Unix Revolution

If you are running RHEL/CentOS and using SELinux, and you should... be using SELinux... you may have notced the following error when you attempt to submit an immediate check of a host: Error: Could not stat() command file '/usr/local/nagios/var/rw/nagios.cmd'! There are a number of ways to see if SELinux is preventing this from working, but the quickest is to # setenforce 0 -- retry submitting # setenforce 1 If the above allowed the command to run, then just run this [root@apoc rw]# chcon -R --reference=/var/www/html /usr/local/nagios/share [root@apoc rw]# chcon -R --reference=/var/www/html /usr/local/nagios/var [root@apoc rw]# chcon -R --reference=/var/www/cgi-bin /usr/local/nagios/sbin [root@apoc rw]# chcon -R -t httpd_sys_rw_content_t /usr/local/nagios/var/rw

Preface: I have certainly not exhaustively tested this process.  I had a specific need and found a specific solution that worked. Situation:  I was issued a shiny new laptop running Red Hat Enterprise Linux 7 (with Corp VPN, certs, Authentication configuration, etc...)  The image was great, but I needed more flexibility on my bare metal.  So, my goal was to P2V the corporate image so I could just run it as a VM. * Remove corporate drive and install new SSD * install corp drive in external USB-3 case * Install RHEL 7 on new SSD * dd old drive to a disk-image file in a temp location which will be an image which is the same size as your actual drive (unless you have enough space in your destination to contain a temp and converted image) * convert the raw disk-image to a qcow file while pushing it to the final location - this step should reduce the disk size - however, I believe it will only reduce/collapse zero-byte blocks (not just free space - i.e. if you delete a file, it may