• PROCESSOR 64-bit VS 32-bit

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    Differences: 32-bit and 64-bit OS: A 64 bit processor is faster than a 32 bit processor. For 32 bits there is no need of any wide main bus to carry 32 bits at a time but for 64 bits its must that you should have a wider bus to carry 64bits. On a 32-bit operating […]

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  • MISCELLANEOUS…

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    Miscellaneous 1) Mount ISO image using loopback device (need to have loopback device support): # mount -o loop -o rw Centos-5.6-i386.iso /mnt ——————————————————————————————– 2) Strace: strace lets you decipher what’s going on when you have no debugger nor the source code. strace often gives me answers much more quickly than a debugger, especially if the […]

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  • WORKING WITH ”ACL” (setfacl & getfacl)..

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    Working with ACL (setfacl & getfacl) ACL is for enhancing permission level on few directories/files. Sometimes your filesystem are not ACL enabled so you need to mount that partition with acl. Here is the procedure: # vi /etc/fstab /dev/sda3 /var/www ext3 defaults,acl 0 0 # mount -o remount /var/www A) Check the ACL being already […]

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  • NETWORK BONDING…

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    Network Bonding Bonding:-Bonding allows you to aggregate multiple ports into a single group such that you can aggregate 3MB ports of 3 cards (1MB each). This provides faults tolerance as well as Load Balancing. ———————————————————————————————— Firstly check whether bonding driver is installed & ‘ifenslave’ user level control program installed. If not:- Configure kernel with ‘make […]

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  • XEN Networking: ”Bridging plus VLAN”

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    Xen Networking: Bridging plus VLAN A bridge is a device that separates two or more network segments within one logical network (e.g. a single IP-subnet).The job of the bridge is to examine the destination of the data packets one at a time and decide whether or not to pass the packets to the other side […]

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