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Explain how to configure DHCP client?

50.Explain how to configure DHCP client? Ans. 1. Before configuring DHCP, NIC should be configured properly and recognized by the system. 2. After that it’s easy to command system to use DHCP to obtain its IP information. 3. Configuring DHCP client involves following steps : a. Open the /etc/sysconfig/networkscripts/ifcfg-eth0 file. b. Find the line bootproto=static c. Change the static to dhcp. d. Save changes. e. Restart the network by issuing command ‘service network restart’, after that system will receive its IP information from the DHCP server.

Explain memory and virtual file system in Linux.

22.Explain memory and virtual file system in Linux. Ans. 1. These file systems do not exist on disk in the same way that traditional file systems do, they either exists entirely in the system memory or they are virtual because they are an interface to system devices. 2. cramfs: cramfs is designed to cram a file System onto a small flash memory device, so it is small, simple and able to compress things well. The largest file size is 16MB and the largest file system size is 256MB since cramfs is so compressed, it isn’t instantly updateable. 3. tmpfs: tmpfs is structured around the idea that whatever is put in the /tmp file system is accessed again shortly, tmpfs solely in memory, so what you put in /tmp doesn’t persist between reboots. 4. ramfs: ramfs is basically cramfs without the compression. 5. romfs: This is a read only file system that is mostly used for initial ramdisks of installation disks. It was designed to take up very little space, so you could fit a ke...