Monthly Archives: August 2013

If your partition goes RO

If you mount some partition on storage (using ISCSI), and it shows up as RO (read-only), here are the symptoms, and what can be done about it : Symptoms for partition unmount : # touch test touch: cannot touch `test’: … Continue reading

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Sar with graphics

Sar is a program which goes with (more or less) all of the Linux distros, and certainly goes with RHEL i CentOS. It does a great job, and gives good graphs. But all in tables and numbers. Graphs would be … Continue reading

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Adding CentOS repository to RHEL server

Installation of CentOS repository on RHEL6 : # vi /etc/yum.repos.d/centos.repo In file (since we are making the new one), we put the following : [centos] name=CentOS $releasever – $basearch baseurl=http://ftp.heanet.ie/pub/centos/6/os/$basearch/ enabled=1 gpgcheck=0 Testing : # yum install gd Loaded plugins: … Continue reading

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SendmailAnalyzer

I need the per hour analysis of mail messages (how many per which hour), and my MailScanner can’t do this, so I have been experimenting with SendmailAnalyzer(link). Links with installation instructions : link1 Installing on CentOS 6U4 : Which Perl … Continue reading

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