Job Scheduling; mainly crontab, at, batch command Backup stetegy; incremental, full system back up; diff between tar & ufsdump diff between hard link & softlink How to list only the directories inside a directory (Ans. ls -l|grep “^d”) RAID levels; pros & cons of diffrent levels; what is RAID 1+0 How to recover a system [...]

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On a fresh install, why does Apache have three config files – srm.conf, access.conf and httpd.conf? – The first two are remnants from the NCSA times, and generally you should be ok if you delete the first two, and stick with httpd.conf. What’s the command to stop Apache? – kill the specific process that httpd [...]

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What’s in the file /etc/ttys? – Configuration for virtual consoles for the startup. By default FreeBSD has 8 virtual consoles. You’re told that the permissions of a file are 645. Quick, how do you calculate what it means? – The permissions value are always 4 for read, 2 for write, 1 for execute. The three [...]

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Difference between layer 2 and layer 3 devices? What is VLAN? What is the subnet for a class C network? Are you familiar with automounter? Have you configured an NIS server/client? Have your configured a NFS server? Windows and Linux interoperability how to? What is RAID 1?

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