with gzip instead of having to uncompress each file to search through it. A good example of this if typically in log rotation you rotate the logs and compress the older log files so if you are troubleshooting…

Technology Insights

Delete All Mail Using the mail Command From the CLI of a Linux Server

InsightsBy alexJune 3, 2009Leave a comment

Deleting mail from a Linux users local account is easy using the mail command line utility. The mail command can also be used to perform any other functions that you can think of to manage email such as replying to messages, reading messages, or just sending messages. It is very basic in nature but it…

Technology Insights

How to Check CPU Speed on Linux

InsightsBy alexJanuary 11, 2009Leave a comment

The easiest way to check CPU speed and CPU model on Linux is to issue the below command from the CLI. bash more /proc/cpuinfo | egrep ‘model name|cpu MHz’ This will return results like the below that will list CPU model name on one line followed by CPU speed on the next line. bash [root@server…

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