After cloning a VMWare image I had noticed that my CentOS Linux server renamed eth0 as eth1, eth1 as eth2 and so on. This is due to wrong or duplicate mac address. To fix this problem login to your CentOS Linux server using console and type the following commands:
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udev allows Linux users to have a dynamic /dev directory and it provides the ability to have persistent device names. In this tip you will learn about creating the static SCSI device name for /block/sdd as /dev/scsiharddisk.
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/dev/shm is nothing but implementation of traditional shared memory concept. It is an efficient means of passing data between programs. One program will create a memory portion, which other processes (if permitted) can access. This will result into speeding up things on Linux.
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