i have one column with data smith john michale the o/p should be smith,john,michale how we do in unix

Wipro,

Interviewer: Lets say there is a partition of 100GB. When i tried to create a file using touch command, under any directory, it was unable to create the file- '100% full disk space'. I calculated the size of each and every directory on that partition mannually by adding each file size & in came out to be total size 50GB. Then where is the remaining 50GB ? why it is showing disk space 100% full in 'df -h' command?

Infosys,

1)what is grep|sort give example? 2)what are the test commands

Cap Gemini,

how do you move a backgrounnd job to forward?

Cap Gemini,

command to display different lines that are found when compare two files?

HP,

command to show the space allocation of files?

HP,

command to view process running?

TCS,

finding the presence of a word in a list of 'n' files (pattern matching)

TCS,

unix command how to dispaly no of records in oracle?

SDF, TCS,

how to find multiple string?

Accenture, POL,

following two file are file a file b 110 aab 330 xxl i want the output like file a fileb 110 xxl 330 aab give solution ?

Accenture,

how do display only hidden files in unix?

Accenture,

I want to invest in learning things that will get me good jobs in future. But wondering if Unix knowledge is something that is a MUST have or is it better to do any Data-warehouse tool (cognos, Qclik view, ETL etc..). Please suggest me.

how you know the ip address of user system?

Polaris,

how to list all the hidden files?

Polaris,