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centos linux

CentOS or Redhat Enterprise Linux

Can you explains the basic difference between CentOS and RHEL?
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While updating my CentOS / RHEL HP Linux server via yum command it givens an error which read as follows:

There are unfinished transactions remaining. You might consider running yum-complete-transaction first to finish them

How do I fix this problem under RHEL / CentOS Linux 5.x server operating systems?
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Red Hat / CentOS: Check / List Running Services

Q. How do I list all currently running services in Fedora / RHEL / CentOS Linux server?
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Update Centos Linux

How do I update Centos Linux 5 software and apply security patches?
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How do I install all developer tools such as GNU GCC C/C++ compilers, make and others, after installing CentOS or RHEL or Fedora Linux from a shell prompt?
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Q. Under Windows it is pretty easy to find out VMware server version. How do I find out remote vmware server version using ssh client running under RHEL / CentOS Linux 5.x?
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Q. How do I install Cluster Suite software on CentOS Linux 5 IBM server for testing purpose?
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