Linux

Riz Khan on March 10th, 2011

fsck stands for File System Check and it is a disk repair utility used in Unix and Linux  based operating systems. Normally fsck is started automatically at boot time if some file system inconsistency is identified. However System Administrators can issue a manual fsck as well if they notice any issues on the running system. […]

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Riz Khan on February 28th, 2011

As part of their work, system administrators and technicians come across many instances where they have to replace some specific text in scripts or files on server. sed , which stands for stream editor is an excellent utility/language for string editing. Its very powerful and can be used to do many complex string replacements that […]

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Riz Khan on February 27th, 2011

3ware raid controller along with Adaptec and LSI are among the more      popular Raid controllers.  If you do have have right configurations you  will not get the performance you are looking for, even after spending  reasonable amount of money on these expensive controllers. If you have write cache disabled on a 3ware raid […]

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Riz Khan on February 27th, 2011

MySQL database server has tbe capability to use different database storage engines. The database storage engine is what actually do the work of storing and retrieving data from the underlying database tables. The storage engines work like a modular code which can be plugged into MySQL. Among the stroage enginers MyISAM is the one, used […]

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MySQL is one of most known and popular open source database engine. It helps application owners to run their applications or sites on a reliable platform in a cost affective way. I have been thinking from some time to do some write up on Mysql Optimization as I have found that many people keep running […]

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Riz Khan on February 13th, 2011

Few days back I came across an issue on CentOS vps where the sshd service was failing,  everything looked fine and reinstall of the service did not work either. There was no error shown at service startup, but the service status showed it was down : -bash-3.2# /etc/init.d/sshd start Starting sshd: [ OK ] -bash-3.2# […]

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